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dc.contributor.authorBarja, P. R.-
dc.contributor.authorMansanares, A. M.-
dc.contributor.authorDa Silva, E. C.-
dc.contributor.authorMagalhaes, ACN-
dc.contributor.authorAlves, PLCA-
dc.identifier.citationPhotosynthetica. Prague 6: Acad Sci Czech Republic, Inst Experimental Botany, v. 39, n. 4, p. 489-495, 2001.-
dc.description.abstractPhotosynthetic induction in leaves of four-month-old Eucalyptus urograndis seedlings and of cuttings obtained from adult trees that were previously dark-adapted was studied by the in vivo and in situ Open Photoacoustic Cell Technique, Results for the gas exchange component of the photoacoustic (PA) signal were interpreted considering that the gas uptake component would have a phase angle nearly opposite to that of the oxygen evolution component. By subtracting the thermal component from the total PA signal, we studied the competition between gas uptake and oxygen evolution during the photosynthetic induction. Seedlings presented a net oxygen evolution prior to cuttings, but cuttings reached a higher steady-state photosynthetic activity. The chlorophyll (Chl) a/b ratio and the Chl fluorescence induction characteristic F-v/F-m were significantly higher for cuttings, while there was no difference between samples in stomata density and leaf thickness. Thus the differences in PA signals of seedlings and cuttings are associated to differences between the photosystem 2 antenna systems of these samples.en
dc.publisherAcad Sci Czech Republic, Inst Experimental Botany-
dc.sourceWeb of Science-
dc.subjectchlorophyll fluorescencept
dc.subjectclone differencespt
dc.subjectgas uptakept
dc.subjectleaf thicknesspt
dc.subjectoxygen evolutionpt
dc.subjectphotobaric signalpt
dc.subjectphotothermal signalpt
dc.subjectstomata densitypt
dc.titlePhotosynthetic induction in Eucalyptus urograndis seedlings and cuttings measured by an open photoacoustic cellen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)-
dc.description.affiliationUNESP, FCAVJ, Dept Biol Aplicada, BR-14870000 Jaboticabal, SP, Brazil-
dc.description.affiliationUniv São Paulo, ESALQ, Dept Genet, BR-13400970 Piracicaba, SP, Brazil-
dc.description.affiliationUniv Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil-
dc.description.affiliationUniv Estadual Campinas, Inst Biol, BR-13083970 Campinas, SP, Brazil-
dc.description.affiliationUnespUNESP, FCAVJ, Dept Biol Aplicada, BR-14870000 Jaboticabal, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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