Análise da dependência térmica da germinação de braquiarão utilizando o modelo tempo térmico

dc.contributor.authorNakao, E. A. [UNESP]
dc.contributor.authorCardoso, V. J.M. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T16:41:13Z
dc.date.available2018-12-11T16:41:13Z
dc.date.issued2016-02-01
dc.description.abstractThis paper analyzed the thermal dependence on the germination of Urochloa brizantha (Stapf) Webster seeds under constant and fluctuating temperatures through the thermal time model. Germination tests were carried out at constant temperatures ranging from 8 °C to 41.5 °C in order to determine the model parameters: base (Tb), optimal (To) and maximum temperature (Tc) for germination; and the thermal time (θT) required for individual seeds to germinate. Braquiarao seeds germinate within a temperature interval from 8 °C to 41.5 °C, with an optimum range for germination estimated at 31.5 ° ≤ T ≤ 34.5 °C. Actual and expected distributions of cumulative germination percentages of U. brizantha seeds put to germinate both under controlled and uncontrolled temperature regimes were compared, and it can be seen that the model described relatively well the germination at isothermal assays; however the model failed to predict germination at a wide range of thermal fluctuations. Possible explanations for the results are discussed.en
dc.description.affiliationGrupo de Ecofisiologia de Sementes Laboratório de Fisiologia Vegetal Departamento de Botânica Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Avenida 24A, 1515
dc.description.affiliationUnespGrupo de Ecofisiologia de Sementes Laboratório de Fisiologia Vegetal Departamento de Botânica Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Avenida 24A, 1515
dc.format.extent162-168
dc.identifierhttp://dx.doi.org/10.1590/1519-6984.15714
dc.identifier.citationBrazilian Journal of Biology, v. 76, n. 1, p. 162-168, 2016.
dc.identifier.doi10.1590/1519-6984.15714
dc.identifier.fileS1519-69842016000100162.pdf
dc.identifier.issn1678-4375
dc.identifier.issn1519-6984
dc.identifier.scieloS1519-69842016000100162
dc.identifier.scopus2-s2.0-84959244834
dc.identifier.urihttp://hdl.handle.net/11449/168424
dc.language.isoeng
dc.relation.ispartofBrazilian Journal of Biology
dc.relation.ispartofsjr0,523
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDegrees-day
dc.subjectTemperature
dc.subjectUrochloa brizantha
dc.titleAnálise da dependência térmica da germinação de braquiarão utilizando o modelo tempo térmicopt
dc.title.alternativeAnalysis of thermal dependence on the germination of braquiarão seeds using the thermal time modelen
dc.typeArtigo

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