Effects of soil water depletion on the water relations in tropical kudzu

Detalhes bibliográficos
Autor(a) principal: Netto, Adaucto Bellarmino de Pereira
Data de Publicação: 1999
Outros Autores: Magalhães, Antonio Celso Novaes de, Pinto, Hilton Silveira
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/5318
Resumo: Tropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae: Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (TL) in tropical kudzu. RWC of water-stressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g (H2O).g (dry soil)-1. Stomatal conductance of stressed plants decreased from 221 to 98 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in TL between water-stressed and unstressed plants (DTL) rose linearly from 0.1 to 2.2oC following progressive water deficit. RWC and TL of water-stressed plants paralled RWC and TL of unstressed plants the day after re-irrigation. The strong decrease in SWC found in this study only induced moderate water stress in tropical kudzu. In addition, tropical kudzu recover rapidly from the induced water stress after the re-irrigation.
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spelling Effects of soil water depletion on the water relations in tropical kudzuEfeito da deficiência hídrica no solo sobre as relações hídricas em pueráriacover crop; ecophysiology; forage; Leguminosae; Pueraria phaseoloides; water deficitcultura de cobertura; ecofisiologia; forragem; Leguminosae; Pueraria phaseoloides; déficit hídricoTropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae: Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (TL) in tropical kudzu. RWC of water-stressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g (H2O).g (dry soil)-1. Stomatal conductance of stressed plants decreased from 221 to 98 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in TL between water-stressed and unstressed plants (DTL) rose linearly from 0.1 to 2.2oC following progressive water deficit. RWC and TL of water-stressed plants paralled RWC and TL of unstressed plants the day after re-irrigation. The strong decrease in SWC found in this study only induced moderate water stress in tropical kudzu. In addition, tropical kudzu recover rapidly from the induced water stress after the re-irrigation.O kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae: Faboideae) é uma espécie nativa do úmido sudeste asiático, com potencial para emprego como cobertura em regiões sujeitas à seca sazonal. Este trabalho objetiva avaliar os efeitos da redução no conteúdo de água do solo (SWC) sobre o conteúdo relativo de água (RWC), condutância estomática (g) e temperatura de folíolos (TL) de plantas de puerária. Redução no RWC, de 96 para 78%, e redução na g, de 221 para 98 mmol.m-2.s-1, se mostraram associadas à diminuição no conteúdo de água do solo (SWC), de 0,25 para 0,17 g (H2O).g (solo seco)-1. No dia seguinte à re-irrigação, a g de plantas estressadas era 15% inferior à g de plantas não submetidas ao estresse hídrico. A diferença em TL entre plantas estressadas e não-estressadas (DTL) aumentou linearmente de 0,1 para 2,2oC com a progressão do déficit hídrico. RWC e TL de plantas estressadas e não-estressadas se igualaram no dia seguinte à re-irrigação. O forte decréscimo em SWC encontrado neste estudo induziu somente um déficit hídrico moderado em kudzu tropical. O déficit hídrico induzido em kudzu tropical pode ser rapidamente superado após a re-irrigação.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraNetto, Adaucto Bellarmino de PereiraMagalhães, Antonio Celso Novaes dePinto, Hilton Silveira1999-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5318Pesquisa Agropecuaria Brasileira; v.34, n.7, jul. 1999; 1151-1157Pesquisa Agropecuária Brasileira; v.34, n.7, jul. 1999; 1151-11571678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5318/2510info:eu-repo/semantics/openAccess2012-02-16T11:45:43Zoai:ojs.seer.sct.embrapa.br:article/5318Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-02-16T11:45:43Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Effects of soil water depletion on the water relations in tropical kudzu
Efeito da deficiência hídrica no solo sobre as relações hídricas em puerária
title Effects of soil water depletion on the water relations in tropical kudzu
spellingShingle Effects of soil water depletion on the water relations in tropical kudzu
Netto, Adaucto Bellarmino de Pereira
cover crop; ecophysiology; forage; Leguminosae; Pueraria phaseoloides; water deficit
cultura de cobertura; ecofisiologia; forragem; Leguminosae; Pueraria phaseoloides; déficit hídrico
title_short Effects of soil water depletion on the water relations in tropical kudzu
title_full Effects of soil water depletion on the water relations in tropical kudzu
title_fullStr Effects of soil water depletion on the water relations in tropical kudzu
title_full_unstemmed Effects of soil water depletion on the water relations in tropical kudzu
title_sort Effects of soil water depletion on the water relations in tropical kudzu
author Netto, Adaucto Bellarmino de Pereira
author_facet Netto, Adaucto Bellarmino de Pereira
Magalhães, Antonio Celso Novaes de
Pinto, Hilton Silveira
author_role author
author2 Magalhães, Antonio Celso Novaes de
Pinto, Hilton Silveira
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Netto, Adaucto Bellarmino de Pereira
Magalhães, Antonio Celso Novaes de
Pinto, Hilton Silveira
dc.subject.por.fl_str_mv cover crop; ecophysiology; forage; Leguminosae; Pueraria phaseoloides; water deficit
cultura de cobertura; ecofisiologia; forragem; Leguminosae; Pueraria phaseoloides; déficit hídrico
topic cover crop; ecophysiology; forage; Leguminosae; Pueraria phaseoloides; water deficit
cultura de cobertura; ecofisiologia; forragem; Leguminosae; Pueraria phaseoloides; déficit hídrico
description Tropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae: Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (TL) in tropical kudzu. RWC of water-stressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g (H2O).g (dry soil)-1. Stomatal conductance of stressed plants decreased from 221 to 98 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in TL between water-stressed and unstressed plants (DTL) rose linearly from 0.1 to 2.2oC following progressive water deficit. RWC and TL of water-stressed plants paralled RWC and TL of unstressed plants the day after re-irrigation. The strong decrease in SWC found in this study only induced moderate water stress in tropical kudzu. In addition, tropical kudzu recover rapidly from the induced water stress after the re-irrigation.
publishDate 1999
dc.date.none.fl_str_mv 1999-07-01
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/5318
url https://seer.sct.embrapa.br/index.php/pab/article/view/5318
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/5318/2510
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.34, n.7, jul. 1999; 1151-1157
Pesquisa Agropecuária Brasileira; v.34, n.7, jul. 1999; 1151-1157
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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