Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1041702
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorBRITO, G. G. dept_BR
dc.contributor.authorFAGUNDES, P. R. R.pt_BR
dc.contributor.authorTELÓ, G. M.pt_BR
dc.contributor.authorABREU, A. G. dept_BR
dc.contributor.authorMAGALHAES JUNIOR, A. M. dept_BR
dc.contributor.authorFRANCO, D. F.pt_BR
dc.contributor.authorANDRES, A.pt_BR
dc.contributor.authorPARFITT, J. M. B.pt_BR
dc.contributor.authorKUHN, R. A.pt_BR
dc.contributor.authorPETRINI, J. A.pt_BR
dc.date.accessioned2016-03-23T11:11:11Zpt_BR
dc.date.available2016-03-23T11:11:11Zpt_BR
dc.date.created2016-03-23pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationJournal of Agricultural Science, v. 8, n. 2, p. 27-37, 2016.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1041702pt_BR
dc.descriptionHeat 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.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectOryza Sativa Lpt_BR
dc.subjectCarbon isotope discriminationpt_BR
dc.subjectHigh-temperaturept_BR
dc.subjectRice gas exchangept_BR
dc.titleImpact of Supra-Optimal Temperatures on Physiology and Yield in Rice Field.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-02-07T11:11:11Zpt_BR
dc.subject.nalthesaurusheat tolerancept_BR
riaa.ainfo.id1041702pt_BR
riaa.ainfo.lastupdate2017-02-07pt_BR
dc.contributor.institutionGIOVANI GREIGH DE BRITO, CNPA; 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.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CPACT)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
GiovaniAB54904f.pdf7,14 MBAdobe PDFThumbnail
Visualizar/Abrir
Mostrar registro simples do item Visualizar estatísticas

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace