Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit

Detalhes bibliográficos
Autor(a) principal: Conceição, Heraclito E. Oliveira da
Data de Publicação: 2014
Outros Autores: Oliva, Marco Antonio, Lopes, Nei Fernandes, Neto, Olinto Gomes da Rocha
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/16197
Resumo: Plants from IAN 717, IAN 873, IAN 2903, IAN 3087, IAN 6323 and Fx 3899 rubber tree (Hevea spp) clones grown in greenhouse were subjected to increasing soil water deficits, in order to evaluate the effects of water deficit on leaf water potential, stomatal resistance, photosynthesis, transpiration and chlorophyll content. Decreases in soil water potential reduced linearly and differentially the leaf water potential for all clones. The highest reduction values were found in IAN 717, IAN 3087 and IAN 873, and the lowest one in IAN 6323. Leaf water potential between -1.6 and -2.0 MPa caused a fast increase in stomatal resistance and a sharp reduction in transpiration rates for all clones. The lowest stomatal resistance volumes and the highest reductions in transpiration were in the IAN 6323. The highest water compensation point was -2,35 MPa from IAN 2903 and Fx 3899 progenies and the lowest was-3,18 MPa in the IAN 6323 progeny. IAN 6323 clone showed an efficient mechanism of drought avoidance and an effective stability of the photosynthesis apparatus under stress conditions. To a lesser degree, the IAN 717 and the IAN 3087 were resistant too.
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spelling Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficitResistência à seca em seringueira 1. Balanço hídrico e produção primária em seis clones submetidos a déficitstomatal resistance; photosynthesis; transpiration; chlorophyllfotossíntese; transpiração; clorofila; resistência estomáticaPlants from IAN 717, IAN 873, IAN 2903, IAN 3087, IAN 6323 and Fx 3899 rubber tree (Hevea spp) clones grown in greenhouse were subjected to increasing soil water deficits, in order to evaluate the effects of water deficit on leaf water potential, stomatal resistance, photosynthesis, transpiration and chlorophyll content. Decreases in soil water potential reduced linearly and differentially the leaf water potential for all clones. The highest reduction values were found in IAN 717, IAN 3087 and IAN 873, and the lowest one in IAN 6323. Leaf water potential between -1.6 and -2.0 MPa caused a fast increase in stomatal resistance and a sharp reduction in transpiration rates for all clones. The lowest stomatal resistance volumes and the highest reductions in transpiration were in the IAN 6323. The highest water compensation point was -2,35 MPa from IAN 2903 and Fx 3899 progenies and the lowest was-3,18 MPa in the IAN 6323 progeny. IAN 6323 clone showed an efficient mechanism of drought avoidance and an effective stability of the photosynthesis apparatus under stress conditions. To a lesser degree, the IAN 717 and the IAN 3087 were resistant too.Plantas de Seringueira (Hevea spp.) oriundas dos clones IAN 717, IAN 873, IAN 2903, IAN 3087, IAN 6323 e Fx 3899 foram cultivadas em casa de vegetação e submetidas a déficits hídricos crescentes no solo com objetivo de avaliar comparativamente os seus efeitos sobre o potencial hídrico foliar, resistência estomática, fotossíntese, transpiração e teor de clorofila. Os resultados mostraram que o decréscimo do potencial hídrico no solo reduziram linear e diferentemente o potencial hídrico foliar de todos os clones. Os maiores decréscimos foram encontrados nos clones IAN 717, IAN 3087 e IAN 873 e o menor no IAN 6323. Potenciais hídricos foliares entre -1,6 e -2,0 MPa causaram em todos os clones um rápido aumento da resistência estomática e as maiores reduções da transpiração corresponderam ao clone IAN 6323. O ponto de compensação hídrico mais alto foi -2,35 MPa em IAN 2903 e Fx 3899 e o mais baixo -3,18 MPa de IAN 6323. O clone IAN 6323 apresentou um eficiente mecanismo de prevenção à seca e uma efetiva estabilidade do aparelho fotossintético sob condições de estresse. Os clones IAN 717 e IAN 3087 foram, num nível inferior, também resistentes.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraConceição, Heraclito E. Oliveira daOliva, Marco AntonioLopes, Nei FernandesNeto, Olinto Gomes da Rocha2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16197Pesquisa Agropecuaria Brasileira; v.20, n.9, set. 1985; 1041-1050Pesquisa Agropecuária Brasileira; v.20, n.9, set. 1985; 1041-10501678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16197/10371info:eu-repo/semantics/openAccess2014-04-17T11:59:46Zoai:ojs.seer.sct.embrapa.br:article/16197Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-17T11:59:46Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
Resistência à seca em seringueira 1. Balanço hídrico e produção primária em seis clones submetidos a déficit
title Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
spellingShingle Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
Conceição, Heraclito E. Oliveira da
stomatal resistance; photosynthesis; transpiration; chlorophyll
fotossíntese; transpiração; clorofila; resistência estomática
title_short Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
title_full Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
title_fullStr Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
title_full_unstemmed Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
title_sort Drought resistance in rubber tree 1. Water balance and primary production in six clones subjected to water deficit
author Conceição, Heraclito E. Oliveira da
author_facet Conceição, Heraclito E. Oliveira da
Oliva, Marco Antonio
Lopes, Nei Fernandes
Neto, Olinto Gomes da Rocha
author_role author
author2 Oliva, Marco Antonio
Lopes, Nei Fernandes
Neto, Olinto Gomes da Rocha
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Conceição, Heraclito E. Oliveira da
Oliva, Marco Antonio
Lopes, Nei Fernandes
Neto, Olinto Gomes da Rocha
dc.subject.por.fl_str_mv stomatal resistance; photosynthesis; transpiration; chlorophyll
fotossíntese; transpiração; clorofila; resistência estomática
topic stomatal resistance; photosynthesis; transpiration; chlorophyll
fotossíntese; transpiração; clorofila; resistência estomática
description Plants from IAN 717, IAN 873, IAN 2903, IAN 3087, IAN 6323 and Fx 3899 rubber tree (Hevea spp) clones grown in greenhouse were subjected to increasing soil water deficits, in order to evaluate the effects of water deficit on leaf water potential, stomatal resistance, photosynthesis, transpiration and chlorophyll content. Decreases in soil water potential reduced linearly and differentially the leaf water potential for all clones. The highest reduction values were found in IAN 717, IAN 3087 and IAN 873, and the lowest one in IAN 6323. Leaf water potential between -1.6 and -2.0 MPa caused a fast increase in stomatal resistance and a sharp reduction in transpiration rates for all clones. The lowest stomatal resistance volumes and the highest reductions in transpiration were in the IAN 6323. The highest water compensation point was -2,35 MPa from IAN 2903 and Fx 3899 progenies and the lowest was-3,18 MPa in the IAN 6323 progeny. IAN 6323 clone showed an efficient mechanism of drought avoidance and an effective stability of the photosynthesis apparatus under stress conditions. To a lesser degree, the IAN 717 and the IAN 3087 were resistant too.
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/16197
url https://seer.sct.embrapa.br/index.php/pab/article/view/16197
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/16197/10371
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.20, n.9, set. 1985; 1041-1050
Pesquisa Agropecuária Brasileira; v.20, n.9, set. 1985; 1041-1050
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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