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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampRibeiro, Rafael Vasconcelos-
dc.typeArtigopt_BR
dc.titlePhotosynthetic and antioxidant responses to drought during sugarcane ripeningpt_BR
dc.contributor.authorSales, C. R. G.-
dc.contributor.authorMarchiori, P. E. R.-
dc.contributor.authorMachado, R. S.-
dc.contributor.authorFontenele, A. V.-
dc.contributor.authorMachado, E. C.-
dc.contributor.authorSilveira, J. A. G.-
dc.contributor.authorRibeiro, R. V.-
dc.subjectEstresse oxidativopt_BR
dc.subject.otherlanguageOxidative stresspt_BR
dc.description.abstractWater deficit is an important exogenous factor that enhances the influx of sucrose into sugarcane (Saccharum spp.) stem internodes during ripening, when photosynthetic ability in supplying sinks is essential. The aim of this study was to test the hypothesis that drought tolerance in sugarcane is associated with an effective antioxidant protection during the ripening phase that might maintain a favorable redox balance in chloroplasts and protect photosynthesis under drought conditions. Two commercial sugarcane varieties, IACSP94-2094 (tolerant) and IACSP96-2042 (sensitive), with contrasting behavior under water deficit, were subjected to water withholding during the ripening stage. Our results revealed that the tolerant variety was less affected by water deficit, maintaining hotosynthesis for a longer period and showing a faster recovery after rehydration as compared to the sensitive one. As consequence, the tolerant variety faced lesser excess of light energy at PSII. The maintenance of photosynthesis under water deficit and its fast recovery after rehydration resulted in the lower leaf H2O2 concentration and favorable redox status in the drought-tolerant genotype, which was associated with stimulation of superoxide dismutase during ripening. Our results also revealed that ferric superoxide dismutase isoforms were strongly enhanced under drought conditions, playing an important role in chloroplast redox homeostasispt_BR
dc.relation.ispartofPhotosynthetica: international journal for photosynthesis researchpt_BR
dc.relation.ispartofabbreviationPhotosyntheticapt_BR
dc.publisher.cityPraguept_BR
dc.publisher.countryRepública Tchecapt_BR
dc.publisherAkademie Ved Ceske Republiky/Ustav Experimentalni Botanikypt_BR
dc.date.issued2015-
dc.language.isoengpt_BR
dc.description.volume53pt_BR
dc.description.issuenumber4pt_BR
dc.description.firstpage547pt_BR
dc.description.lastpage554pt_BR
dc.rightsAbertopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0300-3604pt_BR
dc.identifier.eissn1573-9058pt_BR
dc.identifier.doi10.1007/s11099-015-0146-xpt_BR
dc.identifier.urlhttp://ps.ueb.cas.cz/artkey/phs-201504-0008_photosynthetic-and-antioxidant-responses-to-drought-during-sugarcane-ripening.phppt_BR
dc.date.available2021-01-28T19:51:53Z-
dc.date.accessioned2021-01-28T19:51:53Z-
dc.description.provenanceSubmitted by Mariana Aparecida Azevedo (mary1@unicamp.br) on 2021-01-28T19:51:53Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-02-16T19:31:24Z : No. of bitstreams: 1 000363248600008.pdf: 1378289 bytes, checksum: 124d42466bba320f315a501867a9e091 (MD5)en
dc.description.provenanceMade available in DSpace on 2021-01-28T19:51:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2015en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/354910-
dc.contributor.departmentDepartamento de Biologia Vegetalpt_BR
dc.contributor.unidadeInstituto de Biologiapt_BR
dc.subject.keywordChlorophyll fluorescencept_BR
dc.subject.keywordLeaf gas exchangpt_BR
dc.subject.keywordWater stresspt_BR
dc.identifier.source000363248600008pt_BR
dc.creator.orcid0000-0002-1148-6777pt_BR
dc.type.formArtigopt_BR
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