Yield, yield components and growth and distribution of roots of cowpea under water stress
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | , , |
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/4605 |
Resumo: | Two greenhouse experiments were carried out in order to study the effect of drought stress on yield, yield components and root distribution of cowpea (Vigna unguiculata (L) Walp). The following cultivars were used: cv. Pitiúba, prostrate/creeping type, and cvs. Setentão and Epace-10, intermediate spreading bush type. In experiment 1 the plants were harvested at 82 DAG and were subjected to three water regimes: a) control; b) stress in the vegetative stage; and c) stress in the reproductive stage. In experiment 2 the plants were harvested at 42 DAG and received two water regimes: a) control, and b) water stress. Water stress decreased leaf Ψw leaf area, tops and root dry matter, and root/shoot dry matter ratio. The cv. Pitiúba showed a more vigorous root system in wet regime, followed by Setentão and Epace-10. Under water stress all three cvs. had deeper roots, and the cv. Setentão showed the highest ability to develop deeper roots. Water stress when applied at the vegetative stage delayed date of flowering in all cultivars. The number of flowers, pods and weight of pods/plant were reduced by stress. Pod length and number of seeds/pod were reduced only when plants were stressed from 36 to 82 DAG. Seed yield was reduced by stress for all cvs. for both stages of growth. Pod/flower number ratio was not affected by water regime. |
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Yield, yield components and growth and distribution of roots of cowpea under water stressProdução, componentes de produção, crescimento e distribuição das raízes de caupi submetido à deficiência hídricawater stress; drought stress; cowpea; water potencialfeijão macassar; feijão-de-corda; déficit hídrico; potencial hídricoTwo greenhouse experiments were carried out in order to study the effect of drought stress on yield, yield components and root distribution of cowpea (Vigna unguiculata (L) Walp). The following cultivars were used: cv. Pitiúba, prostrate/creeping type, and cvs. Setentão and Epace-10, intermediate spreading bush type. In experiment 1 the plants were harvested at 82 DAG and were subjected to three water regimes: a) control; b) stress in the vegetative stage; and c) stress in the reproductive stage. In experiment 2 the plants were harvested at 42 DAG and received two water regimes: a) control, and b) water stress. Water stress decreased leaf Ψw leaf area, tops and root dry matter, and root/shoot dry matter ratio. The cv. Pitiúba showed a more vigorous root system in wet regime, followed by Setentão and Epace-10. Under water stress all three cvs. had deeper roots, and the cv. Setentão showed the highest ability to develop deeper roots. Water stress when applied at the vegetative stage delayed date of flowering in all cultivars. The number of flowers, pods and weight of pods/plant were reduced by stress. Pod length and number of seeds/pod were reduced only when plants were stressed from 36 to 82 DAG. Seed yield was reduced by stress for all cvs. for both stages of growth. Pod/flower number ratio was not affected by water regime.Dois experimentos foram conduzidos em casa-de-vegetação com o objetivo de estudar o efeito do déficit hídrico na produção, componentes de produção e distribuição das raízes de caupi (Vigna unguiculata (L) Walp). Foram utilizadas as cvs. Pitiúba (ramadora); e Setentão e Epace-10 (semi-ramadora). No experimento 1, as plantas foram colhidas aos 82 DAG e submetidas a três regimes hídricos: a) testemunha; b) déficit na fase vegetativa; e c) déficit na fase reprodutiva. No experimento 2, as plantas foram colhidas aos 42 DAG e submetidas a dois regimes hídricos: a) testemunha; e b) déficit hídrico. O déficit hídrico determinou reduções no Ψw foliar, na área foliar, na matéria seca da parte aérea e das raízes, e na relação raiz/parte aérea. A cv. Pitiúba apresentou raízes mais vigorosas em condições normais de umidade, seguida pela Setentão e Epace-10. Em condições de deficiência hídrica, todas as cvs. aprofundaram o sistema radicular; esta capacidade foi mais acentuada na cv. Setentão. A deficiência hídrica aplicada na fase vegetativa determinou um adiamento do florescimento nas três cvs. O número de flores, de vagens e o peso das vagens por planta foram reduzidos pelo déficit hídrico. O comprimento das vagens e o número de grãos por vagem foram reduzidos apenas nas plantas que receberam déficit hídrico entre 36 e 82 DAG. A produção de sementes foi reduzida pelo déficit hídrico em todas as cultivares, independentemente do estádio de crescimento em que foi aplicado. A relação vagem/flor não foi afetada pelo regime hídrico.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMacedo Nunes Costa, Magna MariaAlves Fernandes Távora, Francisco JoséNunes de Pinho, João LicínioOliveira Melo, Francisco Ivaldo1997-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4605Pesquisa Agropecuaria Brasileira; v.32, n.1, jan. 1997; 43-50Pesquisa Agropecuária Brasileira; v.32, n.1, jan. 1997; 43-501678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4605/6959info:eu-repo/semantics/openAccess2015-02-19T18:47:25Zoai:ojs.seer.sct.embrapa.br:article/4605Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2015-02-19T18:47:25Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Yield, yield components and growth and distribution of roots of cowpea under water stress Produção, componentes de produção, crescimento e distribuição das raízes de caupi submetido à deficiência hídrica |
title |
Yield, yield components and growth and distribution of roots of cowpea under water stress |
spellingShingle |
Yield, yield components and growth and distribution of roots of cowpea under water stress Macedo Nunes Costa, Magna Maria water stress; drought stress; cowpea; water potencial feijão macassar; feijão-de-corda; déficit hídrico; potencial hídrico |
title_short |
Yield, yield components and growth and distribution of roots of cowpea under water stress |
title_full |
Yield, yield components and growth and distribution of roots of cowpea under water stress |
title_fullStr |
Yield, yield components and growth and distribution of roots of cowpea under water stress |
title_full_unstemmed |
Yield, yield components and growth and distribution of roots of cowpea under water stress |
title_sort |
Yield, yield components and growth and distribution of roots of cowpea under water stress |
author |
Macedo Nunes Costa, Magna Maria |
author_facet |
Macedo Nunes Costa, Magna Maria Alves Fernandes Távora, Francisco José Nunes de Pinho, João Licínio Oliveira Melo, Francisco Ivaldo |
author_role |
author |
author2 |
Alves Fernandes Távora, Francisco José Nunes de Pinho, João Licínio Oliveira Melo, Francisco Ivaldo |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Macedo Nunes Costa, Magna Maria Alves Fernandes Távora, Francisco José Nunes de Pinho, João Licínio Oliveira Melo, Francisco Ivaldo |
dc.subject.por.fl_str_mv |
water stress; drought stress; cowpea; water potencial feijão macassar; feijão-de-corda; déficit hídrico; potencial hídrico |
topic |
water stress; drought stress; cowpea; water potencial feijão macassar; feijão-de-corda; déficit hídrico; potencial hídrico |
description |
Two greenhouse experiments were carried out in order to study the effect of drought stress on yield, yield components and root distribution of cowpea (Vigna unguiculata (L) Walp). The following cultivars were used: cv. Pitiúba, prostrate/creeping type, and cvs. Setentão and Epace-10, intermediate spreading bush type. In experiment 1 the plants were harvested at 82 DAG and were subjected to three water regimes: a) control; b) stress in the vegetative stage; and c) stress in the reproductive stage. In experiment 2 the plants were harvested at 42 DAG and received two water regimes: a) control, and b) water stress. Water stress decreased leaf Ψw leaf area, tops and root dry matter, and root/shoot dry matter ratio. The cv. Pitiúba showed a more vigorous root system in wet regime, followed by Setentão and Epace-10. Under water stress all three cvs. had deeper roots, and the cv. Setentão showed the highest ability to develop deeper roots. Water stress when applied at the vegetative stage delayed date of flowering in all cultivars. The number of flowers, pods and weight of pods/plant were reduced by stress. Pod length and number of seeds/pod were reduced only when plants were stressed from 36 to 82 DAG. Seed yield was reduced by stress for all cvs. for both stages of growth. Pod/flower number ratio was not affected by water regime. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-01-01 |
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/4605 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/4605 |
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/4605/6959 |
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.32, n.1, jan. 1997; 43-50 Pesquisa Agropecuária Brasileira; v.32, n.1, jan. 1997; 43-50 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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1793416663678320640 |