Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions

Detalhes bibliográficos
Autor(a) principal: Pita, Francisco Antonio Oliveira
Data de Publicação: 2014
Outros Autores: Cano, Marco Antonio Oliva, Lopes, Nei Fernandes
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/14069
Resumo: Chlorophyll synthesis, stomatal behaviour and CO2 balance were studied during the period of leaf ontogeny in seedlings of H. brasiliensis (lAN 873) and H. pauciflora grown under two water conditions. When submitted to a water stress H. pauciflora was able to maintain higher and more stable water potentials (Ψw) than other species. Reduction in photosynthesis rates in water stressed plants was associated to a drop in Ψw in both species. This reduction in H. brasiliensis was related to a decreasing 50% in chlorophyll synthesis and an increase in stomatal resistance. Under water stress H. pauciflora showed only an enhancement in the rates of photorespiration. 
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spelling Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditionsRegulação da fotossíntese durante a ontogenia foliar de progênies de Hevea brasiliensis e Hevea pauciflora submetidas a dois regimes hídricoschlorophyll; stomatal resistance; water potential; photorespirationclorofila; resistência estomática; potencial hídrico; fotorrespiraçãoChlorophyll synthesis, stomatal behaviour and CO2 balance were studied during the period of leaf ontogeny in seedlings of H. brasiliensis (lAN 873) and H. pauciflora grown under two water conditions. When submitted to a water stress H. pauciflora was able to maintain higher and more stable water potentials (Ψw) than other species. Reduction in photosynthesis rates in water stressed plants was associated to a drop in Ψw in both species. This reduction in H. brasiliensis was related to a decreasing 50% in chlorophyll synthesis and an increase in stomatal resistance. Under water stress H. pauciflora showed only an enhancement in the rates of photorespiration. Plântulas de Hevea brasiliensis (Muell. Arg (lAN 873) e H. pauciflora Muell. Arg. foram submetidas a déficit hídrico permanente a fim de se estudar a síntese de clorofila, resistência estomática à difusão da água e balanço de CO2 durante a ontogenia foliar. O estado hídrico das plantas, caracterizado pelo potencial hídrico (Ψw), mostrou os maiores decréscimos em H. brasiliensis ao passo que os potenciais de H. pauciflora permaneceram mais altos e estáveis. A diminuição da fotossíntese em plantas estressadas de ambas as espécies foi proporcional à queda do potencial hídrico. Em H. brasiliensis esta diminuição pode ser explicada por redução de aproximadamente 50% na síntese de clorofila e o aumento de cinco vezes de resistência estomática. Apenas a fotorrespiração da H. pauciflora com déficit mostrou um acréscimo significativo. Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPita, Francisco Antonio OliveiraCano, Marco Antonio OlivaLopes, Nei Fernandes2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14069Pesquisa Agropecuaria Brasileira; v.23, n.11, nov. 1988; 1209-1219Pesquisa Agropecuária Brasileira; v.23, n.11, nov. 1988; 1209-12191678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14069/8049info:eu-repo/semantics/openAccess2014-09-18T18:45:31Zoai:ojs.seer.sct.embrapa.br:article/14069Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-18T18:45:31Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
Regulação da fotossíntese durante a ontogenia foliar de progênies de Hevea brasiliensis e Hevea pauciflora submetidas a dois regimes hídricos
title Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
spellingShingle Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
Pita, Francisco Antonio Oliveira
chlorophyll; stomatal resistance; water potential; photorespiration
clorofila; resistência estomática; potencial hídrico; fotorrespiração
title_short Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
title_full Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
title_fullStr Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
title_full_unstemmed Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
title_sort Photosynthesis regulation during leaf ontogeny progenies of Hevea brasiliensis and Hevea pauciflora grown under two water conditions
author Pita, Francisco Antonio Oliveira
author_facet Pita, Francisco Antonio Oliveira
Cano, Marco Antonio Oliva
Lopes, Nei Fernandes
author_role author
author2 Cano, Marco Antonio Oliva
Lopes, Nei Fernandes
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Pita, Francisco Antonio Oliveira
Cano, Marco Antonio Oliva
Lopes, Nei Fernandes
dc.subject.por.fl_str_mv chlorophyll; stomatal resistance; water potential; photorespiration
clorofila; resistência estomática; potencial hídrico; fotorrespiração
topic chlorophyll; stomatal resistance; water potential; photorespiration
clorofila; resistência estomática; potencial hídrico; fotorrespiração
description Chlorophyll synthesis, stomatal behaviour and CO2 balance were studied during the period of leaf ontogeny in seedlings of H. brasiliensis (lAN 873) and H. pauciflora grown under two water conditions. When submitted to a water stress H. pauciflora was able to maintain higher and more stable water potentials (Ψw) than other species. Reduction in photosynthesis rates in water stressed plants was associated to a drop in Ψw in both species. This reduction in H. brasiliensis was related to a decreasing 50% in chlorophyll synthesis and an increase in stomatal resistance. Under water stress H. pauciflora showed only an enhancement in the rates of photorespiration. 
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
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/14069
url https://seer.sct.embrapa.br/index.php/pab/article/view/14069
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/14069/8049
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.23, n.11, nov. 1988; 1209-1219
Pesquisa Agropecuária Brasileira; v.23, n.11, nov. 1988; 1209-1219
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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