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| Registros recuperados: 99 | |
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| Oliveira,Rívia de Souza Vaz; Salomão,Leandro Caixeta; Morgado,Hélber Souto; Sousa,Cleiton Mateus; Oliveira,Henrique Fonseca E de. |
| ABSTRACT Basil is used as spice and for medicinal purposes. Its growth is influenced by environmental factors, mainly soil moisture and air temperature. Thus, this study was installed to evaluate growth and production of basil under different levels of luminosity and water replacement. The experimental design was completely randomized, with six replicates, arranged in split plot scheme, with three luminosity levels in the plots (full sun, 50% and 70% shading) and four water replacement levels in the subplots (25, 50, 75 and 100% ETc). We evaluated plant height, stalk diameter, number of leaves and branches, root system volume, the largest root length, fresh and dry mass of roots and leaves. Data were submitted to variance analysis to observe significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ocimum basilicum; Shading; Water deficit. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300324 |
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| Almeida,Gabriel Martins; Silva,Adinan Alves da; Batista,Priscila Ferreira; Moura,Luciana Minervina de Freitas; Vital,Roberto Gomes; Costa,Alan Carlos. |
| ABSTRACT Drought is the most harmful environmental factor crop productivity. Some chemicals are used in agriculture to mitigate the damage from this stress on plants. Therefore, we examined whether the spraying of zinc sulfate (ZS), potassium phosphite (KPhi) and the hydrogen sulfide (H2S) donor sodium hydrosulfide (NaHS) would mitigate the deleterious effects of water deficit on sunflower plants by analyzing physiological and biometric characteristics. The experiment was carried out in a greenhouse using a randomized block design with five replications. The treatments were arranged in a 4 x 2 factorial scheme: [Factor A (Alleviators)] - spraying of KPhi (0.5 L ha-1), ZS (3.2 kg ha-1), NaHS (1.2 g ha-1), and water; [Factor B (substrate humidity, SH)] -... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photosynthesis; Water deficit; Malonaldehyde; Leaf water potential; Mitigating substance. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100225 |
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| Stolf-Moreira,Renata; Lemos,Eliana Gertrudes de Macedo; Abdelnoor,Ricardo Vilela; Beneventi,Magda Aparecida; Rolla,Amanda Alves Paiva; Pereira,Selma dos Santos; Oliveira,Maria Cristina Neves de; Nepomuceno,Alexandre Lima; Marcelino-Guimarães,Francismar Corrêa. |
| The objective of this work was to validate, by quantitative PCR in real time (RT-qPCR), genes to be used as reference in studies of gene expression in soybean in drought-stressed trials. Four genes commonly used in soybean were evaluated: Gmβ-actin, GmGAPDH, GmLectin and GmRNAr18S. Total RNA was extracted from six samples: three from roots in a hydroponic system with different drought intensities (0, 25, 50, 75 and 100 minutes of water stress), and three from leaves of plants grown in sand with different soil moistures (15, 5 and 2.5% gravimetric humidity). The raw cycle threshold (Ct) data were analyzed, and the efficiency of each primer was calculated for an overall analysis of the Ct range among the different samples. The GeNorm application was used to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Expression stability; RT-qPCR; Water deficit. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000100008 |
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| Covre,André Monzoli; Partelli,Fábio Luiz; Bonomo,Robson; Tomaz,Marcelo Antônio; Ramalho,José Cochicho. |
| Abstract: The objective of this work was to evaluate the concentrations and accumulation of macronutrients in conilon coffee (Coffea canephora) fruit, and their concentrations in leaves, over two years, in irrigated and nonirrigated coffee plants. Three-year-old conilon coffee plants of the cultivar Emcapa 8111 genotype 02 were used. An experimental design was carried out in randomized complete blocks, in a split-plot arrangement, with 14 replicates. The main plot factor was irrigation versus nonirrigation of coffee plants, and the split-plot factor was different fruit and leaf collection times. Collections began 10 days after the beginning of flowering and were performed on average every 28 days, until full fruit ripening. At each sampling date, five... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee; Mineral nutrition; Nutrient accumulation; Water deficit. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000901025 |
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| Santos,Osvaldir F; Cunha,Fernando F; Taira,Tiago L; Souza,Epitácio J; Leal,Aguinaldo JF. |
| ABSTRACT Proper irrigation management is crucial to obtain high yields of pea, since its cultivation is recommended in cold and dry seasons. Taking into account the great genetic diversity, we considered necessary to evaluate cultivars which best adapt to the intrinsic conditions of Cerrado Region, as it presents low fertility soil, long dry period in the winter, drought periods (veranicos) in rainy season, mainly in January and February (summer). Thus, the aim of this study was to evaluate adaptability of green-pea cultivars under different irrigation depths in Northeast Region of state of Mato Grosso do Sul. The experiment was installed in a split plot scheme, with four irrigation depths [50, 75, 100 and 125% of crop evapotranspiration (ETc)] and at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water deficit; Pisum sativum; Edaphoclimatic adaptability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200178 |
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| Engels,Cibelle; Fuganti-Pagliarini,Renata; Marin,Silvana Regina Rockenbach; Marcelino-Guimarães,Francismar Corrêa; Oliveira,Maria Cristina Neves; Kanamori,Norihito; Mizoi,Junya; Nakashima,Kazuo; Yamaguchi-Shinozaki,Kazuko; Nepomuceno,Alexandre Lima. |
| The loss of soybean yield to Brazilian producers because of a water deficit in the 2011-2012 season was 12.9%. To reduce such losses, molecular biology techniques, including plant transformation, can be used to insert genes of interest into conventional soybean cultivars to produce lines that are more tolerant to drought. The abscisic acid (ABA)-independent Dehydration Responsive Element Binding (DREB) gene family has been used to obtain plants with increased tolerance to abiotic stresses. In the present study, the rd29A:AtDREB2A CA gene from Arabidopsis thaliana was inserted into soybean using biolistics. Seventy-eight genetically modified (GM) soybean lines containing 2-17 copies of the AtDREB2A CA gene were produced. Two GM soybean lines (P1397 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arabidopsis; Differential expression; Genetically modified organism; Water deficit. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400015 |
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| Santos,Marcelo R. Dos; Donato,Sérgio L. R.; Faria,Leandro N.; Coelho,Eugênio F.; Cotrim Junior,Paulo R. F.. |
| ABSTRACT With the limited availability of water in semi-arid regions, it is necessary that irrigation is accurate and there is high water use efficiency. This study aimed to evaluate the regulated deficit irrigation (RDI) and partial rootzone drying (PRD) in yield, water use efficiency and gas exchange of ‘Tommy Atkins’ mango tree in semi-arid conditions. The experimental design was a randomized block with seven treatments for RDI under micro sprinkler and five treatments for the PRD under drip. Treatments were applied in phases PI - early blooming to early fruit expansion, PII - early expansion to early physiologic ripening and in phase III - physiologic ripening of fruits, with application of the RDI of 100, 75 and 50 % of ETc in different combinations... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mangifera; Water deficit; Water use efficiency. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601096 |
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| NEPOMUCENO,ALEXANDRE LIMA; STEWART,JAMES MCD; OOSTERHUIS,DERRICK; TURLEY,RICKIE; NEUMAIER,MORMAN; FARIAS,JOSÉ RENATO BOUÇAS. |
| The aim of this study was to identify and isolate genes that are differentially expressed in four selected cotton (Gossypium hirsutum L.) genotypes contrasting according to their tolerance to water deficit. The genotypes studied were Siokra L-23, Stoneville 506, CS 50 and T-1521. Physiological, morphological and developmental changes that confer drought tolerance in plants must have a molecular genetic basis. To identify and isolate the genes, the mRNA Differential Display (DD) technique was used. Messenger RNAs differentially expressed during water deficit were identified, isolated, cloned and sequenced. The cloned transcript A12B15-5, a NADP(H) oxidase homologue, was up regulated only during the water deficit stress and only in Siokra L-23, a drought... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Messenger RNA; Gene expression; Genetic transformation; Water deficit. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000700015 |
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| Araujo,Leandro Coelho de; Santos,Patricia Menezes; Rodriguez,Daniel; Pezzopane,José Ricardo Macedo. |
| ABSTRACT: Climate, soil and management are the main drives for growth and production of tropical pastures. Thus, a better understanding of the effects of these factors and their interactions under climate conditions is required to obtain effective management options. Here, we used data from two field trials to research on climate and management interactions on the production seasonality of Panicum maximum Jacq. Treatments included four sampling times (250, 500, 750, and 1000 °C accumulated) during eight regrowth period, under irrigated and rainfed conditions and, cuts were made to simulate grazing intensity. All treatments were arranged in a completely randomized block design with four replications. At each sampling time, basal tillers were sampled to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Daylength; Degree-days; Mombaça; Tropical forage; Water deficit. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300191 |
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| Miranda,Raiane F.; Alves Júnior,José; Casaroli,Derblai; Evangelista,Adão W. P.; Batisti,Rafael. |
| ABSTRACT The answers to when and how much to irrigate orchards can be obtained based on the measurements of plants' transpiration and leaf temperature. This study aims to determine the leaf temperature and sap flow of the pequi tree (Caryocar brasiliense Camb.), both with and without water restriction. Further, the leaf temperature was measured by infrared thermometry and estimated transpiration using the Granier method, where the thermal dissipation probes are inserted into the plant stems. The experiment was conducted in a 120-plant orchard located in Goiânia-GO, Brazil, from which seven of the plants (3 irrigated and 4 non-irrigated; aged 6.6–7.4 years) were evaluated for eight months (October 2015 to May 2016). The soil was characterized as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caryocar brasiliense Camb.; Water requirement; Water deficit; Brazilian Savannah. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500579 |
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| Liberato,Maria Astrid Rocha; Gonçalves,José Francisco de Carvalho; Chevreuil,Larissa Ramos; Nina Junior,Adamir da Rocha; Fernandes,Andreia Varmes; Santos Junior,Ulysses Moreira dos. |
| The physiological performance of acariquara (Minquartia guianensis) seedlings submitted to water deficit and the recovery of physiological parameters during rehydration were investigated in a greenhouse experiment. The analyzed parameters were: leaf water potential, gas exchange and chlorophyll a fluorescence. After thirty-five days, non-irrigated plants exhibited a leaf water potential 70 % lower compared to control plants (irrigated daily) and the stomatal conductance reached values close to zero, inducing a severe decrease in gas exchange (photosynthesis and transpiration). Six days after the beginning of the rehydration of drought-stressed plants, the results demonstrated that water stress did not irreversibly affect gas exchange and quantum efficiency... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll a fluorescence; Photochemical efficiency of PSII; Stress physiology; Tree species; Water deficit. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200008 |
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| 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 |
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| JALES, H. F.; MAGALHAES, P. C.; RONCHI, C. P.; PAIVA, A. P. L. de; CARVALHO, L. P. de; GOMES JÚNIOR, C. C.. |
| A disponibilidade de água e nitrogênio nos solos de cultivo brasileiros é vital ao metabolismo das plantas. Na busca por recursos que mitiguem o efeito da seca e da disponibilidade de nitrogênio (N), destacase o uso de bactérias diazotróficas. Nesse sentido, objetivou-se avaliar o crescimento do milho inoculado com estirpes de Azospirillum brasilense, submetido a dois níveis de N e a duas condições hídricas. O ensaio foi conduzido em vasos, mantidos em casa de vegetação, no qual foram testados os inoculantes Az1, Az2, Az3, e Az4 (mistura do inoculante Az1 com Az2 ), além de um tratamento sem inoculação, submetido a dois níveis de N (N1 - 156 kg ha-1 e N2 - 312 kg ha-1) aplicados em cobertura e a duas condições hídricas [irrigado ? solo na capacidade de... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Déficit hídrico; Water deficit; Zea Mays; Inoculação; Bactéria; Fertilizante Nitrogenado; Deficiência Hídrica; Nitrogênio; Nitrogen. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133168 |
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| APARECIDO,LUCAS EDUARDO DE OLIVEIRA; FERREIRA,RAFAEL BIBIANO; ROLIM,GLAUCO DE SOUZA; SOUZA,BIANCA SARZI DE; SOUZA,PAULO SERGIO DE. |
| ABSTRACT The influence of climate on the development of lychee fruit is complex, but few studies have discussed the problem. We developed agrometeorological models for simulating the development of fruit fresh matter (FM), fruit dry matter (DM), fruit length (LE), fruit diameter (DI), fruit volume (VO), and fruit number per cluster (FN) of the “Bengal” lychee cultivar as functions of climatic conditions. We conducted three analyses: (a) the influence of mean meteorological elements on the rates of fruit growth, (b) estimation of fruit development by the agrometeorological models using sigmoidal adjustments, and (c) simulation of fruit development using multiple nonlinear regression of two meteorological elements to improve the accuracy. A rate of water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Analysis of growth; Water deficit; Fruit number; Climate. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200701 |
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| Registros recuperados: 99 | |
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