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Registros recuperados: 119
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A research and network strategy for sustainable sorghum and pearl millet production systems for Latin America Open Agri
B.V.S..
Palavras-chave: Sorghum; Soil ph; Millets; Genotypes; Tolerance; Grain; Leaf area; Cereals; Hybrids; Breeds (animals).
Ano: 2000 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4217
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Alumínio estimula o crescimento radicular de erva-mate? PFB - Pesquisa Florestal Brasileira
Benedetti, Eliziane Luiza; Santin, Delmar; Barros, Nairam Félix de; Pereira, Greice Leal; Martinez, Hermínia Prieto; Lima Neves, Julio César.
A toxicidade por Al em plantas se dá de várias maneiras, sendo a inibição do crescimento radicular uma das primeiras a se expressar, embora não seja prontamente perceptível em razão do hábito de crescimento das raízes. O objetivo desse trabalho foi avaliar a tolerância da erva-mate ao Al por meio do crescimento de raízes de mudas submetidas a doses crescentes do elemento. Para isso, testaram-se, três clones (C1, C2 e C3), doses de 100, 500, 1.000 e 2.000 μmol L-1 de Al (AlCAlCl36H2O) e um controle sem Al. Após 50 dias, determinaram-se massa seca das raízes, comprimento e volume total do sistema radicular, comprimento e volume total das raízes em diferentes diâmetros. O Al influenciou positivamente o crescimento das raízes de todos os clones. O maior...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomia; Nutrição de plantas Raízes; Tolerância; Ilex paraguariensis Roots; Tolerance; Ilex paraguariensis.
Ano: 2017 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/983
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Ammopiptanthus mongolicus stress-responsive NAC gene enhances the tolerance of transgenic Arabidopsis thaliana to drought and cold stresses Genet. Mol. Biol.
Pang,Xinyue; Xue,Min; Ren,Meiyan; Nan,Dina; Wu,Yaqi; Guo,Huiqin.
Abstract Drought and cold are the primary factors limiting plant growth worldwide. The Ammopiptanthus mongolicus NAC11 (AmNAC11) gene encodes a stress-responsive transcription factor. Expression of the AmNAC11 gene was induced by drought, cold and high salinity. The AmNAC11 protein was localized in the nucleus and plays an important role in tolerance to drought, cold and salt stresses. We also found that differential expression of AmNAC11 was induced in the early stages of seed germination and was related to root growth. When the AmNAC11 gene was introduced into Arabidopsis thaliana by an Agrobacterium-mediated method, the transgenic lines expressing AmNAC11 displayed significantly enhanced tolerance to drought and freezing stresses compared to wild-type...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammopiptanthus mongolicus; Expression; NAC; Tolerance; Transgene.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400624
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Antioxidant system of ginseng under stress by cadmium Scientia Agricola
Marques,Teresa Cristina Lara Lanza de Sá e Melo; Soares,Angela Maria.
Toxic levels of Cd can cause protein denaturation and oxidative stress, which result in membrane damage, enzimatic activity changes and other metabolic damage. Some plants may show alteration in the activity of their antioxidant enzymes as a heavy metal tolerance mechanism. This study aims at evaluating the role of enzymes of the antioxidant system in adaptive responses of the accumulator P. glomerata species to levels of cadmium (Cd). Plants were cultivated in nutrient solutions containing concentrations of Cd in the form of CdSO4 (0, 45 and 90 µmol L-1), for 20 d. Cd concentrations and yields of root and shoot dry matter were determined at the end of the experiment. Malondialdehyde (MDA) production and the activities of antioxidant enzymes were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant enzymes; Oxidative stress; Tolerance; Cadmium toxicity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400014
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Assessing phytoplankton realized niches using a French National Phytoplankton Monitoring Network ArchiMer
Hernandez Farinas, Tania; Bacher, Cedric; Soudant, Dominique; Belin, Catherine; Barille, Laurent.
Relating environmental factors to species occurrence is a fundamental step in a better understanding of the community structure, the spatial and temporal dynamics of populations and how species may respond to environmental changes. In this paper, we used phytoplankton occurrence data, from a French national phytoplankton monitoring network, and environmental variables with the aim of characterizing the realized ecological niches of phytoplankton groups. We selected 35 phytoplankton taxa representing the most important taxa in terms of occurrence frequency and abundance along the French coast of the eastern English Channel, the Southern Bight of the North Sea and the Atlantic Ocean. We show that environmental variables such as nutrient concentration, water...
Tipo: Text Palavras-chave: Phytoplankton; Environment; Niche position; Tolerance; Kernel density; Outlying mean index.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00255/36627/35263.pdf
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Assessment of opportunities to map pearl millet tolerance to salinity during germination and early seedling growth Open Agri
Mukhopadhyay, R..
Palavras-chave: Millets; Tolerance; Genotypes; Phenotypes; Genetic markers; Genomes; Heritability; Soil salinization; Feed crops; Humus.
Ano: 2005 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3215
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Binding of Hg by bacterial extracellular polysaccharide: a possible role in Hg tolerance ArchiMer
Cruz, Kimberly; Guezennec, Jean; Barkay, Tamar.
Bacteria employ adaptive mechanisms of mercury (Hg) tolerance to survive in environments containing elevated Hg concentrations. The potential of extracellular polysaccharides (EPS) production by bacteria as a mechanism of Hg tolerance has not been previously investigated. The objectives of this study were to determine if bacterial EPS sorb Hg, and if so does sorption provide protection against Hg toxicity. Purified EPS with different chemical compositions produced by bacterial isolates from microbial mats in French Polynesian atolls and deep-sea hydrothermal vents were assessed for Hg sorption. The data showed that EPS sorbed up to 82% of Hg from solution, that this sorption was dependent on EPS composition, and that sorption was a saturable mechanism. Hg...
Tipo: Text Palavras-chave: Mercury; Bacteria; Sorption; Tolerance; Exocellular polysaccharides.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00382/49348/49786.pdf
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Biological and economic factors in the selection of cultured fish species and the development of a bio-economic model ArchiMer
Wu, R.
The selection of candidate species for mariculture is determined by a number of biological factors, e.g. foraging efficiency, growth efficiency, mortality, grow-out period and susceptibility to environmental fluctuations, disease and crowding, as well as economic factors e.g. the supply and price of fry, grow-out cost and price of adult. A computer model incorporating these major factors is being developed, to determine and compare the potential of different culture species.
Tipo: Text Palavras-chave: Lates calcarifer; Epinephelus tauvina; Mylio macrocephalus; Pisces; Marine fish; Tolerance; Biology; Modelling; Economic models; Diseases; Mortality; Growth; Cultured organisms.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1488.pdf
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Brachiaria brizantha control by using fluazifop-p-butil on Tifton 85 pasture formation R. Bras. Zootec.
Santos,Márcia Vitória; Ferreira,Francisco Affonso; Freitas,Francisco Cláudio Lopes de; Fonseca,Dilermando Miranda da; Carvalho,Abner José de; Braz,Thiago Gomes dos Santos.
This study was carried out with the aim of assessing the efficacy of the fluazifop-p-butyl herbicide to control Brachiaria brizantha, cultivar Marandu, in the formation of Tifton 85 grazing. Treatments consisted of five doses of fluazifop-p-butyl herbicide (0.0, 62.5, 125.0, 187.5 and 250.0 g ha-1) plus controls with no herbicide, in a completely randomized layout, with four replications. Each plot consisted of a 10-L capacity pot, with two B. brizantha plants and two Tifton 85 plants. The herbicide application was conducted before the tillage of B. brizantha, when they were about 15 cm high. Visual assessments of control of B. brizantha and intoxication of Tifton 85 plants, at 07, 21 and 45 days after application were carried out. Sixty days after...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical control; Tolerance; Weed.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200007
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Can the critical temperature for photochemical damage in common bean plants be changed after a drought event? Bragantia
Ribeiro,Rafael Vasconcelos; Santos,Mauro Guida dos; Pimentel,Carlos; Machado,Eduardo Caruso; Oliveira,Ricardo Ferraz de.
Low water availability and high temperatures occur under field conditions and we hypothesize that the critical temperature for photochemical damage (TC) in common bean (Phaseolus vulgaris L.) plants is increased by the occurrence of previous water deficit in a genotype-dependent manner. Five common bean cultivars A320, A222, Carioca, BAT477 and Ouro Negro were evaluated. Thirty days after seedlings emergence, one group of plants was exposed to water deficit for ten days and rehydrated and another one was maintained well hydrated during the experimental period. The minimum chlorophyll fluorescence (FO) was monitored in leaf discs exposed to temperatures ranging from 25 to 45 oC and the TC values estimated. The previous water deficit did not affect TC, which...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Chlorophyll fluorescence; Hardening; Heat stress; Phaseolus vulgaris; Tolerance.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000400374
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Capacidade de recuperação do paricá após simulação de desfolha PFB - Pesquisa Florestal Brasileira
Duarte, Daiane Marques; Barretto, Vitor Corrêa de Mattos; Ribeiro, Raquel Menestrino; Rodrigues, Fabrício.
O paricá, Schizolobium parahyba var. amazonicum (Huber ex Ducke) Barneby, é uma espécie florestal largamente utilizada em reflorestamentos. Entretanto, os danos causados por insetos podem reduzir a área fotossintética, interferindo no crescimento. Portanto, o objetivo deste trabalho foi avaliar a capacidade de recuperação de paricá em idades precoces, pela simulação de desfolha. Foi utilizado o delineamento experimental em blocos casualizados, divididos em quatro experimentos, com quatro repetições, separados em dois períodos (30 e 60 dias após emergência) e pela porcentagem de folhas e folíolos. Ao completar 30 e 60 dias após emergência foram realizadas as desfolhas e após mais 30 dias, nas duas fases, avaliou-se altura da planta, diâmetro do caule e...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Engenharia Florestal e sivicultura Schizolobium amazonicum; Tolerância; Foliar Schizolobium amazonicum; Foliar damage; Tolerance.
Ano: 2016 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1120
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Cd-tolerance markers of Pfaffia glomerata (Spreng.) Pedersen plants: anatomical and physiological features Braz. J. Plant Physiol.
Gomes,Marcelo Pedrosa; Marques,Teresa Cristina Lara Lanza Sa e Melo; Martins,Giordane Augusto; Carneiro,Marília Mercia Lima Carvalho; Soares,Ângela Maria.
Physiological and anatomical features of Cd-tolerance in Pfaffia glomerata were examined by exposing plantlets to nutrient solutions with increasing Cd concentrations (0, 15, 45, and 90 µmol Cd L-1), and possible Cd-tolerance markers were established. Cd contents were found to be higher in roots than in shoots. According to the bio-concentration factor data, this species is effectively a Cd-hyperaccumulator, as previously attested. Cd induced the appearance of xeromorphic characteristics in leaves (decreased water potential, increased numbers and decreased stomata size) and increased root endodermis thickness. The enzymatic antioxidant systems of roots and leaves were differently affected by Cd. The coordinated activities of antioxidant enzymes were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptation; Cd-oxidative damage; Phytoextraction; Tolerance.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000400008
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Characterization of Ethoxysulfuron Herbicide Selectivity in Common Bean Cultivars Planta Daninha
PAGNONCELLI JR,F.B.; VIDAL,R.A.; TREZZI,M.M.; GALLON,M.; BRUSAMARELLO,A.P..
ABSTRACT: In literature, there are few studies evaluating the response of different bean cultivars to herbicides, particularly the ALS enzyme inhibitors. The objective of this study was to evaluate the selectivity of common bean cultivars to the herbicide ethoxysulfuron and to select cultivars that are more tolerant to it. An experiment was conducted in a greenhouse, in a completely randomized experimental design with four replications. Factors consisted in 20 bean cultivars (IPR Eldorado, IPR Siriri, IPR Gralha, IPR 81, IPR Uirapuru, IPR Colibri, IPR Tuiuiú, BRS Esplendor, IPR Tangará, IPR Juriti, IPR Corujinha, IPR Andorinha, IPR Curió, BRS Campeiro, BRS Pérola, BRS Notável, BRS Estilo, UTF 3, UTF 5 e UTF 6), and four doses of ethoxysulfuron (0, 50, 100...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Sulfonylureas; Tolerance; GGE biplot.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100311
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Chemical Control and Morphoanatomical Analysis of Leaves of Different Populations of Sourgrass Planta Daninha
GOMES,L.J.P.; SANTOS,J.I.; GASPARINO,E.C.; CORREIA,N.M..
ABSTRACT Digitaria insularis has been selected by frequent glyphosate applications both in no-till areas and in fruit orchards. The objective of this paper was to evaluate control efficacy of D. insularis populations by glyphosate, alone and mixed with quizalofop-p-tefuryl, as well as classify them for herbicide sensitivity as susceptible, moderately susceptible and tolerant. This study also aimed to evaluate the relations between herbicide sensitivity and morphoanatomic features of leaf tissues. For chemical control, the experiment was conducted in a completely randomized design, with a 12 x 4 factorial arrangement with four replications. Twelve populations of D. insularis were treated with glyphosate alone at two concentrations (1.44 and 2.16 kg a.e....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria insularis; Glyphosate; Tolerance; Genetic variability.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100202
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Chemical control of different Digitaria insularis populations and management of a glyphosate-resistant population Planta Daninha
CORREIA,N.M.; ACRA,L.T.; BALIEIRO,G..
This study aimed to control different populations of Digitaria insularisby glyphosate herbicide, isolated and mixed, besides the combination of methods (chemical and mechanical) to manage resistant adult plants. Three experiments were conducted, one in pots which were maintained under non-controlled conditions and two under field conditions. In the experiment in pots, twelve populations of D. insularis were sprayed with isolated glyphosate (1.44 and 2.16 kg a.e. ha-1) and mixed (1.44 and 2.16 kg a.e. ha-1) with quizalofop-p tefuryl (0.12 kg i.a. ha-1). The treatment of 1.44 kg a.e. ha-1 of glyphosate plus 0.12 kg a.i. ha-1 of quizalofop was sufficient for adequate control (>95%) of all populations. Population 11 (area of grain production in Itumbiara,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Desiccation; Glyphosate; Tolerance; Genetic variability.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100093
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Chickpea Desi Variety ICCL 80074 (ICCC 37) Open Agri
Palavras-chave: Chickpeas; Iron; Yields; Tolerance; Carbohydrates; Performance; Research methods; Proteins; Tropical zones; Fungi.
Ano: 1990 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3795
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Chickpea Desi Variety ICCV 10 Open Agri
Palavras-chave: Chickpeas; Land management; Germplasm; Fungi; Tolerance; Breeds (animals); Yields; Weather hazards; Tillage equipment; Research methods.
Ano: 1994 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3863
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Chickpea Desi Variety ICCV 82108 Open Agri
Palavras-chave: Fungi; Chickpeas; Segregation; Field experimentation; Yields; Tolerance; Breeds (animals); Environmental factors; Tropical zones; Crossing over.
Ano: 1994 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3862
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Chickpea Genomics Consortium on Drought Tolerance Open Agri
Varshney, R.K.,( Rajeev K. Varshney ).
Palavras-chave: Genomes; Chickpeas; Biotechnology; Genes; Tolerance; Weather hazards.
Ano: 2007 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3324
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Chickpea Kabuli Variety ICCV 2 Open Agri
Palavras-chave: Chickpeas; Fungi; Tolerance; Tillage equipment; Tropical zones; Performance; Crops; Land resources; Yields; Quality.
Ano: 1990 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3790
Registros recuperados: 119
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