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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Clima Temperado. |
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Data corrente: |
23/03/2016 |
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Data da última atualização: |
16/02/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BRITO, G. G. de; FAGUNDES, P. R. R.; TELÓ, G. M.; ABREU, A. G. de; MAGALHAES JUNIOR, A. M. de; FRANCO, D. F.; ANDRES, A.; PARFITT, J. M. B.; KUHN, R. A.; PETRINI, J. A. |
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Afiliação: |
GIOVANI GREIGH DE BRITO, CPACT; PAULO RICARDO REIS FAGUNDES, CPACT; Gustavo Mack Teló; ALUANA GONCALVES DE ABREU, CNPAF; ARIANO MARTINS DE MAGALHAES JUNIOR, CPACT; DANIEL FERNANDEZ FRANCO, CPACT; ANDRE ANDRES, CPACT; JOSE MARIA BARBAT PARFITT, CPACT; RENATO AMARAL KUHN, CPACT; JOSE ALBERTO PETRINI, CPACT. |
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Título: |
Impact of Supra-Optimal Temperatures on Physiology and Yield in Rice Field. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v. 8, n. 2, p. 27-37, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
Heat stress is an increasing constraint for the productivity of rice (Oryza sativa L.) worldwide. In this context, a study was carry out to quantify the supra-optimal temperature effects on rice yield-components and secondly to investigate its effects on plant physiological attributes when different genetic backgrounds are submitted to contrasting environment air-temperatures during the anthesis, the most sensitive growth phase to heat stress. Three Embrapa's cultivars were used, BRS Pampa, BRS Sinuelo CL and IAS 12-9 Formosa which represent indica/japonica, indica and essentially japonica subspecies, respectively. One day before anthesis phase, sub plot plants were submitted to heat stress via polythene shelters for 96 h. Photosynthesis and respiration parameters were measured at 24 and 48 h after stress, and at physiological maturity, grain carbon isotope fractionation as well as yield components and grain yield were quantified. There were significant differences among genotypes for some gas exchange parameters at ambient and under increased temperatures at 24 and 48 h after stress, such as carbon assimilation and respiration rate. Heat-stress also affected yield components, especially for BRS Sinuelo CL showing the highest spikelet sterility (54%) while BRS Pampa had the lowest value (20.80%) and the highest 1000-grain weight and grain yield. These results demonstrate that although heat tolerance has been more frequently found in indica spp, this trait can also be present in genotypes combining indica/japonica genetic background, as shown by BRS Pampa cultivar. MenosHeat stress is an increasing constraint for the productivity of rice (Oryza sativa L.) worldwide. In this context, a study was carry out to quantify the supra-optimal temperature effects on rice yield-components and secondly to investigate its effects on plant physiological attributes when different genetic backgrounds are submitted to contrasting environment air-temperatures during the anthesis, the most sensitive growth phase to heat stress. Three Embrapa's cultivars were used, BRS Pampa, BRS Sinuelo CL and IAS 12-9 Formosa which represent indica/japonica, indica and essentially japonica subspecies, respectively. One day before anthesis phase, sub plot plants were submitted to heat stress via polythene shelters for 96 h. Photosynthesis and respiration parameters were measured at 24 and 48 h after stress, and at physiological maturity, grain carbon isotope fractionation as well as yield components and grain yield were quantified. There were significant differences among genotypes for some gas exchange parameters at ambient and under increased temperatures at 24 and 48 h after stress, such as carbon assimilation and respiration rate. Heat-stress also affected yield components, especially for BRS Sinuelo CL showing the highest spikelet sterility (54%) while BRS Pampa had the lowest value (20.80%) and the highest 1000-grain weight and grain yield. These results demonstrate that although heat tolerance has been more frequently found in indica spp, this trait can also be present... Mostrar Tudo |
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Palavras-Chave: |
Carbon isotope discrimination; High-temperature; Oryza Sativa L; Rice gas exchange. |
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Thesagro: |
Arroz; Carbono; Fisiologia; Oryza sativa. |
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Thesaurus Nal: |
Carbon; Gas exchange; heat tolerance; Heat treatment; Isotopes; Rice. |
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Categoria do assunto: |
--
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/155272/1/Giovani-Brito-et-al-2016-Journal-of-Agricultural-Science-Vol-8-n-2.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/141598/1/Giovani-AB-54904-f.pdf
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Marc: |
LEADER 02669naa a2200397 a 4500
001 2063485
005 2017-02-16
008 2016 bl uuuu u00u1 u #d
100 1 $aBRITO, G. G. de
245 $aImpact of Supra-Optimal Temperatures on Physiology and Yield in Rice Field.$h[electronic resource]
260 $c2016
520 $aHeat stress is an increasing constraint for the productivity of rice (Oryza sativa L.) worldwide. In this context, a study was carry out to quantify the supra-optimal temperature effects on rice yield-components and secondly to investigate its effects on plant physiological attributes when different genetic backgrounds are submitted to contrasting environment air-temperatures during the anthesis, the most sensitive growth phase to heat stress. Three Embrapa's cultivars were used, BRS Pampa, BRS Sinuelo CL and IAS 12-9 Formosa which represent indica/japonica, indica and essentially japonica subspecies, respectively. One day before anthesis phase, sub plot plants were submitted to heat stress via polythene shelters for 96 h. Photosynthesis and respiration parameters were measured at 24 and 48 h after stress, and at physiological maturity, grain carbon isotope fractionation as well as yield components and grain yield were quantified. There were significant differences among genotypes for some gas exchange parameters at ambient and under increased temperatures at 24 and 48 h after stress, such as carbon assimilation and respiration rate. Heat-stress also affected yield components, especially for BRS Sinuelo CL showing the highest spikelet sterility (54%) while BRS Pampa had the lowest value (20.80%) and the highest 1000-grain weight and grain yield. These results demonstrate that although heat tolerance has been more frequently found in indica spp, this trait can also be present in genotypes combining indica/japonica genetic background, as shown by BRS Pampa cultivar.
650 $aCarbon
650 $aGas exchange
650 $aheat tolerance
650 $aHeat treatment
650 $aIsotopes
650 $aRice
650 $aArroz
650 $aCarbono
650 $aFisiologia
650 $aOryza sativa
653 $aCarbon isotope discrimination
653 $aHigh-temperature
653 $aOryza Sativa L
653 $aRice gas exchange
700 1 $aFAGUNDES, P. R. R.
700 1 $aTELÓ, G. M.
700 1 $aABREU, A. G. de
700 1 $aMAGALHAES JUNIOR, A. M. de
700 1 $aFRANCO, D. F.
700 1 $aANDRES, A.
700 1 $aPARFITT, J. M. B.
700 1 $aKUHN, R. A.
700 1 $aPETRINI, J. A.
773 $tJournal of Agricultural Science$gv. 8, n. 2, p. 27-37, 2016.
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Registro original: |
Embrapa Clima Temperado (CPACT) |
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| Registros recuperados : 6 | |
| 3. |  | BANDEIRA, B. dos S.; ALVES, R. M.; FARIAS, D. C. R. Utilização do método de retrocruzamento no melhoramento do cupuaçuzeiro. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA UFRA, 4.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 10., 2007, Belém, PA. Anais... Belém, PA: UFRA: Embrapa Amazônia Oriental, 2007. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 4. | | BANDEIRA, B. dos S.; ALVES, R. M.; FARIAS, D. C. R. Utilização da tecnologia de substituição de copa para renovação de pomares de cupuaçuzeiro atacados com vassoura-de-bruxa. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA UFRA, 4.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 10., 2007, Belém, PA. Anais... Belém, PA: UFRA: Embrapa Amazônia Oriental, 2007. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 5. | | ALVES, R. M.; RESENDE, M. D. V. de; BANDEIRA, B. dos S.; PINHEIRO, T. M.; FARIAS, D. C. R. Avaliação e seleção de progênies de cupuaçuzeiro (Theobroma grandiflorum), em Belém, Pará. Revista Brasileira de Fruticultura, Jaboticabal, v. 32, n. 1, p. 204-212, mar. 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Florestas. |
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| 6. | | ALVES, R. M.; RESENDE, M. D. V. de; BANDEIRA, B. dos S.; PINHEIRO, T. M.; FARIAS, D. C. R. Evolução da vassoura-de-bruxa e avaliação da resistência em progênies de cupuaçuzeiro. Revista Brasileira de Fruticultura, Jaboticabal, v. 31, n. 4, p. 1022-1032, dez. 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Florestas. |
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| Registros recuperados : 6 | |
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