Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.

Detalhes bibliográficos
Autor(a) principal: Volpe, Clovis Alberto
Data de Publicação: 2014
Outros Autores: Brunini, Orivaldo, Camargo, Marcelo B. Paes de
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/13523
Resumo: Diurnal changes of the stomatal resistance to water vapour diffusion in leaves were observed in three com (Zea mays L.) varieties: IAC-Maya, IAC-Maya Latente and Cargi11-601. The adaxial and abaxial stomatal resistance were measured separately with a steady-state porometer on adjacent portions of the leaf. The photosynthetically active radiation of lhe radiation flux density incident upon the leaf biade surface was also measured. At low soil moisture (matric potential of -0,4 MPa), a greater sensibijity for stomatal closing was observed for vas-iety IAC-Maya Latente, during periods of high evaporative demand. At high soil moisture (matric potential of -0,02 M Pa), the relationship between stomatal resistance and the photosynthetically active radiation of the radiation photons incident upon the adaxial leaf surface was a hyperbolic function. Also the sensibility of the abaxial stomatal resistance to the radiation flux density was higher than the adaxial stomatal resistance
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spelling Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.Resistência estomática à difusão do vapor d'água de folhas de milho em função da radiação fotossinteticamente ativa em condições de campo.porometer; adaxial stomatal; abaxial stomatal; latent factor; radiation flux densityepiderme superior; epiderme inferior; fator latente; porômetro; densidade de fluxo de radiação.Diurnal changes of the stomatal resistance to water vapour diffusion in leaves were observed in three com (Zea mays L.) varieties: IAC-Maya, IAC-Maya Latente and Cargi11-601. The adaxial and abaxial stomatal resistance were measured separately with a steady-state porometer on adjacent portions of the leaf. The photosynthetically active radiation of lhe radiation flux density incident upon the leaf biade surface was also measured. At low soil moisture (matric potential of -0,4 MPa), a greater sensibijity for stomatal closing was observed for vas-iety IAC-Maya Latente, during periods of high evaporative demand. At high soil moisture (matric potential of -0,02 M Pa), the relationship between stomatal resistance and the photosynthetically active radiation of the radiation photons incident upon the adaxial leaf surface was a hyperbolic function. Also the sensibility of the abaxial stomatal resistance to the radiation flux density was higher than the adaxial stomatal resistanceFoi medida, com um porômetro de equilíbrio dinâmico, a variação diurna da resistência estomática à difusão de vapor d'água nas folhas de milho (Zea mays L.) das cultivares IAC-Maya, IAC-Maya Latente e Cargill-601. Mediram-se as resistências estomáticas adaxial e abaxial e a densidade de fluxo de fótons de radiação fotossinteticamente ativa sobre a superfície superior da folha. Em condição de baixa umidade do solo (potencial matricial de -0,4 MPa) observou-se, na cultivar IAC-Maya Latente, maior sensibilidade para o fechamento dos estômatos nos horários de maior demanda evaporativa da atmosfera. Em condição e solo muito úmido (potencial matricial de -0,02 MPa) observou-se uma relação hiperbólica entre a resistência estomática e a densidade de fluxo de fótons, para o intervalo de 100 a 2500 uE.s-¹.m-², assim como maior abertura dos estômatos da epiderme inferior em baixa densidade de fluxo de fótons.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraVolpe, Clovis AlbertoBrunini, OrivaldoCamargo, Marcelo B. Paes de2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13523Pesquisa Agropecuaria Brasileira; v.25, n.6, jun. 1990; 915-924Pesquisa Agropecuária Brasileira; v.25, n.6, jun. 1990; 915-9241678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/13523/7681info:eu-repo/semantics/openAccess2014-04-17T14:34:40Zoai:ojs.seer.sct.embrapa.br:article/13523Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-17T14:34:40Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
Resistência estomática à difusão do vapor d'água de folhas de milho em função da radiação fotossinteticamente ativa em condições de campo.
title Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
spellingShingle Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
Volpe, Clovis Alberto
porometer; adaxial stomatal; abaxial stomatal; latent factor; radiation flux density
epiderme superior; epiderme inferior; fator latente; porômetro; densidade de fluxo de radiação.
title_short Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
title_full Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
title_fullStr Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
title_full_unstemmed Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
title_sort Stomatal resistance to water vapour exchange for com leavos In function of photosynthetically active radiation under field conditions.
author Volpe, Clovis Alberto
author_facet Volpe, Clovis Alberto
Brunini, Orivaldo
Camargo, Marcelo B. Paes de
author_role author
author2 Brunini, Orivaldo
Camargo, Marcelo B. Paes de
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Volpe, Clovis Alberto
Brunini, Orivaldo
Camargo, Marcelo B. Paes de
dc.subject.por.fl_str_mv porometer; adaxial stomatal; abaxial stomatal; latent factor; radiation flux density
epiderme superior; epiderme inferior; fator latente; porômetro; densidade de fluxo de radiação.
topic porometer; adaxial stomatal; abaxial stomatal; latent factor; radiation flux density
epiderme superior; epiderme inferior; fator latente; porômetro; densidade de fluxo de radiação.
description Diurnal changes of the stomatal resistance to water vapour diffusion in leaves were observed in three com (Zea mays L.) varieties: IAC-Maya, IAC-Maya Latente and Cargi11-601. The adaxial and abaxial stomatal resistance were measured separately with a steady-state porometer on adjacent portions of the leaf. The photosynthetically active radiation of lhe radiation flux density incident upon the leaf biade surface was also measured. At low soil moisture (matric potential of -0,4 MPa), a greater sensibijity for stomatal closing was observed for vas-iety IAC-Maya Latente, during periods of high evaporative demand. At high soil moisture (matric potential of -0,02 M Pa), the relationship between stomatal resistance and the photosynthetically active radiation of the radiation photons incident upon the adaxial leaf surface was a hyperbolic function. Also the sensibility of the abaxial stomatal resistance to the radiation flux density was higher than the adaxial stomatal resistance
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/13523
url https://seer.sct.embrapa.br/index.php/pab/article/view/13523
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/13523/7681
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.25, n.6, jun. 1990; 915-924
Pesquisa Agropecuária Brasileira; v.25, n.6, jun. 1990; 915-924
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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