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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
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Data corrente: |
04/01/2001 |
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Data da última atualização: |
07/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PINHEIRO, B. da S.; AUSTIN, R. B.; CARMO, M. P. do; HALL, M. A. |
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Afiliação: |
BEATRIZ DA SILVEIRA PINHEIRO, CNPAF; ROGER BRIAN AUSTIN; MARIA PEREIRA DO CARMO; MICHAEL ALAN HALL. |
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Título: |
Carbon isotope discrimination and yield of upland rice as affected by drought at flowering. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 35, n. 10, p. 1939-1947, out. 2000. |
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ISSN: |
0100-204X |
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DOI: |
https://doi.org/10.1590/S0100-204X2000001000004 |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Fertilidade da espigueta; Fertility; Spikelets; Spikelets fertility. |
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Thesagro: |
Arroz; Deficiência Hídrica; Entrenós; Espigueta; Fertilidade; Oryza Sativa. |
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Thesaurus Nal: |
Internodes; Oryza sativa endornavirus; Rice. |
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Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
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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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| Registros recuperados : 65 | |
| 27. |  | PINHEIRO, B. da S.; KONRAD, M. L.; CARMO, M. P. do. Características morfológicas y fisiologicas relacionadas con el desempeno de arroz de secano asociado con Brachiaria brizantha. In: GUIMARÃES, E. P.; SANZ, J. I.; RAO, I. M.; AMÉZQUITA, M. C.; AMÉZQUITA, E. (Ed.). Sistemas agropastoriles en sabanas tropicales de América Latina. Cali: CIAT; Brasília, DF: Embrapa, 1999. p. 163-174.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 32. | | STONE, L. F.; MOREIRA, J. A. A.; PINHEIRO, B. da S.; OLIVEIRA, I. P. de. Consumo de água da consorciação arroz de terras altas Brachiaria brizantha em comparação com o arroz solteiro. In: CONGRESSO DA CADEIA PRODUTIVA DE ARROZ, 1.; REUNIÃO NACIONAL DE PESQUISA DE ARROZ - RENAPA, 7., 2002, Florianópolis. Anais... Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2002. p. 328-330. (Embrapa Arroz e Feijão. Documentos, 134).| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 65 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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