Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions

Detalhes bibliográficos
Autor(a) principal: Falqueto,Antelmo Ralph
Data de Publicação: 2008
Outros Autores: Silva,Diolina Moura, Fontes,Renata Venturim
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Árvore (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-67622008000300018
Resumo: In mature mangrove plants Rhizophora mangle L. and Laguncularia racemosa Gaerth. growing under field conditions, photosystem 2 (PS2) photochemical efficiency, determined by the ratio of variable to maximum fluorescence (Fν/Fm), increased during the day in response to salinity in the rainy seasons. During the dry season, fluorescence values (Fo) were higher than those observed in rainy season. In addition, Fo decreased during the day in both season and species, except for R. mangle during the dry season. A positive correlation among Fν/Fm and salinity values was obtained for R. mangle and L. Racemosa during the dry and rainy seasons, showing that photosynthetic performance is maintained in both species under high salinities. Carotenoid content was higher in L. Racemosa in both seasons, which represents an additional mechanism against damage to the photosynthetic machinery. The chlorophyll content was not affected by salinity in either species.
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spelling Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditionschlorophyll fluorescencephotosynthetic pigmentsphotosystemIn mature mangrove plants Rhizophora mangle L. and Laguncularia racemosa Gaerth. growing under field conditions, photosystem 2 (PS2) photochemical efficiency, determined by the ratio of variable to maximum fluorescence (Fν/Fm), increased during the day in response to salinity in the rainy seasons. During the dry season, fluorescence values (Fo) were higher than those observed in rainy season. In addition, Fo decreased during the day in both season and species, except for R. mangle during the dry season. A positive correlation among Fν/Fm and salinity values was obtained for R. mangle and L. Racemosa during the dry and rainy seasons, showing that photosynthetic performance is maintained in both species under high salinities. Carotenoid content was higher in L. Racemosa in both seasons, which represents an additional mechanism against damage to the photosynthetic machinery. The chlorophyll content was not affected by salinity in either species.Sociedade de Investigações Florestais2008-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-67622008000300018Revista Árvore v.32 n.3 2008reponame:Revista Árvore (Online)instname:Universidade Federal de Viçosa (UFV)instacron:SIF10.1590/S0100-67622008000300018info:eu-repo/semantics/openAccessFalqueto,Antelmo RalphSilva,Diolina MouraFontes,Renata Venturimeng2008-11-13T00:00:00Zoai:scielo:S0100-67622008000300018Revistahttp://www.scielo.br/revistas/rarv/iaboutj.htmPUBhttps://old.scielo.br/oai/scielo-oai.php||r.arvore@ufv.br1806-90880100-6762opendoar:2008-11-13T00:00Revista Árvore (Online) - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
title Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
spellingShingle Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
Falqueto,Antelmo Ralph
chlorophyll fluorescence
photosynthetic pigments
photosystem
title_short Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
title_full Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
title_fullStr Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
title_full_unstemmed Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
title_sort Photosynthetic performance of mangroves Rhizophora mangle and Laguncularia racemosa under field conditions
author Falqueto,Antelmo Ralph
author_facet Falqueto,Antelmo Ralph
Silva,Diolina Moura
Fontes,Renata Venturim
author_role author
author2 Silva,Diolina Moura
Fontes,Renata Venturim
author2_role author
author
dc.contributor.author.fl_str_mv Falqueto,Antelmo Ralph
Silva,Diolina Moura
Fontes,Renata Venturim
dc.subject.por.fl_str_mv chlorophyll fluorescence
photosynthetic pigments
photosystem
topic chlorophyll fluorescence
photosynthetic pigments
photosystem
description In mature mangrove plants Rhizophora mangle L. and Laguncularia racemosa Gaerth. growing under field conditions, photosystem 2 (PS2) photochemical efficiency, determined by the ratio of variable to maximum fluorescence (Fν/Fm), increased during the day in response to salinity in the rainy seasons. During the dry season, fluorescence values (Fo) were higher than those observed in rainy season. In addition, Fo decreased during the day in both season and species, except for R. mangle during the dry season. A positive correlation among Fν/Fm and salinity values was obtained for R. mangle and L. Racemosa during the dry and rainy seasons, showing that photosynthetic performance is maintained in both species under high salinities. Carotenoid content was higher in L. Racemosa in both seasons, which represents an additional mechanism against damage to the photosynthetic machinery. The chlorophyll content was not affected by salinity in either species.
publishDate 2008
dc.date.none.fl_str_mv 2008-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-67622008000300018
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-67622008000300018
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-67622008000300018
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade de Investigações Florestais
publisher.none.fl_str_mv Sociedade de Investigações Florestais
dc.source.none.fl_str_mv Revista Árvore v.32 n.3 2008
reponame:Revista Árvore (Online)
instname:Universidade Federal de Viçosa (UFV)
instacron:SIF
instname_str Universidade Federal de Viçosa (UFV)
instacron_str SIF
institution SIF
reponame_str Revista Árvore (Online)
collection Revista Árvore (Online)
repository.name.fl_str_mv Revista Árvore (Online) - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv ||r.arvore@ufv.br
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