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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Clima Temperado. |
Data corrente: |
23/03/2016 |
Data da última atualização: |
16/02/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
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. |
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. |
Título: |
Impact of Supra-Optimal Temperatures on Physiology and Yield in Rice Field. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of Agricultural Science, v. 8, n. 2, p. 27-37, 2016. |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Carbon isotope discrimination; High-temperature; Oryza Sativa L; Rice gas exchange. |
Thesagro: |
Arroz; Carbono; Fisiologia; Oryza sativa. |
Thesaurus Nal: |
Carbon; Gas exchange; heat tolerance; Heat treatment; Isotopes; Rice. |
Categoria do assunto: |
-- S Ciências Biológicas |
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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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
22/08/2013 |
Data da última atualização: |
27/10/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
SANTOS, A. M. dos; GALVINCIO, J. D.; MOURA, M. S. B. de. |
Afiliação: |
ANTONIO MARCOS DOS SANTOS, UPE; JOSICLEDA DOMICIANO GALVINCIO, UPE; MAGNA SOELMA BESERRA DE MOURA, CPATSA. |
Título: |
Mudanças climáticas e o escoamento superficial na bacia hidrográfica do rio Goiana - Pernambuco - Brasil. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Investigaciones Geográficas, Instituto de Geografia, Universidad Nacional Autónoma de México, 81 p. 51-65, 2013. |
ISSN: |
0188-4611 |
Idioma: |
Português |
Conteúdo: |
O objetivo deste estudo é projetar e analisar o comportamento do escoamento superficial na bacia hidrográfica do rio Goiana frente aos cenários de mudanças climáticas B2 e A2. As simulações foram desenvolvidas através do modelo hidrológico semi-distribuído simples de dois parâmetros e a temperatura média mensal do ar, representando os cenários de mudanças climáticas, foi projetada pelo modelo climático regional Providing Regional Climates for Impacts Studies (PRECIS). |
Palavras-Chave: |
Escoamento superficial; Mudanças Climáticas; Natural resource; Recursos hídricos; Rio Goiana. |
Thesagro: |
Bacia Hidrográfica; Clima; Recurso natural. |
Thesaurus NAL: |
Climate; Natural resources. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/88352/1/Magna-2013.pdf
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Marc: |
LEADER 01376naa a2200277 a 4500 001 1964559 005 2023-10-27 008 2013 bl uuuu u00u1 u #d 022 $a0188-4611 100 1 $aSANTOS, A. M. dos 245 $aMudanças climáticas e o escoamento superficial na bacia hidrográfica do rio Goiana - Pernambuco - Brasil.$h[electronic resource] 260 $c2013 520 $aO objetivo deste estudo é projetar e analisar o comportamento do escoamento superficial na bacia hidrográfica do rio Goiana frente aos cenários de mudanças climáticas B2 e A2. As simulações foram desenvolvidas através do modelo hidrológico semi-distribuído simples de dois parâmetros e a temperatura média mensal do ar, representando os cenários de mudanças climáticas, foi projetada pelo modelo climático regional Providing Regional Climates for Impacts Studies (PRECIS). 650 $aClimate 650 $aNatural resources 650 $aBacia Hidrográfica 650 $aClima 650 $aRecurso natural 653 $aEscoamento superficial 653 $aMudanças Climáticas 653 $aNatural resource 653 $aRecursos hídricos 653 $aRio Goiana 700 1 $aGALVINCIO, J. D. 700 1 $aMOURA, M. S. B. de 773 $tInvestigaciones Geográficas, Instituto de Geografia, Universidad Nacional Autónoma de México, 81 p. 51-65, 2013.
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Embrapa Semiárido (CPATSA) |
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