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dc.contributor.authorLAVINSKY, A. O.pt_BR
dc.contributor.authorMAGALHAES, P. C.pt_BR
dc.contributor.authorÁVILA, R.pt_BR
dc.contributor.authorGOMES JUNIOR, C. C.pt_BR
dc.contributor.authorCARNEIRO, N. P.pt_BR
dc.date.accessioned2016-01-29T11:11:11Zpt_BR
dc.date.available2016-01-29T11:11:11Zpt_BR
dc.date.created2016-01-29pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationAdvances in Crop Science and Technology, p. 1-6, 2015.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1035552pt_BR
dc.descriptionWe test if maize maintain yield under long-term drought throught improvement of photosyntheis (A) coupled with up-regulation of the antioxidant system induced by increase in levels of abscisic acid (ABA). Four maize genotypes with constrasting drought tolerance: BRS1010 and 2B710 (sensitive) and DKB 390 and BRS1055 (tolerant) in two soil water levels, field capacity (FC) and water deficit (WD) were used. WD was applied at the pre-flowering stage for 12 days, and oxidative damage was measured as malondialdehyde (MDA) accumulation in whole plant. Plants from tolerant genotypes DKB390 and BRS1055 showed higher A and had no signal of oxidative damage compared to sensitive genotypes 2B710 and BRS1010 under WD, resulting in a higher yield attributes. For our surprising, it was dissociated from up-regulation of the antioxidant system ABA-mediated. In turn, plants from two sensitive genotypes under WD showed compared to FC consistent reduction of A due to mesophyll conductance (gm) limitation. Only WD plants from sensitive genotype BRS1010 presented leaf ABA levels increased related to its counterparts under FC; however, due to the inactivation of catalase activity the oxidative damage control was not effective, resulting a hardly MDA acumulation in both leaves and roots. The maize tolerance under long-term drought is linked to scape of gm decline.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectMesofilo condutânciapt_BR
dc.subjectFotorrespiraçãopt_BR
dc.subjectSistema antioxidantept_BR
dc.titleAnalysis of maize photosyntheis parameters and whole plant oxidative damage under long-term drought.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-02-24T11:11:11Zpt_BR
dc.subject.thesagroMilhopt_BR
dc.subject.thesagroFotossíntesept_BR
dc.subject.thesagroÁcido abscísicopt_BR
riaa.ainfo.id1035552pt_BR
riaa.ainfo.lastupdate2016-02-24pt_BR
dc.identifier.doihttp://dx.doi.org/10.4172/2329-8863.S1-007pt_BR
dc.contributor.institutionPAULO CESAR MAGALHAES, CNPMS; NEWTON PORTILHO CARNEIRO, CNPMS.pt_BR
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