Data/hora: 13/06/2024 05:17:04

Biblioteca(s): | Embrapa Soja; Embrapa Unidades Centrais.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 18/11/2019
Data da última atualização: | 05/03/2020
Autoria: | CEREZINI, P.; KUWANO, B. H.; NEIVERTH, W.; GRUNVALD, A. K.; PIPOLO, A. E.; HUNGRIA, M.; NOGUEIRA, M. A.
Afiliação: | UEL, Londrina, PR.; UEL, Londrina, PR.; UEL, Londrina, PR.; Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brasília, DF.; ANTONIO EDUARDO PIPOLO, CNPSO; MARIANGELA HUNGRIA DA CUNHA, CNPSO; MARCO ANTONIO NOGUEIRA, CNPSO.
Título: | Physiological and N2-fixation-related traits for tolerance to drought in soybean progenies.
Ano de publicação: | 2019
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, v. 54, e00839, 2019.
Páginas: | 10 p.
DOI: | 10.1590/S1678-3921.pab2019.v54.00839
Idioma: | Inglês
Notas: | Título em português: Características fisiológicas e relativas à fixação biológica de N2 para tolerância à seca em progênies de soja.
Conteúdo: | The objective of this work was to evaluate six soybean (Glycine max) genotypes for physiological traits and biological nitrogen fixation in drought conditions, and their capacity for recovery after rewetting, based on yield components. The genotypes evaluated in a greenhouse were the following: 'BRS 317', susceptible to drought; R01-581F and R02-1325, which show biological nitrogen fixation tolerant to drought; and the BRB14-207525, BRB14-207526, BRB14-207527 bree d lines resulting from crossings between commercial genotypes and PI 471938, which shows a slow-wilting phenotype under drought. Drought conditions were applied to the genotypes at the fullflowering stage (R2) for ten days, whereas control plants were kept wellwatered. Photosynthetic rate and gas exchanges under drought were more stable in the BRB14-207526 genotype. Root biomass increased 3.5 times in R02-1325 as an adaptive response to drought. In addition, leaf ureides ? a trait related to biological nitrogen fixation in plants tolerant to drought ? remained stable in genotypes R02-1325 and R01-581F exposed to drought, but decreased in BRB14-207527. Genotypes BRB14-207526, BRB14-207527, and R02-1325 show more favorable physiological performances and a lower accumulation of ureides under drought, besides a higher grain yield after rehydration. The BRB14-207526 and BRB14-207527 progenies show drought-tolerance traits from PI 471938, whereas R02-1325 is a promising source of tolerance to drought for soybean breeding.
Palavras-Chave: | Glutamina sintetase; Glutamine synthetase; Reidratação; Rewetting; Ureídeos.
Thesagro: | Fixação de Nitrogênio; Fotossíntese; Microbiologia do Solo.
Thesaurus Nal: | Bradyrhizobium; Glutamine; Nitrogen fixation; Photosynthesis; Ureides.

Categoria do assunto:

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F Plantas e Produtos de Origem Vegetal

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/204873/1/Physiological-and-N2-fixation-related-traits.pdf
Registro original: | Embrapa Soja (CNPSO)

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