Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/578363
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dc.contributor.authorARAGÃO, D. V.pt_BR
dc.contributor.authorFORTINI, L. B.pt_BR
dc.contributor.authorMULKEY, S. S.pt_BR
dc.contributor.authorZARIN, D. J.pt_BR
dc.contributor.authorARAUJO, M. M.pt_BR
dc.contributor.authorCARVALHO, C. J. R. dept_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2009-12-18pt_BR
dc.date.issued2005pt_BR
dc.identifier.citationAmerican Journal of Botany, v. 92, n. 3, p. 456-461, Mar. 2005.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/578363pt_BR
dc.descriptionAlternative hypotheses were tested to explain a previously reported anomaly in the response of leaf photosynthetic capacity at light saturation (A..) in Miconia ciliata to dry-season irrigation. The anomaly is characterized by an abrupt increase in leaf A._ for nonirrigated plants at the onset of the rainy season to values that significantly exceeded corresponding measurements for plants that were irrigated during the previous dry season. Hypothesis I posits that a pulse in leaf nitrogen increases CO2 assimilation in nonirrigated plants at the onset of the wet season and is dampened for irrigated plants; this hypothesis was rejected because, although a wet-season nitrogen pulse did occur, it was identical for both irrigated and nonirrigated plants and was preceded by the increase in assimilation by nonirrigated plants. Hypothesis 2 posits that a reproduction-related, compensatory photosynthetic response occurs in nonirrigated plants following the onset of the wet season and is dampened in irrigated plants; consistent with hypothesis 2, high maximum assimilation rates for control plants in the wet season were significantly correlated with fruiting and flowering, whereas irrigation caused flowering and fruiting in the dry season, spreading M. ciliata reproductive activity in irrigated plants across the entire year.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectAmazonpt_BR
dc.subjectCompensatory photosynthesispt_BR
dc.subjectDrought seasonalitypt_BR
dc.subjectReprodutive phenologypt_BR
dc.subjectSecondary forestpt_BR
dc.titleCorrelation but no causation between leaf nitrogen and maximum assimilation: the role of drought and reproduction in gas exchange in an understory tropical plant Miconia ciliata (Melastomataceae).pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-11-28T11:11:11Zpt_BR
dc.subject.nalthesaurusnitrogen contentpt_BR
riaa.ainfo.id578363pt_BR
riaa.ainfo.lastupdate2016-11-28pt_BR
dc.identifier.doi10.3732/ajb.92.3.456pt_BR
dc.contributor.institutionDEBORA VEIGA ARAGÃO, UFRA; CLAUDIO JOSE REIS DE CARVALHO, CPATU.pt_BR
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