Environmental effects on photosynthetic capacity of bean genotypes

Detalhes bibliográficos
Autor(a) principal: Ribeiro, Rafael Vasconcelos
Data de Publicação: 2004
Outros Autores: dos Santos, Mauro Guida, Souza, Gustavo Maia, Machado, Eduardo Caruso, de Oliveira, Ricardo Ferraz, Angelocci, Luiz Roberto, Pimentel, Carlos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/6817
Resumo: Photosynthetic responses to daily environmental changes were studied in bean (Phaseolus vulgaris L.) genotypes ‘Carioca’, ‘Ouro Negro’, and Guarumbé. Light response curves of CO2 assimilation and stomatal conductance (gs) were also evaluated under controlled (optimum) environmental condition. Under this condition, CO2 assimilation of ‘Carioca’ was not saturated at 2,000 mol m-2 s-1, whereas Guarumbé and ‘Ouro Negro’ exhibited different levels of light saturation. All genotypes showed dynamic photoinhibition and reversible increase in the minimum chlorophyll fluorescence yield under natural condition, as well as lower photosynthetic capacity when compared with optimum environmental condition. Since differences in gs were not observed between natural and controlled conditions for Guarumbé and ‘Ouro Negro’, the lower photosynthetic capacity of these genotypes under natural condition seems to be caused by high temperature effects on biochemical reactions, as suggested by increased alternative electron sinks. The highest gs values of ‘Carioca’ were observed at controlled condition, providing evidences that reduction of photosynthetic capacity at natural condition was due to low gs in addition to the high temperature effects on the photosynthetic apparatus. ‘Carioca’ exhibited the highest photosynthetic rates under optimum environmental condition, and was more affected by daily changes of air temperature and leaf-to-air vapor pressure difference.
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spelling Environmental effects on photosynthetic capacity of bean genotypesEfeitos ambientais na capacidade fotossintética de genótipos de feijoeiroPhaseolus vulgaris; chlorophyll fluorescence; gas exchange; photosynthesisPhaseolus vulgaris; fluorescência de clorofila; fotossíntese; trocas gasosasPhotosynthetic responses to daily environmental changes were studied in bean (Phaseolus vulgaris L.) genotypes ‘Carioca’, ‘Ouro Negro’, and Guarumbé. Light response curves of CO2 assimilation and stomatal conductance (gs) were also evaluated under controlled (optimum) environmental condition. Under this condition, CO2 assimilation of ‘Carioca’ was not saturated at 2,000 mol m-2 s-1, whereas Guarumbé and ‘Ouro Negro’ exhibited different levels of light saturation. All genotypes showed dynamic photoinhibition and reversible increase in the minimum chlorophyll fluorescence yield under natural condition, as well as lower photosynthetic capacity when compared with optimum environmental condition. Since differences in gs were not observed between natural and controlled conditions for Guarumbé and ‘Ouro Negro’, the lower photosynthetic capacity of these genotypes under natural condition seems to be caused by high temperature effects on biochemical reactions, as suggested by increased alternative electron sinks. The highest gs values of ‘Carioca’ were observed at controlled condition, providing evidences that reduction of photosynthetic capacity at natural condition was due to low gs in addition to the high temperature effects on the photosynthetic apparatus. ‘Carioca’ exhibited the highest photosynthetic rates under optimum environmental condition, and was more affected by daily changes of air temperature and leaf-to-air vapor pressure difference.Foram avaliadas as respostas fotossintéticas às variações diárias do ambiente nos genótipos de feijoeiro (Phaseolus vulgaris L.) ‘Carioca’, ‘Ouro Negro’ e Guarumbé. Curvas de resposta da assimilação de CO2 e condutância estomática (gs) à luz foram realizadas em condição ambiental controlada (ótima). Nessa condição a assimilação de CO2 de ‘Carioca’ não foi saturada mesmo a 2.000 mol m-2 s-1, enquanto Guarumbé e ‘Ouro Negro’ apresentaram diferentes níveis de saturação lumínica. Os genótipos mostraram fotoinibição dinâmica e aumento reversível da fluorescência mínima da clorofila em condição natural, assim como menor capacidade fotosintética quando comparada à sob condição controlada. Uma vez que Guarumbé e ‘Ouro Negro’ apresentaram valores similares de gs em ambas condições ambientais, a menor capacidade fotossintética desses genótipos sob condição natural parece ser causada pelos efeitos da alta temperatura nas reações bioquímicas, como sugerido pelo aumento dos drenos alternativos de elétrons. Os maiores valores de gs em ‘Carioca’ foram observados em condição controlada, podendo a redução da capacidade fotossintética em condição natural ser atribuída aos baixos valores de gs em adição aos efeitos da alta temperatura no aparato fotossintético. ‘Carioca’ exibiu as maiores taxas fotossintéticas em condições ambientais ótimas, sendo mais afetado pelas mudanças diárias de temperatura do ar e diferença de pressão de vapor folha-ar.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraRibeiro, Rafael Vasconcelosdos Santos, Mauro GuidaSouza, Gustavo MaiaMachado, Eduardo Carusode Oliveira, Ricardo FerrazAngelocci, Luiz RobertoPimentel, Carlos2004-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6817Pesquisa Agropecuaria Brasileira; v.39, n.7, jul. 2004; 615-623Pesquisa Agropecuária Brasileira; v.39, n.7, jul. 2004; 615-6231678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/6817/3873info:eu-repo/semantics/openAccess2014-07-22T19:57:15Zoai:ojs.seer.sct.embrapa.br:article/6817Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-07-22T19:57:15Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Environmental effects on photosynthetic capacity of bean genotypes
Efeitos ambientais na capacidade fotossintética de genótipos de feijoeiro
title Environmental effects on photosynthetic capacity of bean genotypes
spellingShingle Environmental effects on photosynthetic capacity of bean genotypes
Ribeiro, Rafael Vasconcelos
Phaseolus vulgaris; chlorophyll fluorescence; gas exchange; photosynthesis
Phaseolus vulgaris; fluorescência de clorofila; fotossíntese; trocas gasosas
title_short Environmental effects on photosynthetic capacity of bean genotypes
title_full Environmental effects on photosynthetic capacity of bean genotypes
title_fullStr Environmental effects on photosynthetic capacity of bean genotypes
title_full_unstemmed Environmental effects on photosynthetic capacity of bean genotypes
title_sort Environmental effects on photosynthetic capacity of bean genotypes
author Ribeiro, Rafael Vasconcelos
author_facet Ribeiro, Rafael Vasconcelos
dos Santos, Mauro Guida
Souza, Gustavo Maia
Machado, Eduardo Caruso
de Oliveira, Ricardo Ferraz
Angelocci, Luiz Roberto
Pimentel, Carlos
author_role author
author2 dos Santos, Mauro Guida
Souza, Gustavo Maia
Machado, Eduardo Caruso
de Oliveira, Ricardo Ferraz
Angelocci, Luiz Roberto
Pimentel, Carlos
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Ribeiro, Rafael Vasconcelos
dos Santos, Mauro Guida
Souza, Gustavo Maia
Machado, Eduardo Caruso
de Oliveira, Ricardo Ferraz
Angelocci, Luiz Roberto
Pimentel, Carlos
dc.subject.por.fl_str_mv Phaseolus vulgaris; chlorophyll fluorescence; gas exchange; photosynthesis
Phaseolus vulgaris; fluorescência de clorofila; fotossíntese; trocas gasosas
topic Phaseolus vulgaris; chlorophyll fluorescence; gas exchange; photosynthesis
Phaseolus vulgaris; fluorescência de clorofila; fotossíntese; trocas gasosas
description Photosynthetic responses to daily environmental changes were studied in bean (Phaseolus vulgaris L.) genotypes ‘Carioca’, ‘Ouro Negro’, and Guarumbé. Light response curves of CO2 assimilation and stomatal conductance (gs) were also evaluated under controlled (optimum) environmental condition. Under this condition, CO2 assimilation of ‘Carioca’ was not saturated at 2,000 mol m-2 s-1, whereas Guarumbé and ‘Ouro Negro’ exhibited different levels of light saturation. All genotypes showed dynamic photoinhibition and reversible increase in the minimum chlorophyll fluorescence yield under natural condition, as well as lower photosynthetic capacity when compared with optimum environmental condition. Since differences in gs were not observed between natural and controlled conditions for Guarumbé and ‘Ouro Negro’, the lower photosynthetic capacity of these genotypes under natural condition seems to be caused by high temperature effects on biochemical reactions, as suggested by increased alternative electron sinks. The highest gs values of ‘Carioca’ were observed at controlled condition, providing evidences that reduction of photosynthetic capacity at natural condition was due to low gs in addition to the high temperature effects on the photosynthetic apparatus. ‘Carioca’ exhibited the highest photosynthetic rates under optimum environmental condition, and was more affected by daily changes of air temperature and leaf-to-air vapor pressure difference.
publishDate 2004
dc.date.none.fl_str_mv 2004-07-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6817
url https://seer.sct.embrapa.br/index.php/pab/article/view/6817
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6817/3873
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.39, n.7, jul. 2004; 615-623
Pesquisa Agropecuária Brasileira; v.39, n.7, jul. 2004; 615-623
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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