Irradiance stress responses of gas exchange and antioxidant enzyme contents in pariparoba [Pothomorphe umbellata (L.) Miq.] plants

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dc.contributor.authorMarchese, J. A.
dc.contributor.authorMattana, R. S. [UNESP]
dc.contributor.authorMing, L. C. [UNESP]
dc.contributor.authorBroetto, Fernando [UNESP]
dc.contributor.authorVendramini, P. F.
dc.contributor.authorMoraes, R. M.
dc.contributor.institutionParana Fed Univ Technol
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Miami
dc.contributor.institutionUniversity of Mississippi
dc.date.accessioned2014-05-20T15:32:52Z
dc.date.available2014-05-20T15:32:52Z
dc.date.issued2008-12-01
dc.description.abstractWe evaluated the growth and development of the medicinal species Pothomorphe umbellata ( L.) Miq. under different shade levels ( full sun and 30, 50, and 70 % shade, marked as I(100), I(70), I(50), and I(30), respectively) and their effects on gas exchange and activities of antioxidant enzymes. Photosynthetically active radiation varied from 1 254 mu mol m(-2) s(-1) at I(100) to 285 mu mol m(-2) s(-1) at I(30). Stomatal conductance, net photosynthetic rate, and relative chlorophyll (Chl) content were maximal in I(70) plants. Plants grown under I(100) produced leaves with lower Chl content and signs of chlorosis and necrosis. These symptoms indicated Chl degradation induced by the generation of reactive oxygen species. Stress related antioxidant enzyme activities ( Mn-SOD, Fe-SOD, and Cu/Zn-SOD) were highest in I(100) plants, whereas catalase activity was the lowest. Hence P. umbellata is a shade species ( sciophyte), a feature that should be considered in reforestation programs or in field plantings for production of medicinal constituents.en
dc.description.affiliationParana Fed Univ Technol, Agron Sch, BR-85503390 Pato Branco, PR, Brazil
dc.description.affiliationSão Paulo State Univ, Agron Sch, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationUniv Miami, Coral Gables, FL 33124 USA
dc.description.affiliationUniv Mississippi, Sch Pharm, Natl Ctr Nat Prod Res, University, MS 38677 USA
dc.description.affiliationUniv Mississippi, Ctr Water & Wetlands Resources, University, MS 38677 USA
dc.description.affiliationUnespSão Paulo State Univ, Agron Sch, BR-18603970 Botucatu, SP, Brazil
dc.format.extent501-505
dc.identifierhttp://dx.doi.org/10.1007/s11099-008-0085-x
dc.identifier.citationPhotosynthetica. Dordrecht: Springer, v. 46, n. 4, p. 501-505, 2008.
dc.identifier.doi10.1007/s11099-008-0085-x
dc.identifier.issn0300-3604
dc.identifier.lattes3964089477817663
dc.identifier.urihttp://hdl.handle.net/11449/41663
dc.identifier.wosWOS:000261579100003
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofPhotosynthetica
dc.relation.ispartofjcr1.740
dc.relation.ispartofsjr0,663
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectcatalaseen
dc.subjectchlorophyllen
dc.subjectoxidative stressen
dc.subjectphotosynthesisen
dc.subjectshade plantsen
dc.subjectstomatal conductanceen
dc.subjectsuperoxide dismutaseen
dc.subjecttranspiration rateen
dc.titleIrradiance stress responses of gas exchange and antioxidant enzyme contents in pariparoba [Pothomorphe umbellata (L.) Miq.] plantsen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes3964089477817663[4]
unesp.author.orcid0000-0002-8316-4144[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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Artigos - Química e Bioquímica - IBB