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Physiological response of seeds of peanut genotypes to water deficiency / Resposta fisiológica de sementes de genótipos de amendoim submetidos a deficiência hídrica
Carrega, Willians César; Martins, Pedro de Figueiredo Rocha Barbosa; Bacha, Allan Lopes; Cesarin, Anne Elise; Oliveira, Thiago Souza; Godoy, Ignácio José de; Alves, Pedro Luis da Costa Aguiar.
  • Carrega, Willians César; São Paulo State University. Jaboticabal. BR
  • Martins, Pedro de Figueiredo Rocha Barbosa; São Paulo State University. Jaboticabal. BR
  • Bacha, Allan Lopes; São Paulo State University. Jaboticabal. BR
  • Cesarin, Anne Elise; São Paulo State University. Jaboticabal. BR
  • Oliveira, Thiago Souza; São Paulo State University. Jaboticabal. BR
  • Godoy, Ignácio José de; Agronomic Institute of Campinas. Campinas. BR
  • Alves, Pedro Luis da Costa Aguiar; São Paulo State University. Jaboticabal. BR
Biosci. j. (Online) ; 35(3): 741-752, may./jun. 2019. graf, tab
Article in English | LILACS | ID: biblio-1048643
ABSTRACT
Among the factors that may influence the germination process of seeds, water deficiency is considered the most important. The present study aims to evaluate the physiological response of peanut genotypes to water deficiency. The experiment was conducted in a completely randomized design with four replications in a 12 x 7 factorial scheme with 12 peanut genotypes and seven polyethylene glycol 6000 concentrations corresponding to osmotic potentials of 0.00; -0.10; -0.20; -0.40; -0.60; -0.80 and -1.00 MPa. The data were submitted to analysis of variance and Tukey's test at a 5% probability level and, when significant, to analysis of variance adjusted to a quadratic polynomial curve. The germination percentage, seed vigor evaluated by the speed germination index, mean germination time, root length and root dry matter of some genotypes were affected by the osmotic potentials. Among the genotypes, there is a differential response related to the water deficiency level. In relation to the physiological response of the seeds, the lineages 506, 599, and 870 and the cultivar IAC Tatu-ST have a higher tolerance of water deficit. The peanut genotypes begin to suffer the effects of water deficiency at the osmotic potential of -0.4 MPa
RESUMO
Entre os fatores externos que podem influenciar o processo germinativo das sementes, a deficiência hídrica é considerada o mais importante. Dessa forma, o objetivo do presente trabalho foi avaliar a resposta fisiológica de sementes de genótipos de amendoim submetidos à deficiência hídrica. O experimento foi conduzido em esquema fatorial 12 x 7, tendo como tratamentos sementes de 12 genótipos de amendoim submetidos a sete concentrações de polietilenoglicol 6000, nos potenciais osmóticos correspondentes a 0,00; -0,10; -0,20; -0,40; -0,60; -0,80; -1,00 MPa. Constatou-se que os genótipos são afetados pelos potenciais osmóticos e, entre os genótipos, há resposta diferenciada em relação ao nível de deficiência hídrica. Em relação à resposta fisiológica das sementes, as linhagens 506, 599, 870 e a cultivar IAC Tatu-ST possuem maiortolerância à deficiência hídrica. Todos os genótipos de amendoim começam a sofrerem os efeitos da deficiência hídrica a partir do potencial osmótico de -0,4 MPa para a maior parte das características avaliadas
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Arachis / Seeds / Germination / Dehydration / Droughts Type of study: Controlled clinical trial Language: English Journal: Biosci. j. (Online) Journal subject: Agricultura / Disciplinas das Ciˆncias Biol¢gicas / Pesquisa Interdisciplinar Year: 2019 Type: Article Affiliation country: Brazil Institution/Affiliation country: Agronomic Institute of Campinas/BR / São Paulo State University/BR

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Full text: Available Index: LILACS (Americas) Main subject: Arachis / Seeds / Germination / Dehydration / Droughts Type of study: Controlled clinical trial Language: English Journal: Biosci. j. (Online) Journal subject: Agricultura / Disciplinas das Ciˆncias Biol¢gicas / Pesquisa Interdisciplinar Year: 2019 Type: Article Affiliation country: Brazil Institution/Affiliation country: Agronomic Institute of Campinas/BR / São Paulo State University/BR