Consulta: subjectFacets:"Abiotic stress"
Registros recuperados: 85
Data/hora: 10/06/2024 14:57:39

RESPONSES OF COWPEA CULTIVARS TO SALINE STRESS
Provedor de dados: 196
Autores: Romanoski, Vanessa; de Moura Souza Filho, Paulo Roberto; Badaró Pimentel, Adérico Júnior.
The cowpea [Vigna unguiculata (L.) Walp] is widely cultivated in Northeast Brazil and stands out for its economic and social importance. Part of the cultivation area is affected by salt stress, which affects the performance of the crop. The effects of salinity can be mitigated with the development of tolerant cultivars. The objective of this work was to evaluate the behavior of cowpea cultivars under different levels of saline stress in the germination and emergence phases of the crop. Two trials evaluating the germination and emergence phases were conducted, under controlled conditions, in a factorial scheme with 11 cultivars and five solution of NaCl with concentrations ranging from 0 to 120 mM. There was a marked difference in the response of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Melhoramento genético; Estresse abiótico; Germinação; Emergência; Vigna unguiculata; Genetic improvement; Abiotic stress; Germination; Emergency.
Ano: 2023
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/7230

Interactions between plant hormones and heavy metals responses
Provedor de dados: Genetics and Molecular Biology
Autores: Bücker-Neto,Lauro; Paiva,Ana Luiza Sobral; Machado,Ronei Dorneles; Arenhart,Rafael Augusto; Margis-Pinheiro,Marcia.
Abstract Heavy metals are natural non-biodegradable constituents of the Earth's crust that accumulate and persist indefinitely in the ecosystem as a result of human activities. Since the industrial revolution, the concentration of cadmium, arsenic, lead, mercury and zinc, amongst others, have increasingly contaminated soil and water resources, leading to significant yield losses in plants. These issues have become an important concern of scientific interest. Understanding the molecular and physiological responses of plants to heavy metal stress is critical in order to maximize their productivity. Recent research has extended our view of how plant hormones can regulate and integrate growth responses to various environmental cues in order to sustain life. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ABA; Auxin; Brassinosteroid; Ethylene; Abiotic stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200373

Genome-wide identification and characterization of R2R3-MYB genes in Medicago truncatula
Provedor de dados: Genetics and Molecular Biology
Autores: Li,Wei; Liu,Ying; Zhao,Jinyue; Zhen,Xin; Guo,Changhong; Shu,Yongjun.
Abstract MYB is a large family of plant transcription factors. Its function has been identified in several plants, while there are few reports in Medicago truncatula. In this study, we used RNA-seq data to analyze and identify R2R3-MYB genes in the genome of Medicago truncatula. Phylogenetic analysis classified 150 MtMYB genes into 21 subfamilies with homologs. Out of the 150 MtMYB genes, 139 were distributed among 8 chromosomes, with tandem duplications (TD) and segment duplications (SD). Microarray data were used for functional analysis of the MtMYB genes during growth and developmental processes providing evidence for a role in tissues differentiation, seed development processes, and especially the nodulation process. Furthermore, we investigated the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicago truncatula; MYB; Abiotic stress; QRT-PCR.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400611

Mapping QTLs for drought tolerance in a SEA 5 x AND 277 common bean cross with SSRs and SNP markers
Provedor de dados: Genetics and Molecular Biology
Autores: Briñez,Boris; Perseguini,Juliana Morini Küpper Cardoso; Rosa,Juliana Santa; Bassi,Denis; Gonçalves,João Guilherme Ribeiro; Almeida,Caléo; Paulino,Jean Fausto de Carvalho; Blair,Matthew Ward; Chioratto,Alisson Fernando; Carbonell,Sérgio Augusto Morais; Valdisser,Paula Arielle Mendes Ribeiro; Vianello,Rosana Pereira; Benchimol-Reis,Luciana Lasry.
Abstract The common bean is characterized by high sensitivity to drought and low productivity. Breeding for drought resistance in this species involves genes of different genetic groups. In this work, we used a SEA 5 x AND 277 cross to map quantitative trait loci associated with drought tolerance in order to assess the factors that determine the magnitude of drought response in common beans. A total of 438 polymorphic markers were used to genotype the F8 mapping population. Phenotyping was done in two greenhouses, one used to simulate drought and the other to simulate irrigated conditions. Fourteen traits associated with drought tolerance were measured to identify the quantitative trait loci (QTLs). The map was constructed with 331 markers that covered all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Interpopulation gene-pool; Molecular markers; QTL mapping; Water deficit.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000500813

Molecular characterization and transcription analysis of DNA methyltransferase genes in tomato (Solanum lycopersicum)
Provedor de dados: Genetics and Molecular Biology
Autores: Guo,Xuhu; Xie,Qian; Li,Baoyuan; Su,Huanzhen.
Abstract DNA methylation plays an important role in plant growth and development, gene expression regulation, and maintenance of genome stability. However, only little information regarding stress-related DNA methyltransferases (MTases) genes is available in tomato. Here, we report the analysis of nine tomato MTases, which were categorized into four known subfamilies. Structural analysis suggested their DNA methylase domains are highly conserved, whereas the N-terminals are divergent. Tissue-specific analysis of these MTase genes revealed that SlCMT2, SlCMT3, and SlDRM5 were expressed higher in young leaves, while SlMET1, SlCMT4, SlDRM7, and SlDRM8 were highly expressed in immature green fruit, and their expression declined continuously with further fruit...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DNA methylation; Tissue-specific expression; Abiotic stress; Fruit ripening; Tomato.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100307

Overall picture of expressed Heat Shock Factors in Glycine max, Lotus japonicus and Medicago truncatula
Provedor de dados: Genetics and Molecular Biology
Autores: Soares-Cavalcanti,Nina M.; Belarmino,Luís C; Kido,Ederson A.; Pandolfi,Valesca; Marcelino-Guimarães,Francismar C.; Rodrigues,Fabiana A.; Pereira,Gonçalo A.G.; Benko-Iseppon,Ana M.
Heat shock (HS) leads to the activation of molecular mechanisms, known as HS-response, that prevent damage and enhance survival under stress. Plants have a flexible and specialized network of Heat Shock Factors (HSFs), which are transcription factors that induce the expression of heat shock proteins. The present work aimed to identify and characterize the Glycine max HSF repertory in the Soybean Genome Project (GENOSOJA platform), comparing them with other legumes (Medicago truncatula and Lotus japonicus) in view of current knowledge of Arabidopsis thaliana. The HSF characterization in leguminous plants led to the identification of 25, 19 and 21 candidate ESTs in soybean, Lotus and Medicago, respectively. A search in the SuperSAGE libraries revealed 68...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HSF; Fabaceae; Bioinformatics; Abiotic stress; Transcription factor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000200006

A walk on the wild side: Oryza species as source for rice abiotic stress tolerance
Provedor de dados: Genetics and Molecular Biology
Autores: Menguer,Paloma Koprovski; Sperotto,Raul Antonio; Ricachenevsky,Felipe Klein.
Abstract Oryza sativa, the common cultivated rice, is one of the most important crops for human consumption, but production is increasingly threatened by abiotic stresses. Although many efforts have resulted in breeding rice cultivars that are relatively tolerant to their local environments, climate changes and population increase are expected to soon call for new, fast generation of stress tolerant rice germplasm, and current within-species rice diversity might not be enough to overcome such needs. The Oryza genus contains other 23 wild species, with only Oryza glaberrima being also domesticated. Rice domestication was performed with a narrow genetic diversity, and the other Oryza species are a virtually untapped genetic resource for rice stress tolerance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza; Rice; Wild species; Abiotic stress; Domestication.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200238

Molecular characterization of the Jatropha curcas JcR1MYB1 gene encoding a putative R1-MYB transcription factor
Provedor de dados: Genetics and Molecular Biology
Autores: Li,Hui-Liang; Guo,Dong; Peng,Shi-Qing.
The cDNA encoding the R1-MYB transcription factor, designated as JcR1MYB1, was isolated from Jatropha curcas using rapid amplification of cDNA ends. JcR1MYB1 contains a 951 bp open reading frame that encodes 316 amino acids. The deduced JcR1MYB1 protein was predicted to possess the conserved, 56-amino acid-long DNA-binding domain, which consists of a single helix-turn-helix module and usually occurs in R1-MYBs. JcR1MYB1 is a member of the R1-MYB transcription factor subfamily. A subcellular localization study confirmed the nuclear localization of JcR1MYB1. Expression analysis showed that JcR1MYB1 transcripts accumulated in various examined tissues, with high expression levels in the root and low levels in the stem. JcR1MYB1 transcription was up-regulated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Gene expression; Jatropha curcas; R1-MYB transcription factor.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000400011

Transcriptome sequencing and expression profiling of genes involved in the response to abiotic stress in Medicago ruthenica
Provedor de dados: Genetics and Molecular Biology
Autores: Shu,Yongjun; Li,Wei; Zhao,Jinyue; Liu,Ying; Guo,Changhong.
Abstract Medicago ruthenica is a perennial forage legume with the remarkable ability to survive under unfavorable environmental conditions. It has been identified as an excellent species of Medicago that can adapt to various environmental stresses including low temperature, drought, and salinity. To investigate its potential as a genetic resource, we performed transcriptome sequencing and analysis in M. ruthenica under abiotic stresses. We generated &gt;120 million reads from six cDNA libraries, resulting in 79,249 unique transcripts, most of which were highly similar to transcripts from M. truncatula (44,608, 56.3%) and alfalfa (M. sativa, 48,023, 60.6%). Based on gene expression profiles, 2,721 transcripts were identified as abiotic stress responsive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicago ruthenica; RNA-Seq; Transcription factor (TF); Abiotic stress; Reactive oxygen species (ROS).
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400638

Eucalyptus urograndis stem proteome is responsive to short-term cold stress
Provedor de dados: Genetics and Molecular Biology
Autores: Leonardi,Gabriela de Almeida; Carlos,Natália Aparecida; Mazzafera,Paulo; Balbuena,Tiago Santana.
Eucalyptus urograndis is a hybrid eucalyptus of major economic importance to the Brazilian pulp and paper industry. Although widely used in forest nurseries around the country, little is known about the biochemical changes imposed by environmental stress in this species. In this study, we evaluated the changes in the stem proteome after short-term stimulation by exposure to low temperature. Using two-dimensional gel electrophoresis coupled to high-resolution mass spectrometry-based protein identification, 12 proteins were found to be differentially regulated and successfully identified after stringent database searches against a protein database from a closely related species (Eucalyptus grandis). The identification of these proteins indicated that the E....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Mass spectrometry; Omics; Proteomics.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200191

Antioxidant responses of wheat plants under stress
Provedor de dados: Genetics and Molecular Biology
Autores: Caverzan,Andréia; Casassola,Alice; Brammer,Sandra Patussi.
Abstract Currently, food security depends on the increased production of cereals such as wheat (Triticum aestivum L.), which is an important source of calories and protein for humans. However, cells of the crop have suffered from the accumulation of reactive oxygen species (ROS), which can cause severe oxidative damage to the plants, due to environmental stresses. ROS are toxic molecules found in various subcellular compartments. The equilibrium between the production and detoxification of ROS is sustained by enzymatic and nonenzymatic antioxidants. In the present review, we offer a brief summary of antioxidant defense and hydrogen peroxide (H2O2) signaling in wheat plants. Wheat plants increase antioxidant defense mechanisms under abiotic stresses, such...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Antioxidant enzymes; Hydrogen peroxide signaling; Wheat; Triticum aestivum.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100001

MicroRNAs play critical roles during plant development and in response to abiotic stresses
Provedor de dados: Genetics and Molecular Biology
Autores: Lima,Júlio César de; Loss-Morais,Guilherme; Margis,Rogerio.
MicroRNAs (miRNAs) have been identified as key molecules in regulatory networks. The fine-tuning role of miRNAs in addition to the regulatory role of transcription factors has shown that molecular events during development are tightly regulated. In addition, several miRNAs play crucial roles in the response to abiotic stress induced by drought, salinity, low temperatures, and metals such as aluminium. Interestingly, several miRNAs have overlapping roles with regard to development, stress responses, and nutrient homeostasis. Moreover, in response to the same abiotic stresses, different expression patterns for some conserved miRNA families among different plant species revealed different metabolic adjustments. The use of deep sequencing technologies for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: MiRNAs; Development; Abiotic stress; Nutrients; Deep sequencing.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600023

Identification and characterization of homeobox genes in Eucalyptus
Provedor de dados: Genetics and Molecular Biology
Autores: Rocha,Graça Celeste Gomes; Corrêa,Régis Lopes; Borges,Anna Cristina Neves; Sá,Claudio Bustamante Pereira de; Alves-Ferreira,Márcio.
Homeobox genes encode transcriptional factors, usually involved in molecular control of plant developmental patterns. They can be divided into several classes according to conserved sequences within the homeobox region and the presence of specific additional sequences. Based on these conserved sequences, we developed a search procedure to identify possible homeobox genes in the Eucalyptus Genome Sequencing Project Consortium (FORESTs) database. We were able to identify 50 Eucalyptus sequences (EST-contigs) containing the homeodomain sequence. Phylogenetic analysis was applied to this ESTs-contigs and 44 of them were found to have similarities with one of three well-known homeobox classes: Bell, Knox and HD-Zip, and their sub-classes. However, no EST-contig...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant development; Abiotic stress; Eucalyptus; FORESTs; Phylogenetic analysis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400005

Plant responses to stresses: role of ascorbate peroxidase in the antioxidant protection
Provedor de dados: Genetics and Molecular Biology
Autores: Caverzan,Andréia; Passaia,Gisele; Rosa,Silvia Barcellos; Ribeiro,Carolina Werner; Lazzarotto,Fernanda; Margis-Pinheiro,Márcia.
When plants are exposed to stressful environmental conditions, the production of Reactive Oxygen Species (ROS) increases and can cause significant damage to the cells. Antioxidant defenses, which can detoxify ROS, are present in plants. A major hydrogen peroxide detoxifying system in plant cells is the ascorbate-glutathione cycle, in which, ascorbate peroxidase (APX) enzymes play a key role catalyzing the conversion of H2O2 into H2O, using ascorbate as a specific electron donor. Different APX isoforms are present in distinct subcellular compartments, such as chloroplasts, mitochondria, peroxisome, and cytosol. The expression of APX genes is regulated in response to biotic and abiotic stresses as well as during plant development. The APX responses are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbate peroxidase; Antioxidant system; Reactive oxygen species; Abiotic stress; Mutant plants.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600016

AtchitIV gene expression is stimulated under abiotic stresses and is spatially and temporally regulated during embryo development
Provedor de dados: Genetics and Molecular Biology
Autores: Gerhardt,Liliane B. de A.; Magioli,Cláudia; Perez,Ana B.U.C.M.; Margis,Rogério; Sachetto-Martins,Gilberto; Margis-Pinheiro,Márcia.
The expression of AtchitIV gene was analysed in Arabidopsis plants submitted to abiotic stresses. Transcript accumulation was detected in leaves in response to UV light exposure, exogenous salicylic acid administration and wounding. Transgenic Arabidopsis plants carrying AtchitIV promoter::gus fusion also showed differential expression of the reporter gene in response to these treatments. The AtchitIV expression was also analysed during Arabidopsis embryo development. GUS assay demonstrated AtchitIV promoter activation in zygotic embryos from torpedo stage up to full maturation. Promoter deletion analysis indicated that all the 5' cis-acting elements responsible for the specific tissue expression are located in a region of 1083 bp, adjacent to the start of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Chia4 Arabidopsis thaliana endochitinase; Embryogenesis; Gene expression; Promoter.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100020

Selection of tomato genotypes for drought tolerance and agronomic potential through different selection indexes
Provedor de dados: Horticultura Brasileira
Autores: Oliveira,Camila S de; Maciel,Gabriel M; Fraga Júnior,Eusímio F; Peixoto,Joicy Vitória M; Assunção,Vitor B; Marques,Douglas José.
ABSTRACT The selection of genotypes with agronomic potential associated with drought tolerance is considered of high complexity. An alternative could be the use of selection indexes that can evaluate multiple characteristics simultaneously. This study aimed to select tomato genotypes with agronomic potential and drought tolerance by selection indexes. The experiment was conducted in a randomized block design with three replications. Ten treatments were evaluated: seven genotypes F2RC3, donor genitor (Solanum pennellii), recurrent genitor (UFU-040), and cv. Santa Clara. The irrigation was suspended until the substrate reached a matric potential of ≤-25 kPa for water stress simulation during the tomato cycle at 45, 60, 80 and 100 days after sowing. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Abiotic stress; Selection gains; Backcross; Water deficit.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100102

Fisiologia da planta de sorgo.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MAGALHAES, P. C.; DURAES, F. O. M.; SCHAFFERT, R. E.
Estadios de desenvolvimento do sorgo; Altura da planta e desenvolvimento inicial das folhas; Perfilhamento; Sistema radicular; Desenvolvimento da parte aerea; Florescimento; Aspectos gerais dos efeitos ambientais sobre o crescimento do sorgo; Acumulacao de materia seca e producao; Rebrota; Tanino no grao de sorgo; Tolerancia de plantas a estresses ambientais; Tolerancia aos solos acidos.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Estresse abiotico.; Fisiologia; Sorghum Bicolor; Sorgo.; Abiotic stress; Physiology.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484470

Oil palm fatal yellowing (FY), a disease with an elusive causal agent.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: BITTENCOURT, C. B.; LINS, P. de C.; BOARI, A. de J.; QUIRINO, B. F.; TEIXEIRA, W. G.; SOUZA JUNIOR, M. T.
Abstract: Fatal yellowing disease (FY) is a bud rot-type disease that severely affects oil palm plantations in Latin America. Since 1974, when it was first reported in Brazil, this disorder has been responsible for severe economic losses in the oil palm industry; and, for nearly 50 years, several studies have tried to identify its causal agent, without success. The etiological studies regarding FY in oil palm explored either biotic and abiotic stress scenarios, in a single or combined manner. Most recently, the hypothesis in favor of one biotic cause has lost some grounds to the abiotic one, mainly due to new insights regarding deficient aeration in the soil, which reduces the potential for oxy-reduction, causing changes in the ionic composition of the...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Amarelecimento letal; Fatal yellowing; Dendê; Epidemiology; Palm oils; Abiotic stress; Biotic stress; Etiology; Elaeis; Tropical agriculture.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135533

The role of noncoding RNAs in the response of oil palm plants to abiotic stresses.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: SALGADO, F. F.; GRYNBERG, P.; SOUZA JUNIOR, M. T.
The discovery of noncoding RNAs (ncRNAs) is changed our understanding of genome, transcriptome, and interactions with proteome in a cell. Since the discovery of the first microRNA (miRNA) called lin-4 on Caenorhabditis elegans in 1993, our understanding of gene expression has deepened. Further miRNA discoveries have led to the investigation of new ncRNA families and their function, biogenesis, and interactions with other types of molecules. Recent developments in bioinformatics, public databases, sequencing technologies, and biochemical techniques have increased our understanding of the biogenesis, function, and interactions of ncRNAs. This book provides an overview of current ncRNA research dealing with human diseases and cancer and plant miRNAs.
Tipo: Parte de livro
Palavras-chave: Óleo Vegetal; Oil palm products; Abiotic stress; Salt stress; Transcriptome; Oilseed crops.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148820

Perdas econômicas geradas por estresses bióticos e abióticos na produção brasileira de soja no período 2016-2020.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: HIRAKURI, M. H.
bitstream/item/223151/1/Circ-Tec-169.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Economia Agrícola; Economia da Produção; Perda da Produção; Soja; Stress; Soybeans; Abiotic stress; Biotic stress.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131745

The Potential of Microalgae for the Production of Bioactive Molecules of Pharmaceutical Interest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mimouni, Virginie; Ulmann, Lionel; Pasquet, Virginie; Mathieu, Marie; Picot, Laurent; Bougaran, Gael; Cadoret, Jean-paul; Morant-manceau, Annick; Schoefs, Benoit.
Through the photosynthetic activity, microalgae process more than 25% of annual inorganic carbon dissolved in oceans into carbohydrates that ultimately, serve to feed the other levels of the trophic networks. Besides, microalgae synthesize bioactive molecules such as pigments and lipids that exhibit health properties. In addition, abiotic stresses, such as high irradiance, nutrient starvation, UV irradiation, trigger metabolic reorientations ending with the production of other bioactive compounds such as omega-3 fatty acids or carotenoids. Traditionally, these compounds are acquired through the dietary alimentation. The increasing, and often unsatisfied, demand for compounds from natural sources, combined with the decrease of the halieutic resources,...
Tipo: Text
Palavras-chave: Bioactive compound; Alga; Pigment; Lipid; Health benefit; Abiotic stress; Metabolic reorientation; Diatom.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00118/22894/20847.pdf

Phenotypic correlation and direct and indirect effects of aerial part components with root distribution of common bean
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Velho,Luis Paulo Saraiva; Gemeli,Murielli Sabrina; Trevisani,Nicole; Pereira,Thayse Cristine Vieira; Cerutti,Paulo Henrique; Melo,Rita Carolina de; Guidolin,Altamir Frederico; Coimbra,Jefferson Luís Meirelles; Corrêa,Sabrina Cristina.
Abstract: The objective of this work was to estimate the phenotypic correlation and the direct and indirect effects of the aerial part components of common bean (Phaseolus vulgaris) that are associated with root distribution, in order to facilitate the indirect selection for this character. Sixteen genotypes were used, from which 12 are segregating populations in the F6 generation and four are fixed populations, which were conducted in field conditions in a randomized complete block design, with two replicates. The root system evaluation was performed according to Böhm’s method. Pearson’s phenotypic correlation was estimated by the path analysis. The characters stem diameter, leaf area index, first pod set, and root angle showed the highest positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Abiotic stress; Indirect selection; Path analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000500328

Yield components and reproductive, physiological, and root traits used in early selection for nitrogen use efficiency in corn
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Morais,Pedro Patric Pinho; Sousa,Massaine Bandeira e; Galli,Giovanni; Andrade,Luciano Rogério Braatz e; Fritsche-Neto,Roberto; Oliveira,Aluízio Borém de.
Abstract: The objective of this work was to examine the possibility of using yield components and reproductive, physiological, and root traits in early selection for nitrogen use efficiency (NUE) in corn. Sixty-four inbred lines were evaluated under two nitrogen fertilization levels: ideal and low. The evaluations were performed at three phenological stages: eight fully-expanded leaves, tasseling stage, and physiological maturity. It is possible to select superior lines for NUE, but the yield components did not show differential behavior under the different nitrogen levels evaluated. Root, reproductive, and physiological traits are not promising for early selection of corn lines with high NUE. Likewise, the eight-leaves and tasseling stages were not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; GBlup; Indirect selection; Path analysis; Selection index.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000500620

Combining ability of maize grain yield under different levels of environmental stress
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Souza,Leandro Vagno de; Miranda,Glauco Vieira; Galvão,João Carlos Cardoso; Guimarães,Lauro José Moreira; Santos,Izabel Cristina dos.
The objectives of this work were to caracterize the tropical maize germplasm and to compare the combining abilities of maize grain yield under different levels of environmental stress. A diallel was performed among tropical maize cultivars with wide adaptability, whose hybrid combinations were evaluated in two sowing dates, in two years. The significance of the environmental effect emphasized the environmental contrasts. Based on grain yield, the environments were classified as favorable (8,331 kg ha-1), low stress (6,637 kg ha-1), high stress (5,495 kg ha-1), and intense stress (2,443 kg ha-1). None of the genetic effects were significant in favorable and intense stress environments, indicating that there was low germplasm variability under these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Breeding; Diallel; Drought.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000013

Transpiration response of upland rice to water deficit changed by different levels of eucalyptus biochar
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Pereira,Rogério Gomes; Heinemann,Alexandre Bryan; Madari,Beata Emoke; Carvalho,Marcia Thais de Melo; Kliemann,Huberto José; Santos,Aurélio Pereira dos.
The objective of this work was to evaluate the effect of eucalyptus biochar on the transpiration rate of upland rice 'BRSMG Curinga' as an alternative means to decrease the effect of water stress on plant growth and development. Two-pot experiments were carried out using a completely randomized block design, in a split-plot arrangement, with six replicates. Main plots were water stress (WS) and no-water stress (NWS), and the subplots were biochar doses at 0, 6, 12 and 24% in growing medium (sand). Total transpirable soil water (TTSW), the p factor - defined as the average fraction of TTSW which can be depleted from the root zone before water stress limits growth -, and the normalized transpiration rate (NTR) were determined. Biochar addition increased TTSW...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus; Oryza sativa; Abiotic stress; Water deficit.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500012

Genetic control of grain yield and nitrogen use efficiency in tropical maize
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Souza,Leandro Vagno de; Miranda,Glauco Vieira; Galvão,João Carlos Cardoso; Eckert,Fernando Roberto; Mantovani,Éder Eduardo; Lima,Rodrigo Oliveira; Guimarães,Lauro José Moreira.
The objectives of this work were to study the genetic control of grain yield (GY) and nitrogen (N) use efficiency (NUE, grain yield/N applied) and its primary components, N uptake efficiency (NUpE, N uptake/N applied) and N utilization efficiency (NUtE, grain yield/N uptake), in maize grown in environments with high and low N availability. Experiments with 31 maize genotypes (28 hybrid crosses and three controls) were carried out in soils with high and low N rates, in the southeast of the state of Minas Gerais, Brazil. There was a reduction of 23.2% in average GY for maize grown in soil with low N, in comparison to that obtained with high N. There were 26.5, 199 and 400% increases in NUtE, NUpE, and NUE, respectively, for maize grown with low N. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Absorption efficiency; Combining ability; Commercial hybrids; Utilization efficiency.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008001100010

Water relations in physic nut according to climatic seasonality, in semiarid conditions
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Rodrigues,Bruno Monteiro; Arcoverde,Gabriela Burle; Antonino,Antônio Celso Dantas; Santos,Mauro Guida.
The objective of this work was to determine the effect of climatic seasonality on physic nut (Jatropha curcas), in field, under semiarid climate conditions. Stomatal conductance (g s), transpiration (E), soluble leaf carbohydrates (SLC), free amino acids (FAA) and total proteins (TP) were measured in leaves, in a commercial plantation in Northeast Brazil, during the summer and autumn. Plants showed high g s and E, as well as SLC, FAA and TP contents in the summer, which gradually decreased with the lower temperatures and photosynthetically active radiation during the autumn, despite the higher water availability. Even in conditions of adequate water availability, the combination of low temperatures and reduced light drastically decreased foliar metabolism.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas; Abiotic stress; Biodiesel; Stomatal conductance.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000900020

The use of sunflower transcription factors as biotechnological tools to improve yield and stress tolerance in crops
Provedor de dados: Phyton: Revista Internacional de Botánica Experimental
Autores: Chan,R.L.
Transcription factors (TFs) are proteins able to specifically recognize DNA sequences in the regulatory regions of their target genes. They bind these specific sequences, an event that leads to the activation or repression of whole signal transduction pathways. In plants about 1500 TFs were informatically identified; identification was mainly based in the presence of DNA-binding domains in the translated sequences. They were classified in families and subfamilies according to several features, including the conservation of the DNA binding domain, the genes structures and the functions they exert. Among transcription factors, several seem to be potential powerful biotechnological tools to improve crops via obtaining transgenic plants. Assigned purposes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sunflower; Transcription factors; HD-Zip; Homeodomain; Leucine zipper; Abiotic stress; Biotic stress.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000100002

Effect of Trinexapac-Ethyl, at Two Application Timings, on the Initial Development of Eucalyptus under Water Deficit
Provedor de dados: Planta Daninha
Autores: BACHA,A.L.; MARTINS,P.F.R.B.; ALVES,P.L.C.A.; PAULA,R.C.
ABSTRACT: Eucalyptus plants are sensitive to stress during their initial development, and water deficit is the most important one. Thus, the hormetic effect caused by the application of chemical products may be a factor that allows plants to tolerate such stresses. The objective of this study was to evaluate the effects of trinexapac-ethyl on the initial growth of Eucalyptus urophylla (Clone I-144), under water deficiency, at two application timings (before planting - BP; and after planting - AP). Two experiments were conducted simultaneously in a greenhouse for 74 days after planting (DAP) eucalyptus in 15 L pots. Treatments consisted of three trinexapac-ethyl doses (0.0, 30, and 60 g a.i. ha-1) and two water conditions (with and without water deficit). A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus urophylla; Hormesis; Subdose; Abiotic stress.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100203

Water stress and temperature on germination and vigor of Handroanthus impetiginosus (Mart. ex DC)
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Santos,Paulo C. S.; Benedito,Clarisse P.; Alves,Tatianne R. C.; Paiva,Emanoela P.; Sousa,Erivanessa C.; Freires,Afonso L. A.
ABSTRACT Water availability and temperature are among the main abiotic factors that influence seed germination and vigor, since they act directly on biochemical and physiological processes, which result in the production of the primary root. The objective of this study was to verify the effects of stress on germination and vigor of H. impetiginosus (‘ipê-roxo’) seeds under different temperatures and osmotic agents. The experimental design was completely randomized, in a 6 x 2 factorial scheme (osmotic potentials x temperatures) with four replicates of 25 seeds for each osmotic agent. In order to simulate water stress, polyethylene glycol (PEG 6000) and mannitol solutions were used and distilled water was used as control. Osmotic potentials of 0, -0.2,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bignoniaceae; Forest species; Abiotic stress.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000500349

Physiological changes in Mimosa caesalpiniifolia Benth. seeds from different sources and submitted to abiotic stresses
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Sousa,Eduardo C.; Silva,Daniel V.; Sousa,Danielle M. M.; Torres,Salvador B.; Oliveira,Renata R. T.
ABSTRACT Seed germination of species that develop in arid and semi-arid soils can be altered by water deficit and abundance of salts in the soil. Knowledge on tolerance limits is fundamental to understand the adaptive capacity of species under such conditions. The objective of this study was to evaluate the physiological changes (germination and vigor) of Mimosa caesalpiniifolia seeds from different regions and submitted to water and saline stresses. To simulate water stress, the osmotic agent polyethylene glycol (PEG 6000) was adjusted to the potentials of 0, -0.2, -0.4, -0.6 and -0.8 MPa, whereas for the saline stress, NaCl solutions were adjusted to the potentials of 0, -0.1, -0.3, -0.5, -0.7; -0.9 and -1.1 MPa. The experimental design was completely...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; ‘Sabiá’; PEG; NaCl; Abiotic stress.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600383

Hydropriming as inducer of salinity tolerance in sunflower seeds
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Matias,Janete R.; Torres,Salvador B.; Leal,Caio C. P.; Leite,Moadir de S.; Carvalho,Sara M. C.
ABSTRACT Sunflower is a species with multiple potentialities and its yield can be affected by the presence of soluble salts in the soil, which is common in arid, semi-arid and irrigated regions. The objective of this study was to evaluate the effect of hydropriming as inducer of salinity tolerance in seeds and seedlings of sunflower, hybrid MG305CP. The germination tests were set with four replicates of 50 seeds per treatment, maintained in germinator at 30 ºC for ten days. To simulate salinity, sodium chloride diluted in distilled water was used at electrical conductivities of 0 (control), 4, 8, 12 and 16 dS m-1. On the tenth day, the number of normal seedlings was counted and the length and dry matter of shoots and roots were determined. Seedling fresh...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus; Asteraceae; Physiological conditioning; Abiotic stress; Electrical conductivity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400255

Critical periods of sorghum and palisadegrass in intercropped cultivation for climatic risk zoning
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Lima,Nino Rodrigo Cabral de Barros; Santos,Patricia Menezes; Mendonça,Fernando Campos; Araujo,Leandro Coelho de.
The objective of this work was to define critical periods for sorghum and palisadegrass cultivated on crop-livestock integrated systems under water deficit. An experiment was carried out in a completely random block design with four treatments (control and interruption of water supply in three periods) and three replicates. Water supply was interrupted until soil water humidity was close to permanent wilting point at the phases: germination of palisadegrass seeds; start of tillering of palisadegrass and initiation of panicles of shorghum; start of shorghum flowering. Water deficit starting at palisadegrass germination delayed intital development of the plants because of the reduction in tillering. Water restriction at panicle initiation phase and at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Brachiaria brizantha; Crop-livestock integrated systems; Drought.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700008

Early indirect selection for nitrogen use efficiency in maize1
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Caixeta,Débora Santos; Fritsche-Neto,Roberto; Granato,Ítalo Stefanine Correia; Oliveira,Lucimar Rodrigues de; Galvão,João Carlos Cardoso.
Several studies to evaluate nitrogen use efficiency (NUE) have been carried out using early growth stages. However, there are no scientific reports on the ideal stage for evaluation and on which characteristics have the highest correlation with the NUE at that stage. The aim therefore was to identify the phenological stages and secondary characteristics which maximize accuracy in early indirect selection for NUE in maize. To do this, three endogamic maize strains were evaluated in a completely randomised design with five replications, in a triple factorial scheme (strains x N levels x phenological stage), at two contrasting nitrogen levels: low and high nitrogen. The plants were evaluated at five growth stages: stage nine (V9), with 14 fully-developed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Path analysis; Abiotic stress; Plant breeding.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200369

Genetic control of traits associated with phosphorus use efficiency in maize by REML/BLUP
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: DoVale,Júlio César; Fritsche-Neto,Roberto.
The improvement phosphorus use efficiency (PUE) allows to reach satisfactory yields with lower costs. A breeding strategy for PUE is to increase its components, the phosphorus acquisiton efficiency (PAE) and phosphorus utilization efficiency (PUtE). Thus, this study aimed to identify: i) the relative importance of the components of PUE, in high and low phosphorus; ii) the relationship of root system length and shoot dry mass (SDM) with PUE and its components and; iii) the genetic control of traits associated with the PUE. Forty-one hybrid combinations were evaluated in two experimental environments representing contrasting conditions of availability of phosphorus: low (LP) and high (HP). A randomized block design with two replications were used in simple...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Genic effect; Abiotic stress; Mixed Models.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300018

Genetic tolerance to low temperatures in irrigated rice
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Streck,Eduardo Anibele; Aguiar,Gabriel Almeida; Silva,Pedro Ujacov da; Fronza,Rafael Tobias Lang; Magalhães Júnior,Ariano Martins de.
ABSTRACT The aim of this study was to characterise genetic variability to low-temperature tolerance in the emergence stage of irrigated-rice genotypes under controlled and field conditions. Thirty-seven genotypes were evaluated, interspersed with controls of different levels of low-temperature tolerance. The design used was of randomised blocks with three replications. The genotypes were submitted to germination and emergence in controlled-temperature trials at 13 ºC (Trial I) and 17 ºC (Trial II), and in field environments with no cover (Trial III) and with a cover of polyethylene (Trial IV), where the soil temperature was monitored. The evaluations were carried out daily by counting the emerged seedlings and later inferring the speed of emergence index...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L.; Abiotic stress; Cold; Genetic variability.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300416

Water stress on germination and vigor of ‘mofumbo’ (Combretum leprosum Mart.) seeds at different temperatures
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Leal,Caio César Pereira; Torres,Salvador Barros; Dantas,Nadjamara Bandeira de Lima; Aquino,Gutierres Silva Medeiros; Alves,Tatianne Raianne Costa.
ABSTRACT Combretum leprosum Mart., commonly known as ‘mofumbo’, is used for medicinal purposes, recovery of degraded areas and apiculture. The objective of this study was to evaluate the effect of water stress on the germination and vigor of C. leprosum seeds as function of different temperatures. To compose the treatments, the substrate used was paper roll moistened with polyethylene glycol solutions (PEG 6000), at the following levels of osmotic potential: 0.0; -0.1; -0.2; -0.2; -0.4; and -0.5 MPa, and placed in chamber at constant temperatures of 25, 30 and 35 and alternating temperature of 20-30 °C, forming a 6 x 4 factorial. The seeds were submitted to the following evaluations: germination percentage, germination speed index, root length, shoot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Combretaceae; Osmotic potential; Abiotic stress.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100413

CULTIVO SEMI-HIDROPÔNICO COMO FERRAMENTA DE SELEÇÃO PARA TOLERÂNCIA AO ALUMÍNIO EM GRAMÍNEAS FORRAGEIRAS
Provedor de dados: Revista Engenharia na Agricultura
Autores: Colombo, Gustavo André; Vaz-de-Melo, Aurélio; Machado Filho, Gilberto Coutinho; Sousa, André Silva de.
O aprimoramento constante das ferramentas de seleção se faz necessário, no sentido de otimizar a eficiência de um programa de melhoramento para tolerância ao alumínio. Desta forma, o objetivo deste trabalho foi estabelecer um volume de vaso ideal ao cultivo semi-hidropônico de gramíneas forrageiras submetidas ao estresse por alumínio em solução nutritiva. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições, sendo cada repetição constituída por uma planta por vaso. Os tratamentos foram dispostos em esquema fatorial 4x5, sendo o primeiro fator constituído por quatro genótipos de gramíneas forrageiras (Brachiaria Humidicola; Brachiaria brizantha cv. Piatã; Panicum maximum cv. Massai e Panicum maximum cv. Mombaça) e o...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxic aluminum; Abiotic stress; Nutrient solution; Forage production.
Ano: 2016
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/654

Physiological performance of seed and seedling of tomato under different temperatures
Provedor de dados: Revista Scientia Agraria Paranaensis
Autores: Gehling, Vânia Marques; Mendonça, André Oliveira; Anjos, Flávio Cunha; Allgayer, Grégor D'Ávila; Villela, Francisco Amaral; Aumonde, Tiago Zanatta.
The objective of this study was to evaluate the physiological performance of seeds and seedlings of tomato under the influence of different temperatures. The experiment was conducted in the Didactic Laboratory of Seed Analysis – ERS, UFPel. Gaúcho® tomato seeds were used. Treatments consisted of the constant temperatures 18, 20, 22, 24 and 26 ºC. To determine the physiological performance of the seeds and seedlings were employed germination assessments, first count, germination speed index, accelerated aging, cold test, shoot and primary root length, dry matter of roots and shoots, seedling emergence at 14 and 21 days after sowing, and emergence speed index. The results showed that tomato seed germination is not affected by the temperatures 18 to 26 ºC....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accelerated aging; Abiotic stress; Solanum lycopersicon; Cold test.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13647

Water restriction and physiological traits in soybean genotypes contrasting for nitrogen fixation drought tolerance
Provedor de dados: Scientia Agricola
Autores: Cerezini,Paula; Fagotti,Dáfila dos Santos Lima; Pípolo,Antonio Eduardo; Hungria,Mariangela; Nogueira,Marco Antonio.
ABSTRACT Biological nitrogen fixation (BNF) is essential to the economic viability of the soybean [Glycine max (L.) Merrill] crop in Brazil, but drought may impair the BNF processes. We evaluated physiological traits of nitrogen fixation drought-tolerant (NFDT) (R01-581F, R01-416F and R02-1325) and drought-susceptible (CD 215 and BRS 317) genotypes of soybean subjected to drought or regular water supply between 45 and 55 days after emergence, in an experiment under greenhouse conditions in pots containing non-sterile soil. R01-581F had more stable photosynthetic and transpiration rates, and higher intercellular CO2 levels under drought. Drought reduced the chlorophyll concentration in all genotypes, but with less intensity in R01-581F and R02-1325. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Abiotic stress; Nodulation; Total soluble sugars; Ureides.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000200110

Agronomic and molecular characterization of wild germplasm Saccharum spontaneum for sugarcane and energycane breeding purposes
Provedor de dados: Scientia Agricola
Autores: Silva,Jorge Alberto Gonçalves da; Costa,Paulo Mafra de Almeida; Marconi,Thiago Gibbin; Barreto,Everton Jean da Silva; Solís-Gracia,Nora; Park,Jon-Won; Glynn,Neil Charles.
ABSTRACT: Among the species related to sugarcane, Saccharum spontaneum (L.) is a wild species with the greatest potential as a source of genetic variation to cope with biomass production in harsh environments. Due to its high yield, early vigor, ratooning ability, low input requirements and tolerance to various biotic and abiotic stresses, sugarcane breeders have shown interest in its contribution, as a donor of genes, to the development of high biomass energy canes. The conservation, evaluation and utilization of the genetic variability of S. spontaneum available in germplasm collections are critical for breeding, but, given the aggressive rhizomatous growth habit and the ability to propagate via seed dispersal, S. spontaneum is classified as a noxious...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Molecular markers; Yield; Bioenergy; Abiotic stress; Core collection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400329

Accuracy and simultaneous selection gains for N-stress tolerance and N-use efficiency in maize tropical lines
Provedor de dados: Scientia Agricola
Autores: Mendonça,Leandro de Freitas; Granato,Ítalo Stefanine Correia; Alves,Filipe Couto; Morais,Pedro Patric Pinho; Vidotti,Miriam Suzane; Fritsche-Neto,Roberto.
ABSTRACT Maize plants can be N-use efficient or N-stress tolerant. The first have high yields in favorable environments but is drastically affected under stress conditions; whereas the second show satisfactory yields in stressful environments but only moderate ones under optimal conditions. In this context, our aim was to assess the possibility of selecting tropical maize lines that are simultaneously N-stress tolerant and N-use efficient and check for differences between simultaneous selection statistical methods. Sixty-four tropical maize lines were evaluated for Nitrogen Agronomic Efficiency (NAE) and Low Nitrogen Tolerance (LNTI) response indices and two per se selection indices, Low Nitrogen Agronomic Efficiency (LNAE) and Harmonic Mean of Relative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Correlation between traits; Winter maize; Mixed models.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000600481

ESTs analysis in maize developing kernels exposed to single and combined water and heat stresses
Provedor de dados: Scientia Agricola
Autores: Andjelković,Violeta; Ignjatović-Micić,Dragana.
Molecular and metabolic response of plants to a combination of two abiotic stresses is unique and cannot be directly extrapolated from the response of plants to each of the stresses individually. cDNA macroarray has become a useful tool to analyze expression profiles and compare the similarities and differences of various expression patterns. A macroarray of approximately 2,500 maize (Zea mays L.) cDNAs was used for transcriptome profiling in response to single and simultaneous application of water and high temperature stress of maize developing kernels at 15 days after pollination. All stress treatments (water stress-WS, heat stress-HS and their combined application-CS) induced changes in expression of 106 transcripts with 54 up-regulated and 52...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Down-regulation; Macroarray; Up-regulation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300013

Jatropha curcasand Ricinus communisdisplay contrasting photosynthetic mechanisms in response to environmental conditions
Provedor de dados: Scientia Agricola
Autores: Lima Neto,Milton Costa; Martins,Marcio de Oliveira; Ferreira-Silva,Sérgio Luiz; Silveira,Joaquim Albenísio Gomes.
Higher plants display different adaptive strategies in photosynthesis to cope with abiotic stress. In this study, photosynthetic mechanisms and water relationships displayed byJatropha curcasL. (physic nuts) andRicinus communisL. (castor bean), in response to variations in environmental conditions, were assessed.R. communis showed higher CO2 assimilation, stomatal and mesophyll conductance thanJ. curcas as light intensity and intercellular CO2 pressure increased. On the other hand,R. communis was less effective in stomatal control in response to adverse environmental factors such as high temperature, water deficit and vapor pressure deficit, indicating lower water use efficiency. Conversely,J. curcas exhibited higher photosynthetic efficiency (gas exchange...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Castor bean; Photosynthesis; Physic nut; Acclimation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000300260

Gas exchange in 'BRS Princesa' banana ( Musa spp.) under partial rootzone drying irrigation in the north of Minas Gerais, Brazil
Provedor de dados: Acta Agronómica
Autores: Santos,Marcelo Rocha dos; Rodrigues Donato,Sérgio Luiz; Arantes,Alessandro de Magalhães; Coelho,Eugênio Ferreira; Oliveira,Polyanna Mara de.
Abstract This research aimed to evaluate physiological characteristics of 'BRS Princesa' banana under partial rootzone drying irrigation, PRD. The five treatments, 1 - 50% of reduction in water depth (WD) with a frequency alternation of irrigation side (FA) of seven days during the whole production cycle; 2 - 50% of WD and FA of 14 days in the cycle; 3 - 50% of WD and FA of 21 days; 4 - 50% of WD with a fixed irrigation (only one lateral line on one side of the plant); and 5 - full irrigation (two lateral lines with open shutoff valve) throughout the cycle, they were arranged in a randomized block design with five replicates. There is a reduction in photosynthetic rates and water use efficiency as a result of enzymatic impairment or stomatal closure, due...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Irrigation techniques; Photosynthetic rate; Stomatal closure; Vegetative growth; Water deficit.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000300378

Effects of vitamin pre-sowing treatment on sweet maize seedlings irrigated with saline water
Provedor de dados: Acta Agronómica
Autores: Pradi-Vendruscolo,Eduardo; Seleguini,Alexander.
Abstract Salinity stress represents an obstacle for the production of plants of commercial interest, including sweet maize. Among the techniques used to suppress the effects caused by excess salts in the soil is the exogenous application of vitamins. Thus, the objective of this study was to evaluate the effect of the pre-sowing treatment of sweet maize seeds in solutions of thiamine, niacin and these two vitamins combined on the development of the plants irrigated with saline water. The treatments were composed by the 24 h pre-sowing treatment with water, thiamine solution (thiamine 100 mg L-1), niacin solution (niacin 100 mg L-1) and a combined solution with these two vitamins (thiamine 50 mg L-1 + niacin 50 mg L-1) irrigated with saline water. A control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Defense mechanism; Vitamin B1; Vitamin B3; Zea mays L. saccharata Strut.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000100020

Pollen viability of Tepary bean (Phaseolus acutifolius A. Gray.) mutant lines under water stress conditions and inoculation with rhizobia
Provedor de dados: Acta Agronómica
Autores: Crespo-Muñoz,Sergio; Rivera-Peña,Mariela; Rosero-Alpala,Deisy Alexandra; Muñoz-Florez,Jaime Eduardo; Rao,Idupulapati M; Muñoz-Florez,Ligia Carmenza.
Abstract Tepary bean, Phaseolus acutifolius A. Gray, is tolerant to drought and high temperatures but has low genetic diversity in its cultivated forms. To increase this diversity, a research program on mutation induction was initiated. The aim of this study was to establish the effect of different agro-morpho-physiological parameters on pollen viability and quantity in 123 mutant lines M5 of P. acutifolius and parental genotypes, by processing micrographs of pollen stained with acetocarmine. The experiment was conducted under greenhouse conditions and the experimental design was a split-split plot with three replicates; in addition, the factors evaluated were as follows: soil moisture conditions, inoculation with Bradyrhizobium sp. or Rhizobium tropici,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; High temperature; Humidity content; Fabaceae; Rhizobiaceae; Inoculation; Mutation induction.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200319

Hydrogen sulfide: a new endogenous player in an old mechanism of plant tolerance to high salinity
Provedor de dados: Acta Botanica Brasilica
Autores: da-Silva,Cristiane J.; Modolo,Luzia V.
ABSTRACT High salinity affects plants due to stimulation of osmotic stress. Cell signaling triggered by nitric oxide (NO) and hydrogen sulfide (H2S) activates a cascade of biochemical events that culminate in plant tolerance to abiotic and biotic stresses. For instance, the NO/H2S-stimulated biochemical events that occur in plants during response to high salinity include the control of reactive oxygen species, activation of antioxidant system, accumulation of osmoprotectants in cytosol, induction of K+ uptake and Na+ cell extrusion or its vacuolar compartmentation among others. This review is a compilation of what we have learned in the last 10 years about NO participation during cell signaling in response to high salinity as well as the role of H2S, a new...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Cell signaling; Hydrogen sulfide; Nitric oxide; NO and H2S biosynthesis; Salt stress.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100150

Sustainable production of bioactive alkaloids in Psychotria L. of southern Brazil: propagation and elicitation strategies
Provedor de dados: Acta Botanica Brasilica
Autores: Magedans,Yve Verônica da Silva; Rodrigues-Corrêa,Kelly Cristine da Silva; Costa,Cibele Tesser da; Matsuura,Hélio Nitta; Fett-Neto,Arthur Germano.
ABSTRACT Psychotria is the largest genus in Rubiaceae. South American species of the genus are promising sources of natural products, mostly due to bioactive monoterpene indole alkaloids they accumulate. These alkaloids can have analgesic, antimutagenic, and antioxidant activities in different experimental models, among other pharmacological properties of interest. Propagation of genotypes with relevant pharmaceutical interest is important for obtaining natural products in a sustainable and standardized fashion. Besides the clonal propagation of elite individuals, the alkaloid content of Psychotria spp. can also be increased by applying moderate stressors or stress-signaling molecules. This review explores advances in research on methods for plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Alkaloids; Elicitation; Monoterpenes; Plant propagation; Psychotria; Southern Brazil; Sustainability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400607

Genetic responses of traits relationship to components of nitrogen and phosphorus use efficiency in maize - doi: 10.4025/actasciagron.v35i1.15237
Provedor de dados: Acta Scientiarum: Agronomy
Autores: DoVale, Júlio César; Universidade Federal de Viçosa; Maia, Ciro; Universidade Federal de Viçosa; Fritsche-Neto, Roberto; Universidade Federal de Viçosa; Miranda, Glauco Vieira; Universidade Federal de Viçosa; Cavatte, Paulo Cézar; Universidade Federal de Viçosa.
This study had three objectives: i) to observe maize inbred lines response to nitrogen (N) and phosphorus (P) acquisition as well as their utilization efficiencies and traits of root morphology in contrasting levels of these nutrients, ii) to study the relationship between root morphology and nutrient use efficiencies for both nutrients, and iii) to identify contrasting parents with components N and P use efficiency for an inheritance study. We evaluated 15 inbred lines in two experiments conducted in contrasting conditions of N and P. We evaluated the shoot, root traits and nutritional efficiencies and observed the genetic variability for most traits. Selection can be practiced for most of these traits in specific environments. Under conditions of...
Tipo: Pesquisa
Palavras-chave: Agronomia; Melhoramento Vegetal Zea mays; Acquisition and utilization efficiencies; Root morphology; Abiotic stress; REML/BLUP Genética e melhoramento de plantas Zea mays; Acquisition and utilization efficiencies; Root morphology; Abioticstress; REML/BLUP.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15237

Expression of genes related to soil flooding tolerance in soybeans
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Casarotto, Gabriele; Kaspary, Tiago Edu; Cutti, Luan; Thomas, André Luis; Barbosa Neto, Jose Fernandes.
The flooded environment brings about injuries to soybeans that vary depending on the adaptation ability of the genotype. Oxygen deprivation promotes the induction of the expression of genes related to glycolysis and fermentation pathways to maintain energy metabolism and, in addition to reducing-power consuming processes, act in the formation of adaptive structures and the maintenance of the redox status of the plant. The aim of this work was to evaluate the relative expression of genes related to soil flooding response in two contrasting soybean cultivars. Soybean plants of the sensitive (BRS 154) and tolerant (I27) cultivars at the V1 development stage were submitted to the flooding and control conditions (without flooding) for 0, 24, 48, and 96 hours....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max (L.) Merr.; Hypoxia; Abiotic stress; Metabolic alterations; RT-qPCR.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42709

Physiological analysis and gene expression analysis of ZmDBP3, ZmALDH9, ZmAN13, and ZmDREB2A in maize lines
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Marques, Thaís Lima; Pinho, Renzo Garcia Von; Pinho, Édila Vilela de Resende Von; Paniago, Bruno da Costa; Freitas, Natália Chagas; Santos, Heloisa Oliveira dos.
The objective of this study was to evaluate gene expression related to water deficit tolerance in maize lines. For this, lines previously classified as tolerant (91-T and 32-T) and non-tolerant (24-NT and 57-NT) to water deficit were used. The seeds of the four lines were evaluated for emergence and emergence speed index, and the seedlings were evaluated for root and shoot length under two conditions of water availability (70 and 10% substrate water retention capacity). In transcript analysis, the expression of several genes associated with water deficit tolerance, ZmDBP3, ZmALDH9, ZmAN13, and ZmDREB2A, was evaluated by qRT-PCR for the 91-T and 57-NT lines. It can be concluded that soil water deficiency did not reduce root development. However, the shoot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Zea mays; QRT-PCR.; Water deficit; Genética Vegetal.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/43479

Evaluation of grain sorghum hybrids for aluminum tolerance in nutrient solution
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Menezes, Cicero Beserra de; Lima, Geisiane Matos; Marucci, Rosangela Cristina; Bernardino, Karine Costa; Santos, Crislene Vieira dos; Julio, Marcos Paulo Mingote; Schaffert, Robert Eugene.
 Sorghum (Sorghum bicolor L. Moench) is one of the most important cereal crops in the world. In Brazil, the acreage of grain sorghum during off-season is quite expansive. Most of this area is the Cerrado, a Brazilian biome that is similar to a Savannah and is characterized by high acidity and soluble aluminum at toxic levels for plants. The aluminum acts as a limiting factor in achieving high yields. The purpose of this work was to phenotype sorghum hybrids for aluminum tolerance. Eighteen hybrids were evaluated in a nutrient solution containing {0} or {27} µM Al3+. The work was carried out in a growth chamber at the Embrapa Maize and Sorghum, from April 4 to May 30, 2014. The lines ATF 13B (susceptible) and ATF 14B (tolerant) were used as check cultivars....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum bicolor; Abiotic stress; Soil acidity; Plant breeding.; Melhoramento Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35304

The behavior of maize hybrids generated from contrasting progenies regarding the use of nitrogen
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Guedes, Fernando Lisboa; Ferreira Junior, Edivaldo José; Castro, Carlos Eduardo Caixeta de; Pereira, Carlos Henrique; Prado, Paulo Eduardo Rodrigues; Souza, João Cândido de.
The purpose of this study was to evaluate the performance of maize hybrids synthesized from contrasting genotypes with regard to the use of nitrogen that were selected for their performance in topcrosses. Sixty-seven S0:1 progenies derived from the germplasm bank of Ufla were evaluated in topcross combinations with two testers  at two nitrogen levels. The six progenies with the greatest tolerance and responsiveness to nitrogen (RT) and the five with the least tolerance and responsiveness (RnTn) were selected and, were, afterwards, crossed in a complete diallel, for a total of 55 hybrid combinations. The following genetic parameters were estimated: genetic variance among the hybrids (σ^2G), broad sense heritability in the mean of the hybrids, and selective...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.05-9 plant breeding; Abiotic stress; Zea mays Melhoramento Vegetal.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18181

Evaluation of grain sorghum hybrids for aluminum tolerance in nutrient solution
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Menezes, Cicero Beserra de; Lima, Geisiane Matos; Marucci, Rosangela Cristina; Bernardino, Karine Costa; Santos, Crislene Vieira dos; Julio, Marcos Paulo Mingote; Schaffert, Robert Eugene.
 Sorghum (Sorghum bicolor L. Moench) is one of the most important cereal crops in the world. In Brazil, the acreage of grain sorghum during off-season is quite expansive. Most of this area is the Cerrado, a Brazilian biome that is similar to a Savannah and is characterized by high acidity and soluble aluminum at toxic levels for plants. The aluminum acts as a limiting factor in achieving high yields. The purpose of this work was to phenotype sorghum hybrids for aluminum tolerance. Eighteen hybrids were evaluated in a nutrient solution containing {0} or {27} µM Al3+. The work was carried out in a growth chamber at the Embrapa Maize and Sorghum, from April 4 to May 30, 2014. The lines ATF 13B (susceptible) and ATF 14B (tolerant) were used as check cultivars....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.05-9 Sorghum bicolor; Abiotic stress; Soil acidity; Plant breeding. Melhoramento Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35304

High temperatures on root growth and lignification of transgenic glyphosate-resistant soybean
Provedor de dados: Agrociencia
Autores: Zonetti,P. da Costa; Suzuki,L. Sayuri; Bonini,E. Aparecida; Ferrarese,M. L. Lucio; Ferrarese-Filho,Osvaldo.
Glyphosate resistant transgenic soybean [Glycine max (L.) Mettill] expresses a glyphosate insensitive EPSPS (5-enolpyruvylshikimate-3-phosphate synthase). This enzyme is involved in important secondary metabolism pathways, including lignin biosynthesis. Thus, differences in lignin content and growth between susceptible (OC14) and glyphosate-resistant soybean may be observed. The objective of this study was to evaluate differences between growth and lignin content of roots in transgenic and OC14 soybean cultivated at high temperatures. Seeds from the OC14 soybean and its transgenic cultivar, CD213RR, were germinated at 25, 27.5, 30 and 32.5 °C. After 3 d, seedlings were cultivated in Hoagland half-strength nutrient solution during 12 h photoperiods and at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glyphosate; Abiotic stress; Glycine max; Plants; Climatic changes.
Ano: 2012
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000600003

Effects of hormonal priming on seed germination of pigeon pea under cadmium stress
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: SNEIDERIS,LARISSA C.; GAVASSI,MARINA A.; CAMPOS,MARCELO L.; D'AMICO-DAMIÃO,VICTOR; CARVALHO,ROGÉRIO F.
In this work we investigated whether priming with auxin, cytokinin, gibberellin, abscisic acid and ethylene, alters the physiological responses of seeds of pigeon pea germinated under water and cadmium stress. Seeds treated with water or non-treated seeds were used as control. Although compared to non-treated seeds we found that the hormone treatments improve the germination of pigeon pea under cadmium stress, however, these treatments did not differ from water. However, we also observed a trend of tolerance to the effects of cadmium in the presence of ethylene, suggesting that the use of this hormone may be an efficient method to overcome seed germination under metal stress.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cajanus Cajan; Heavy metal; Hormones; Pretreatment in seeds; Abiotic stress.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401847

Salinity induced anatomical and morphological changes in Chloris gayana Kunth roots
Provedor de dados: Biocell
Autores: Céccoli,Gabriel; Ramos,Julio C.; Ortega,Leandro I.; Acosta,Juan M.; Perreta,Mariel G.
Chloris gayana Kunth is a grass species valuable as forage which was introduced into Argentina to be used as pasture in saline soils of subtropical and warm-temperate zones, given its good adaptability to drought, salinity and mild freezing. However, its tolerance varies according to the cultivar. In tetraploid cultivars, important reductions in yield have been observed. Here, a study of the variations produced on the root and stem system by salinity at different NaCl concentrations (0, 150 y 250 mM) was performed in the Boma cultivar, with the aim of determining the anatomical and morphological alterations produced by the salt excess. Plants cultivated with the highest level of salinity showed, in the whole, significant differences in the measured...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Tolerance; Vascular tissue.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452011000100002

Evaluation of common bean genotypes for phosphorus use efficiency in Eutrophic Oxisol
Provedor de dados: Bragantia
Autores: Silva,Daiana Alves da; Esteves,Jose Antonio de Fatima; Gonçalves,João Guilherme Ribeiro; Azevedo,Cleber Vinícius Giaretta; Ribeiro,Tamires; Chiorato,Alisson Fernando; Carbonell,Sérgio Augusto Morais.
ABSTRACT Common bean is one of the most important legumes in Latin America, mostly grown in soils with low phosphorus (P) availability. Thus, this study aimed to evaluate the responses of 20 bean genotypes to P deficiency. The experiment was a completely randomized design in a 2 × 20 factorial arrangement; the first factor consisted of P levels and the second factor, of 20 bean genotypes, with six replications. The substrate was a Red Eutrophic Oxisol with low P content. For application of the P treatments, it was applied simple superphosphate, consisting of two levels: restrictive and control, with the application of 45 and 90 kg∙ha–1 of P2O5, respectively. At 28 days, we observed the first symptoms of nutrient deficiency, with the decrease in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Abiotic stress; Plant nutrition; Genotype classification.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200152

Rice genotypes for drought tolerance: morphological and transcriptional evaluation of auxin-related genes
Provedor de dados: Bragantia
Autores: Madabula,Frederico Pedro; Santos,Railson Schreinert dos; Machado,Nata; Pegoraro,Camila; Kruger,Mariana Madruga; Maia,Luciano Carlos da; Sousa,Rogerio Oliveira de; Oliveira,Antonio Costa de.
ABSTRACT Drought stress affects crop quality and productivity. The challenge of increasing food availability for a growing worldwide demand relies on the development of tolerant cultivars that will need to be adapted to arid and semi-arid areas. In order to help the understanding of rice response to stress, the phenotypic response of 6 Brazilian rice cultivars and 2 different crosses between them were characterized under drought conditions. Since gene regulation is an important part of root morphological responses to stressful conditions, 4 genes related to auxin response and root modifications (OsGNOM1 CRL4, OsIAA1, OsCAND1 and OsRAA1) were evaluated. The expression of these genes was analyzed in stressed rice using public available microarray data and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativ; RT-qPCR; Root; Abiotic stress.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400428

Index selection of tropical maize genotypes for nitrogen use efficiency
Provedor de dados: Bragantia
Autores: Granato,Ítalo Stefanine Correia; Bermudez,Felipe Pereira; Reis,Gabriel Gonçalves dos; Dovale,Julio César; Miranda,Glauco Vieira; Fritsche-Neto,Roberto.
Nitrogen (N) limitation in maize crops is related to the fact that the efficiency of nitrogen fertilization in maize does not exceed 50%, primarily due to volatilization, denitrification and soil leaching. Therefore, the development of new nitrogen use efficient (NUE) cultivars is necessary. The aim of the present study was to develop indices for the accurate selection of NUE maize genotypes for use in conditions of both high and low N availability. The experiment was conducted in a greenhouse (20º45'14"S; 42º52'53"W) at the Federal University of Viçosa during October 2010. A total of 39 experimental hybrid combinations and 14 maize lines differing in NUE were evaluated under two N availability conditions. We determined the relative importance of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; NUE; Maize improvement.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000200009

The role of phytochromes in cadmium stress responses in tomato
Provedor de dados: Bragantia
Autores: Gaion,Lucas Aparecido; Lorevice,Paulo Guilherme; Monteiro,Carolina Cristina; Gavassi,Marina Alves; D’Amico-Damião,Victor; Gratão,Priscila Lupino; Gasparino,Eduardo Custódio; Carvalho,Rogério Falleiros.
ABSTRACT It is well known that phytochromes mediate a wide range of photomorphogenic processes in plants. In addition, many studies have demonstrated the involvement of phytochromes as part of abiotic stress signaling responses. However, little is known about cadmium (Cd) stress regulation by phytochromes. Thus, in this study, we used the phyA (far red-insensitive; fri), phyB1 (temporary redinsensitive; tri) and phyB2 (phyB2) tomato (Solanum lycopersicum L.) mutants to investigate the roles of these three phytochromes on Cd stress responses. The plants were grown over a 21-d period in the presence of Cd. We evaluated plant growth, Cd and chlorophyll content and anatomical changes in the leaves. The results indicated that all genotypes were affected by Cd...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Heavy metal; Mutants; Plant anatomy; Solanum lycopersicum. L.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100013

Molecular Characterization of a MYB Protein from Oryza sativa for its Role in Abiotic Stress Tolerance
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Deeba,Farah; Sultana,Tasawar; Javaid,Bushra; Mahmood,Tariq; Naqvi,S. M. S.
ABSTRACT The MYB family represents one of the most abundant classes of transcriptional regulators that perform pivotal role under different developmental processes and abiotic stresses. In present study, a MYB gene from Oryza sativa was selected for functional characterization. Bioinformatics analysis revealed that OsMYB1 cDNA encodes R2-R3 type DNA binding domain consisting of 413 amino acids having size of 44 kDa and pI of 6.24. DNA binding domain containing region was cloned and over-expressed in E. coli. Then, the survival of pGEX-OsMYB1 transformed E. coli cells was compared with control plasmid under different concentrations of NaCl, mannitol, high and low temperature. pGEX-OsMYB1 enhanced the survival of cells at high temperature and salinity....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; E. coli; Oryza sativa; OsMYB1; PGEX; Real time qPCR.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100411

Phytoene Synthase Gene ( PSY ) from Sweet Potato ( Ipomoea batatas Lam . ) Enhances Tolerance to Abiotic Stress
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Shao,Huanhuan; Yong,Bin; Xu,Pan; Zheng,Haiyan; Liao,Ruoxing; Wang,Xiaoyan; Li,Xinyu; Zhang,Li; Shen,Jiabin.
ABSTRACT Phytoene synthase (PSY) is the rate-limiting enzyme for carotenoid biosynthesis. To date, several studies focused on PSY genes in the context of abiotic stress responses. In this study, two phytoene synthase encoding genes, IbPSY1 and IbPSY2, were identified from a published transcriptome and bioinformatic analysis showed that they shared conserved domains with phytoene synthases from other plants. The IbPSY1 gene was cloned and carefully characterized. Digital gene expression profiling (DGE) showed that the highest transcription level of IbPSY1 was in young leaves, and the lowest level was in stems. In vivo expression levels of IbPSY1 under abiotic stress were observed to be highest in stems at day 11. Over-expression of IbPSY1 in Escherichia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ipomoea batatas; Phytoene synthase; Abiotic stress.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100422

Methodology adjustments for organic acid tolerance studies in oat under hydroponic systems
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Kopp,Mauricio Marini; Luz,Viviane Kopp da; Souza,Velci Queiróz de; Coimbra,Jefferson Luis Meirelles; Sousa,Rogério Oliveira de; Carvalho,Fernando Irajá Félix de; Oliveira,Antonio Costa de.
The occurrence of anaerobic conditions in hydromorphic soils favors the development of anaerobic microorganisms that produce phytotoxic substances representing primarily by organic acids. The selection of promising oat (Avena sativa L.) genotypes for use in those situations requires field evaluations that can be cumbersome, making hydroponics a viable alternative. The objective of this work was to adjust a methodology to use in studies of tolerance to organic acids in oat under hydroponic systems. For such goal, the best germination system was determined in order to reduce the seedling initial establishment effects under hydroponics, the ideal concentration for screening genotypes and the best variable for stress evaluation. It was found that the most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotoxicity; Levels; Abiotic stress; Genetic breeding.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300003

Genome-wide Identiﬁcation, Classiﬁcation and Expression Analysis of the Mildew Resistance Locus O ( MLO ) Gene Family in Sweet Orange ( Citrus sinensis )
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Liu,Li-Ping; Qu,Jin-Wang; Yi,Xiao-Qu; Huang,Huan-Huan.
ABSTRACT Mildew resistance Locus O (MLO), a gene family specific to plants, plays significant roles in the resistance to powdery mildew (PM) and response to a variety of abiotic stresses, plant growth and development. Despite their importance as barley, rice, wheat, few studies are reported in dicots except Arabidopsis; no global analysis has been performed in the burgeoning model fruit plant sweet orange (Citrus sinensis). The recent release of the genome sequences of C. sinensis provides an opportunity to conduct a comprehensive overview the evolution and features of the MLO gene family in sweet orange. In this study, amount to 14 members of the Citrus sinensis MLO gene (CisMLO) family according to their gene structures, conserved motifs, and similitude...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus sinensis; MLO gene family; Powdery mildew; Abiotic stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100426

Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Caldelas,Cristina; Iglesia-Turiño,Santiago; Araus,Jose L.; Bort,Jordi; Febrero,Anna.
In the present study the physiological response of water hyacinth (Eichhornia crassipes [Mart.] Solms) to the combined exposure of excess nutrients and Hg was examined. Young water hyacinth plants were exposed to a range of HgCl2 and KNO3 concentrations. After eight weeks, submerged plant tissues reached an Hg concentration of 4 mg g-1. The accumulation of P and S was reduced by the addition of HgCl2, and also the P and K concentrations in emerged and submerged parts decreased. In contrast, the addition of HgCl2 increased Ca and Mg concentrations in submerged parts. Furthermore, the concentration ratios of submerged/emerged parts for Ca, Mg and P were also reduced by the addition of HgCl2. The interaction of HgCl2 and KNO3 was synergistic and decreased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Metal accumulation; Multiple stress; Phytoremediation; Water eutrophication; Water pollution.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000100002

Photosynthetic activity in the rootstock of hybrid peach trees submitted to water restriction and flooding
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Martinazzo,Emanuela G.; Perboni,Anelise T.; Farias,Márcio E.; Bianchi,Valmor J.; Bacarin,Marcos A.
This study aimed to evaluate the effect of flooding and water restriction (drought) on the photosynthetic activity in plants of the hybrid rootstock 'GxN-9' (Prunus dulcis Mill. × Prunus persica L. Bastsch), grown in a greenhouse. Chlorophyll fluorescence and gas exchange were analyzed in plants of approximately 12 months. The reduction of photosynthetic activity in both the stresses were associated with decreased carboxylation efficiency, but without affecting the internal concentration of carbon dioxide. The JIP-test parameters revealed changes in the energy flux processes demonstrating that in terms of flooding the rootstock GxN-9 the rate of photosynthetic performance significantly decreases, resulting in a considerable decrease in net assimilation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Chlorophyll a fluorescence; Gas exchange; JIP-test; Prunus dulcis Mill. × Prunus persica L. Bastsch.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000300007

Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Blair,Matthew W.; López-Marín,Hernán D.; Rao,Idupulapati M.
Aluminum (Al) toxicity is the principal abiotic constraint in acid soils of the tropics. Common bean, meanwhile, is for the most part very sensitive to this stress although certain genotypes within the species show some level of resistance, justifying screening of germplasm from both the Andean and Mesoamerican genepools to identify better performing sources. The objective of this study was to evaluate 36 genotypes of common bean under hydroponic conditions to identify root morphological traits that could be associated with Al resistance. A total of five root traits (elongation rate of the primary root, total root length, root biomass, average root diameter and specific root length) were measured using a simple nutrient solution with or without Al (20 µM)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Acid soils; Aluminum resistance; Andean gene pool; Common bean; Root architecture.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400005

Expression of Early Light Induced Protein in Grapevine and Pea, under Different Conditions and its Relation with Photoinhibition
Provedor de dados: Chilean Journal of Agricultural Research
Autores: Berti,Maritza; Pinto,Manuel.
Early light induced proteins (ELIP) are a type of proteins which are expressed before than other chloroplast proteins in the presence of light. These proteins have been studied in a large number of annual species such as pea (Pisum sativum L.), barley (Hordeum vulgare L.) and Arabidopsis sp. In perennials plants the studies about ELIPs are very scarce. The possible photoprotective function of the ELIPs has motivated the interest in investigating the presence of this type of proteins in a perennial plant such as grapevine (Vitis vinifera L.) and if their characteristics differ from those found in annual plants. In this paper a comparative study was conducted on the ELIPs expression in grapevine and pea to investigate whether there are differences regarding...
Tipo: Journal article
Palavras-chave: Photoinhibition; ELIPs induction; Abiotic stress; Vitis vinifera; Pisum sativum.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300011

Salt stress and exogenous silicon influence physiological and anatomical features of in vitro-grown cape gooseberry
Provedor de dados: Ciência Rural
Autores: Rezende,Renata Alves Lara Silva; Rodrigues,Filipe Almendagna; Soares,Joyce Dória Rodrigues; Silveira,Helbert Rezende de Oliveira; Pasqual,Moacir; Dias,Gabrielen de Maria Gomes.
ABSTRACT: Salt stress is one of several major abiotic stresses that affect plant growth and development, and there are many evidences that silicon can ameliorate the injuries caused by high salinity. This study presents the results of an assay concerning: (1) the effect of in vitro NaCl-induced salt stress in cape gooseberry plants and (2) the possible mitigating effect of silicon in saline conditions. For that, nodal segments were inoculated in Murashige and Skoog (MS) medium under salinity (0.5 and 1.0% NaCl) with different silicic acid concentrations (0, 0.5 and 1.0g L-1). Phytotechnical characteristics, photosynthetic pigments content, and leaf anatomy were evaluated after 30 days. Shoot length, root length, number of leaves and buds, fresh and dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physalis peruviana L.; Abiotic stress; Salinity; Pigments; Anatomy.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100401

Selection of sugarcane families and clones under cold stress
Provedor de dados: Ciência Rural
Autores: Verissimo,Mario Alvaro Aloisio; Azeredo,Amaro Afonso Campos de; Silva,Sergio Delmar dos Anjos e; Brasileiro,Bruno Portela; Bespalhok Filho,João Carlos; Daros,Edelclaiton; Oliveira,Ricardo Augusto de.
ABSTRACT:  The purpose of this study was to select cold-tolerant sugarcane families and clones. Evaluations were carried out during three selection phases in the municipality of Pelotas, state of Rio Grande do Sul, Brazil. The experiments were arranged in an incomplete block design, with initially 4,452 seedlings of 53 full-sib families. Aside from the traits soluble solids content (BRX), tons of stalks per hectare (TSH) and tons of brixper hectare (TBH), the survival of the apical bud (ABS) was evaluated in the first selection stage (T1) of the breeding program. At the end of three selection phases, 15 clones of 14 of the 53 families evaluated in the first phase (T1) were selected for the experimental phase. Of these, the clones RS/PR126066, RS/PR126044,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Abiotic stress; Plant breeding; Frost.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100152

Multiple stresses on the oxidative metabolism of sugarcane varieties
Provedor de dados: Ciência Rural
Autores: Morais,Marciana Bizerra de; Camara,Terezinha Rangel; Ulisses,Cláudia; Carvalho Filho,José Luiz Sandes; Willadino,Lilia.
ABSTRACT: The exposure of plants to multiple stress conditions can cause over production of reactive oxygen species promoting an imbalance in the redox system. The aim of this study was to examine the antioxidant response from varieties of sugarcane under adverse conditions, to understand the defense mechanisms of tolerant and sensitive genotypes. Micropropagated sugarcane of six genotypes, RB966928, RB98710, RB855453, RB99395, RB867515, and RB855156, were subjected to isolated action of high-temperature stress and a combination of water and saline stress, and effects were evaluated. Activities of enzymes such as superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX), as well as stress indicators such as lipid peroxidation (MDA content)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzyme; Abiotic stress; Saccharum; ROS.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400201

Green soybean seeds: effect on physiological quality
Provedor de dados: Ciência Rural
Autores: Teixeira,Sheila Bigolin; Silva,Joseano Graciliano da; Meneguzzo,Michele Renata Revers; Martins,Andrea Bicca Noguez; Meneghello,Geri Eduardo; Tunes,Lilian Vanussa Madruga de.
ABSTRACT: The objective of this research was to assess the manner in which the presence of green soybean seeds affects their physiological quality. In this study, six lots of soybean seeds of cultivar 5958RSF IPRO with 0, 0, 7, 8, 16 and 18% of green seeds were examined. The tests done included the first germination count, germination, electrical conductivity, field emergence, accelerated aging, emergence speed index, Tetrazolium, length, dry mass and seedling growth curve. Results were tested employing the normality test and analysis of variance, and the means were compared by the Tukey test at 5% probability level, employing the Rbio statistical program. Growth data were analyzed by the nonlinear regression analytical method, using the SigmaPlot 12.0...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Decay; Seedling growth; Glycine max.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200201

Relationship between heterosis and genetic divergence for phosphorus use efficiency and its components in tropical maize
Provedor de dados: Ciência Rural
Autores: Caixeta,Débora Santos; Fritsche-Neto,Roberto; Batista,Lorena Guimarães; Carvalho,Humberto Fanelli; DoVale,Júlio César; Lanes,Éder Cristian Malta de; Miranda,Glauco Vieira.
The objective of this study was to determine the relationship between heterosis and genetic divergence for phosphorus use efficiency (PUE) in tropical maize. It was used two groups of genitors, each consisting of seven lines, contrasting with each other in the nitrogen and phosphorus use efficiency. It was obtained 41 hybrid combinations between these groups, which were evaluated in low phosphorus. Randomized complete block design with two replications was used. For obtaining the components of variance and the breeding values were used REML/BLUP method. In the genotyping of the parental lines were used 80 microsatellite markers. Through the correlation between genetic distance obtained by the markers and specific combining ability it was not possible to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dissimilarity; Abiotic stress; Molecular markers; Combining ability.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000100011

Mycorrhization and saline stress response in Hyptis suaveolens
Provedor de dados: Ciência Rural
Autores: Souza,Marília Cristina Gomes de; Morais,Marciana Bizerra de; Andrade,Marcelo da Silva; Vasconcelos,Mayron Alves de; Sampaio,Silvana Saker; Albuquerque,Cynthia Cavalcanti de.
ABSTRACT: The objective of this study was to evaluate the physiological and biochemical mechanisms of adaptation of Hyptis suaveolens under osmotic stress due to salinity inoculations with a mycorrhizal fungal species. H. suaveolens seeds were germinated in polyethylene pots containing a substrate associated with or without arbuscular mycorrhizal fungi (AMF). After plant formation, treatments were treated with different salt concentrations (0.0, 35, 70, and 105 mM) and fungi (control and two types of AMF), totaling 12 treatments with three replicates. The experimental design used randomized blocks in a 4 x 3 factorial scheme, totaling 12 treatments with three replicates each. Salinity affected all measured physiological and biochemical variables, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Abiotic stress; Salinity; Arbuscular mycorrhizal fungi.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600402

Proline synthesis and physiological response of cassava genotypes under in vitro salinity
Provedor de dados: Ciência Rural
Autores: Cardoso,Milena Nascimento; Araújo,Aparecida Gomes de; Oliveira,Leila Albuquerque Resende; Cardoso,Bruno Trindade; Muniz,Ana Veruska Cruz da Silva; Santos,Paulo Sérgio Neves dos; Oliveira,Annie Carolina Araújo de; Machado,Caroline de Araújo; Ledo,Ana da Silva.
ABSTRACT:  The objective of this research was to evaluate the proline synthesis and physiological response of cassava genotypes which were micro propagated and induced to salinity stress in vitro. Micro cuttings of approximately 1.0cm long with a single bud of genotypes TBRS Tapioqueira, BRS Verdinha and Lagoão which were previously established in vitro were inoculated in a MS medium containing different concentrations of NaCl (0; 25; 50; 75; 100mM) and were analyzed after 90th day for: number of roots, number of leaves and shoot dry mass. The proline content of BRS Tapioqueira and Lagoão was assessed at 30th, 60th and 90th day. There was no analysis of proline of the variety Verdinha because of the contamination of the explants. The experimental design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manihot esculenta; Abiotic stress; Osmoprotectors.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600401

Aluminum toxicity reduces the nutritional efficiency of macronutrients and micronutrients in sugarcane seedlings
Provedor de dados: Ciência e Agrotecnologia
Autores: Borges,Carolina Eggers; Cazetta,Jairo Osvaldo; Sousa,Francisco Bruno Ferreira de; Oliveira,Kamilla Silva.
ABSTRACT Although the effects of aluminum on the content and accumulation of mineral nutrients in crops have been studied, but nothing is known about its effect on the nutritional efficiency of sugarcane. Therefore, this study aimed to evaluate the effect of aluminum toxicity on nutritional efficiency, nutrient accumulation, and growth of sugarcane seedling. Sugarcane seedlings of the genotype IACSP95-5000, obtained from one-bud mini-cuttings (3 cm), were used in the test. Seedlings were subjected to treatments in a completely randomized design, with eight Al concentrations in the nutrient solution (0, 10, 20, 30, 40, 50, 60, and 70 mg L−1) and three replicates, totaling 24 experimental units. Analyses determined the contents, accumulation, and absorption,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Use efficiency; Acidity; Accumulation; Abiotic stress; Saccharum spp.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100233

The different response of sugarcane genotypes in multiple stress
Provedor de dados: Ciência e Agrotecnologia
Autores: Sousa,Francisco Bruno Ferreira de; Cazetta,Jairo Osvaldo; Nascimento,Sabrina da Silva.
ABSTRACT Research focused on identify abiotic stress-tolerant genotypes is highly desirable since their use may reduce costs of soil and crop management and productivity losses. The aim of this study was to determine the behavior of 24 sugarcane genotypes under high levels of Al3+ and Mn2+ associated with low availability of mineral nutrients. The experiment was carried out under greenhouse condition in a 24 × 2 factorial scheme (24 genotypes × 2 treatments: with and without stress), and four replications in completely randomized design. In the treatment without stress plants were grown in a complete nutrient solution whereas in the treatment with stress a nutrient solution with a high acidity (4.0 ± 0.1) and 5% of its original concentration, as well as a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Greenhouse; Saccharum spp; Hydroponic alternative system.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500527

GGE Biplot projection in discriminating the efficiency of popcorn lines to use nitrogen
Provedor de dados: Ciência e Agrotecnologia
Autores: Santos,Adriano dos; Amaral Júnior,Antônio Teixeira do; Kurosawa,Railan do Nascimento Ferreira; Gerhardt,Ismael Fernando Schegoscheski; Fritsche Neto,Roberto.
ABSTRACT Nitrogen is essential for sustaining life on the planet, and it is the most important nutrient for obtaining high agricultural production. However, their use leads to the release of nitrous oxide with a global warming potential 296 times higher than the CO2 molecule, making it a challenge to reduce their use in agriculture. The objective of this research was to identify efficient popcorn inbred lines and responsive nitrogen use and exhibit a good expansion volume. For this, 29 inbred lines from the Germplasm Collection of Darcy Ribeiro North Fluminense State University (UENF) were evaluated at two contrasting levels of nitrogen availability (low and ideal) at two representative locations in the north and northwest of the state of Rio de Janeiro,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Multivariate analysis; Abiotic stress; G x E interaction.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100022

Evaluation of maize top crosses under two nitrogen levels
Provedor de dados: Ciência e Agrotecnologia
Autores: Guedes,Fernando Lisboa; Souza,João Cândido de; Costa,Emiliano Fernandes Nassau; Reis,Matheus Costa dos; Cardoso,Gustavo Andrade; Ematné,Hugo Junqueira.
Maize crops in Brazil have a wide diversity of management systems. There is a large contingent of family agriculture, which uses little or no agricultural inputs, compared to the rural enterprise which uses the most modern production systems. This difference in the management systems is particularly noticeable in relation to consumption of fertilizers, especially nitrogenous ones. Therefore it is necessary to obtain plants with efficient nitrogen (N) use that also respond to applied nitrogen. Thus, the aim of the study was to evaluate the performance of S0:1 progenies, in top crosses, under two nitrogen levels and select the best ones based on responsiveness and efficiency. Sixty seven S0:1 progenies from populations of single cross hybrids were crossed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic breeding; Zea mays; S0:1 progenies; Tester; Abiotic stress.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600011

Selection of sunflower genotypes for salt stress and mechanisms of salt tolerance in contrasting genotypes
Provedor de dados: Ciência e Agrotecnologia
Autores: Azevedo Neto,André Dias de; Mota,Katia Núbia Azevedo Barros; Silva,Petterson Costa Conceição; Cova,Alide Mitsue Watanabe; Ribas,Rogério Ferreira; Gheyi,Hans Raj.
ABSTRACT Salinity is one of the main limiting factors for crop growth. The metabolic responses to salt stress are variable and depend on species characteristics. This study aimed to select sunflower genotypes tolerant to salt stress and evaluate some mechanisms of salt tolerance in two contrasting (salt-tolerant and salt-sensitive) genotypes. In the first assay, the biomass production and the accumulation of Na+ and K+ in 26 sunflower genotypes were evaluated. Genotypes AG963, AG967, AG972, BRS321, BRS324, H251, H360 and H863 showed lower biomass production and were characterized as salt-sensitive and the genotypes BRS323, Catisol, EXP11-26, EXP44-49, EXP60050, EXP887, HLA860HO and Olisun 5 showed higher biomass production and were considered...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus L.; Genotypic variation; Ion distribution; Osmotic tolerance; Abiotic stress.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100237

Expression of ZmLEA3, AOX2 and ZmPP2C genes in maize lines associated with tolerance to water deficit
Provedor de dados: Ciência e Agrotecnologia
Autores: Marques,Thaís Lima; Von Pinho,Renzo Garcia; Von Pinho,Édila Vilela de Resende; Santos,Heloisa Oliveira dos.
ABSTRACT Knowing genes related to water deficit is a valuable tool to assist and accelerate the selection process of maize genotypes more adapted to drought conditions. Therefore, this work aimed to evaluate genes expression related to tolerance to water deficit in maize lines, using proteomic and transcriptomic analyses. Two lines previously classified as tolerant (91-T) and non-tolerant (57-NT) to low water availability were used. Dried seeds, ears tips, and seedlings (collected at three, five, and seven days after sowing) of the two maize lines (91-T and 57-NT) were used in proteomic analyses. Seedlings were subject to two contrasting water-availability conditions (70% and 10% of the water retention capacity). The expression of catalase, peroxidase, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Electrophoresis; QRT-PCR.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100233

Effect of salinity stress in Setaria viridis (L.) P. Beauv. accession A10.1 during seed germination and plant development
Provedor de dados: Ciência e Agrotecnologia
Autores: Ferreira,Thalita Massaro Malheiros; Santos,Mariana de Lima; Lopes,Cecilia Lima; Sousa,Carlos Antonio Ferreira de; Souza Junior,Manoel Teixeira.
ABSTRACT Setaria viridis (L.) P. Beauv. is a species proposed to be used as model plant in reverse genetics studies for the validation of gene function. Soil salinity is a recurring problem present in more than a 100 countries worldwide, and approximately 20% of the agricultural land in the world has saline and/or sodium soils. Saline stress affects all the main processes of the plant, such as germination, growth, and, consequently, the yield. The present study aimed at determining the tolerance levels of S. viridisA10.1 to saline stress and identify its potential as a model plant to validate salt-tolerance candidate genes/alleles as well as promoter sequences from salt-responsive genes. In an initial experiment, the seeds of the plant were sown on a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Phenomics; Biosaline agriculture; Plant biotechnology; Salt responsive genes.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100244

Water restriction in different phenological stages and increased temperature affect cowpea production
Provedor de dados: Ciência e Agrotecnologia
Autores: Barros,Juliane Rafaele Alves; Guimarães,Miguel Julio Machado; Simões,Welson Lima; Melo,Natoniel Franklin de; Angelotti,Francislene.
ABSTRACT Water deficit and high temperatures are abiotic factors that most limit plant growth and development. However, its effects depend on crop development stage and on stress duration and intensity. Thus, the objective of was to evaluate the development of cowpea subjected to water restriction in different phenological stages and to increase in air temperature. The experiment was conducted with the cultivar ‘Carijó’, in growth chambers, in a 4 x 3 x 2 factorial arrangement, corresponding to levels of water availability (25, 50, 75, and 100%,), phenological stages (vegetative, flowering and pod filling) and temperature regimes (T°1: 20-26-33 °C e T°2: 24.8-30.8-37.8 °C), respectively. Reduction of water availability in the vegetative and flowering...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Oxidative stress; Phenology; Vigna unguiculata.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542021000100200