Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/577924
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dc.contributor.authorSILVA, E. C.pt_BR
dc.contributor.authorNOGUEIRA, R. J. M. C.pt_BR
dc.contributor.authorVALE, F. H. A.pt_BR
dc.contributor.authorARAUJO, F. P. dept_BR
dc.contributor.authorPIMENTA, M. A.pt_BR
dc.date.accessioned2011-04-09T20:58:04Z-
dc.date.available2011-04-09T20:58:04Z-
dc.date.created2009-12-14pt_BR
dc.date.issued2009pt_BR
dc.identifier.citationBrazilian Journal of Plant Physiology, Campos dos Goytacazes, v. 21, n. 1, p. 33-42, 2009.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/577924pt_BR
dc.descriptionTranspiration (E), diffusive resistance (rs) and anatomical parameters were measured in plants of four grafted umbu tree genotypes (GBUs 44, 48, 50 and 68) in order to evaluate alterations induced by intermittent drought and possible genotypic variations. Transpiration measurements were taken daily until stomatal closure by withholding water. Measurements were also taken, when the plants were re-watered and the watering was interrupted again. This cycle was repeated for a period of 31 days (stress period). The control plants were also irrigated daily. A regular pattern in the stomatal opening/closing mechanism was observed throughout the watering period, exhibiting intra-specific differences. Stomatal behavior of GBU 44 and GBU 68 were influenced by air temperature (Tar), relative humidity (RH) and vapor pressure deficit (VPD), whereas GBU 50 was influenced by photosynthetically active radiation (PAR). GBU 48 was not influenced by these environmental factors. Anatomical alterations in response to drought were observed in stomatal density (SD), reductions in the stomatal index (SI) and stomatal aperture size (SA). The anatomical features of the GBU 48 genotype remained unaltered. There was an inversion in tissue proportion in GBU 44 under stress conditions, reducing the spongy parenchyma and increasing palisade parenchyma thickness. The inverse occurred with GBU 68, while the remaining genotypes were unaltered. The results found in this study suggest that GBU 68 is the most drought-sensitive genotype and anatomical changes induced by intermittent drought are not enough to explain the physiological differences between genotypes.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectDensidade estomáticapt_BR
dc.subjectResistência difusivapt_BR
dc.subjectDéficit hídricopt_BR
dc.subjectTranspiraçãopt_BR
dc.subjectDiffusive resistancept_BR
dc.subjectStomatal densitypt_BR
dc.subjectWater deficitpt_BR
dc.titleStomatal changes induced by intermittent drought in four umbu tree genotypes.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-10-06T11:11:11Zpt_BR
dc.subject.thesagroUmbupt_BR
dc.subject.thesagroSpondias Tuberosapt_BR
dc.subject.nalthesaurusTranspirationpt_BR
riaa.ainfo.id577924pt_BR
riaa.ainfo.lastupdate2017-10-06 -03:00:00pt_BR
dc.contributor.institutionELIZOMAR C. SILVA; REJANE J. M. C. NOGUEIRA; FERNANDO H. A. VALE; FRANCISCO PINHEIRO DE ARAUJO, CPATSA; MARIANA A. PIMENTA.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CPATSA)

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