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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
Data corrente: |
04/01/2001 |
Data da última atualização: |
07/04/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PINHEIRO, B. da S.; AUSTIN, R. B.; CARMO, M. P. do; HALL, M. A. |
Afiliação: |
BEATRIZ DA SILVEIRA PINHEIRO, CNPAF; ROGER BRIAN AUSTIN; MARIA PEREIRA DO CARMO; MICHAEL ALAN HALL. |
Título: |
Carbon isotope discrimination and yield of upland rice as affected by drought at flowering. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 35, n. 10, p. 1939-1947, out. 2000. |
ISSN: |
0100-204X |
DOI: |
https://doi.org/10.1590/S0100-204X2000001000004 |
Idioma: |
Inglês |
Conteúdo: |
Field experiments involving upland rice genotypes, sown in various dates in late season, were carried out to assess the relationship of carbon isotope discrimination with grain yield and drought resistance. In each one of the three years, one trial was kept under good water availability, while other suffered water shortage for a period of 18-23 days, encompassing panicle emergence and flowering. Drought stress reduced carbon isotope discrimination measured on soluble sugars (Ds) extracted from stem uppermost internode at the end of the imposition period, but had relatively less effect on bulk dry matter of leaves, sampled at the same period, or that of uppermost internodes and grains, sampled at harvest. The drought-induced reduction in Ds was accompanied of reduced spikelet fertility and grain yield. In the three trials subjected to drought, genotypes with the highest yield and spikelet fertility had the lowest Ds. However, this relationship was weak and it was concluded that Ds is not a sufficiently reliable indicator of rice drought resistance to be useful as a screening test in breeding programs. On the other hand, grain yield and spikelet fertility of genotypes which were the soonest to reach 50% flowering within the drought imposition period, were the least adversely affected by drought. Then, timing of drought in relation to panicle emergence and to flowering appeared to be a more important cause of yield variation among genotypes than variation in Ds. |
Palavras-Chave: |
Fertilidade da espigueta; Fertility; Spikelets; Spikelets fertility. |
Thesagro: |
Arroz; Deficiência Hídrica; Entrenós; Espigueta; Fertilidade; Oryza Sativa. |
Thesaurus Nal: |
Internodes; Oryza sativa endornavirus; Rice. |
Categoria do assunto: |
-- F Plantas e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/18813/1/pab20_056.pdf
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Marc: |
LEADER 02449naa a2200337 a 4500 001 1208280 005 2022-04-07 008 2000 bl uuuu u00u1 u #d 022 $a0100-204X 024 7 $ahttps://doi.org/10.1590/S0100-204X2000001000004$2DOI 100 1 $aPINHEIRO, B. da S. 245 $aCarbon isotope discrimination and yield of upland rice as affected by drought at flowering. 260 $c2000 520 $aField experiments involving upland rice genotypes, sown in various dates in late season, were carried out to assess the relationship of carbon isotope discrimination with grain yield and drought resistance. In each one of the three years, one trial was kept under good water availability, while other suffered water shortage for a period of 18-23 days, encompassing panicle emergence and flowering. Drought stress reduced carbon isotope discrimination measured on soluble sugars (Ds) extracted from stem uppermost internode at the end of the imposition period, but had relatively less effect on bulk dry matter of leaves, sampled at the same period, or that of uppermost internodes and grains, sampled at harvest. The drought-induced reduction in Ds was accompanied of reduced spikelet fertility and grain yield. In the three trials subjected to drought, genotypes with the highest yield and spikelet fertility had the lowest Ds. However, this relationship was weak and it was concluded that Ds is not a sufficiently reliable indicator of rice drought resistance to be useful as a screening test in breeding programs. On the other hand, grain yield and spikelet fertility of genotypes which were the soonest to reach 50% flowering within the drought imposition period, were the least adversely affected by drought. Then, timing of drought in relation to panicle emergence and to flowering appeared to be a more important cause of yield variation among genotypes than variation in Ds. 650 $aInternodes 650 $aOryza sativa endornavirus 650 $aRice 650 $aArroz 650 $aDeficiência Hídrica 650 $aEntrenós 650 $aEspigueta 650 $aFertilidade 650 $aOryza Sativa 653 $aFertilidade da espigueta 653 $aFertility 653 $aSpikelets 653 $aSpikelets fertility 700 1 $aAUSTIN, R. B. 700 1 $aCARMO, M. P. do 700 1 $aHALL, M. A. 773 $tPesquisa Agropecuária Brasileira$gv. 35, n. 10, p. 1939-1947, out. 2000.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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9. | | CARVALHO, L. M. J. de; PEREIRA, E. de J.; FREITAS, S. C. de; CARVALHO, J. L. V. de; SANTOS, J. de O.; SIMAS, E. S.; ROCHA, M. de M.; CARDOSO, F.; FIGUEIREDO, R. E. P. Efeito do tratamento térmico sobre a bioacessibilidade de ferro e zinco em feijão-caupi (Vigna unguiculata (L.) Walp.). In: REUNIÃO DE BIOFORTIFICAÇÃO NO BRASIL, 5., 2015, São Paulo. Anais... Brasília, DF: Embrapa, 2015. p. 32-35 T202. Título equivalente: Heat process effect on iron and zinc bioavailability in cowpea (vigna unguiculata (l.) Walp.).Tipo: Artigo em Anais de Congresso |
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Biblioteca(s): Embrapa Clima Temperado. |
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18. | | BATISTA, R. de S.; OLIVEIRA, L. O. F. de; GOMES, R. da C.; COSTA, T. G.; CARAMALAC, L. S.; ARAÚJO, T. L. A. C.; NOGUEIRA, E.; SILVA, J. C. B.; OLIVEIRA, L. F. Suplementação de novilhos cruzados na transição de pasto safrinha para pasto convencional. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 14., 2018, Campo Grande - MS. [Resumos dos trabalhos]. Brasília, DF, Embrapa, 2018 115 p. (Embrapa Gado de Corte. Documentos, 258). P. 96-97Biblioteca(s): Embrapa Gado de Corte. |
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19. | | HUNGRIA, M.; NICOLAS, M. F.; GUIMARAES, C. T.; JARDIM, S. N.; GOMES, E. A.; VASCONCELOS, A. T. R. de. Tolerance to stress and environmental adaptability of Chromobacterium violaceum. Genetics and Molecular Research, Ribeirão Preto, v. 3, n. 1, p. 102-116, 2004.Tipo: Artigo em Periódico Indexado |
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Registros recuperados : 20 | |
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