Desiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germination

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dc.contributor.authorCorsato, Jaqueline Malagutti [UNESP]
dc.contributor.authorFerreira, Gisela [UNESP]
dc.contributor.authorBarbedo, Claudio Jose
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:27:05Z
dc.date.available2014-05-27T11:27:05Z
dc.date.issued2012-10-01
dc.description.abstractAnnona emarginata (Schldtl.) H. Rainer (araticum-de-terra-fria) is used as a rootstock for several species of Annonaceae. It is suggested that these seeds should be sown immediately after extraction and, therefore, they could be intolerant to desiccation. There are several mechanisms involved with desiccation tolerance. Soluble sugars, for example, can accumulate and act as osmoprotectants for the membrane system during desiccation. The aim of this study is to assess desiccation tolerance in A. emarginata seeds. In addition, we examined the soluble sugars involved in desiccation tolerance. Finally, we determined the effect of gibberellic acid (GA4+7) and N-(phenylmethyl)-aminopurine in promoting the germination of seeds with different water contents. The experiment consisted of a randomized 4×5 factorial design (desiccation levels × concentration of growth regulators). After drying, seeds containing 31 (control), 19, 12 and 5% water were incubated in different concentrations of GA4+7 N-(phenylmethyl)-aminopurine (0, 250, 500, 750 and 1000 mg L-1) for 60 hours. The experiment was conducted in a germination chamber with alternating temperature and photoperiod of 20oC for 18 hours of darkness and 30oC for 6 hours of light. We analyzed electrical conductivity, germination rate, mean germination time, germination speed, frequency and uniformity of germination, percentage of dormant seeds and soluble sugar profile in intact seeds through high-performance liquid chromatography (HPLC). The data were subjected to analysis of variance, and the means were compared using Tukey's test at a threshold of p<0.05. The results showed that seeds of A. emarginata appears to be desiccation tolerant and, also, that sucrose increases when seed water content is reduced to values as low as 12%, exogenous GA4+7+N-(phenylmethyl)-aminopurine improves its germinability.en
dc.description.affiliationBotany Department of the Biosciences Institute Universidade Estadual de São Paulo (UNESP), Botucatu, SP
dc.description.affiliationDepartment of the Institute of Botany, São Paulo, SP
dc.description.affiliationUnespBotany Department of the Biosciences Institute Universidade Estadual de São Paulo (UNESP), Botucatu, SP
dc.format.extent253-260
dc.identifierhttp://dx.doi.org/10.1590/S1677-04202012000400004
dc.identifier.citationBrazilian Journal of Plant Physiology, v. 24, n. 4, p. 253-260, 2012.
dc.identifier.doi10.1590/S1677-04202012000400004
dc.identifier.file2-s2.0-84876003250.pdf
dc.identifier.issn1677-0420
dc.identifier.issn1677-9452
dc.identifier.lattes9804707674172774
dc.identifier.scieloS1677-04202012000400004
dc.identifier.scopus2-s2.0-84876003250
dc.identifier.urihttp://hdl.handle.net/11449/73623
dc.language.isoeng
dc.relation.ispartofBrazilian Journal of Plant Physiology
dc.relation.ispartofsjr0,123
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAraticum-de-terra-fria
dc.subjectCytokinins
dc.subjectDesiccation
dc.subjectGibberellins
dc.subjectSoluble sugars
dc.titleDesiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germinationen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/bjpp/iaboutj.htm
unesp.author.lattes9804707674172774
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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