Physiological and morphological responses of Brachiaria spp. to flooding
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/5982 |
Resumo: | The physiological and morphological responses of the forage grasses Brachiaria brizantha cv. Marandu, B. decumbens and B. humidicola were compared for plants grown in pots under flooding and well-drained conditions for 14 days. Flooding reduced specific leaf area and biomass allocation to roots in all species and enhanced leaf senescence in B. brizantha and B. decumbens. Relative growth rate was reduced by flooding in B. brizantha and B. decumbens, but not in B. humidicola. Leaf elongation rate was unaffected by flooding in B. decumbens and B. humidicola, but declined in B. brizantha since the first day of flooding. Net photosynthesis and leaf chlorophyll content were reduced by flooding in B. brizantha; however, no flooding effect could be detected in the other two species. For all species, there was a close relationship between net photosynthesis and stomatal conductance under flooding. These results show that the studied species have distinct degrees of tolerance to flood, B. brizantha is intolerant, B. decumbens is moderately tolerant and B. humidicola is tolerant. Because leaf elongation rate was immediately depressed by flooding only in B. brizantha, this measurement could be appropriate as an early detection mechanism for relative flood tolerance in Brachiaria spp. |
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Physiological and morphological responses of Brachiaria spp. to floodingRespostas morfológicas e fisiológicas de Brachiaria spp. ao alagamento do soloBrachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; leaf area; chlorophyll; photosynthesis; biomass; growth rateBrachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; área foliar; clorofila; fotossíntese; biomassa; taxa de crescimentoThe physiological and morphological responses of the forage grasses Brachiaria brizantha cv. Marandu, B. decumbens and B. humidicola were compared for plants grown in pots under flooding and well-drained conditions for 14 days. Flooding reduced specific leaf area and biomass allocation to roots in all species and enhanced leaf senescence in B. brizantha and B. decumbens. Relative growth rate was reduced by flooding in B. brizantha and B. decumbens, but not in B. humidicola. Leaf elongation rate was unaffected by flooding in B. decumbens and B. humidicola, but declined in B. brizantha since the first day of flooding. Net photosynthesis and leaf chlorophyll content were reduced by flooding in B. brizantha; however, no flooding effect could be detected in the other two species. For all species, there was a close relationship between net photosynthesis and stomatal conductance under flooding. These results show that the studied species have distinct degrees of tolerance to flood, B. brizantha is intolerant, B. decumbens is moderately tolerant and B. humidicola is tolerant. Because leaf elongation rate was immediately depressed by flooding only in B. brizantha, this measurement could be appropriate as an early detection mechanism for relative flood tolerance in Brachiaria spp.As respostas morfológicas e fisiológicas de Brachiaria brizantha cv. Marandu, B. decumbens e B. humidicola foram comparadas em plantas cultivadas em vasos, sob solo alagado e bem drenado durante 14 dias. O alagamento reduziu a área foliar específica e a alocação de biomassa para as raízes em todas as três espécies e aumentou a senescência foliar em B. brizantha e B. decumbens. O alagamento reduziu a taxa de crescimento relativo em B. brizantha e B. decumbens, mas não em B. humidicola. A taxa de elongação foliar não foi afetada pelo alagamento em B. decumbens e B. humidicola, mas diminuiu em B. brizantha desde o primeiro dia de alagamento. A fotossíntese líquida e o conteúdo de clorofila foliar foram reduzidos pelo alagamento em B. brizantha; no entanto, nenhum efeito do alagamento pôde ser detectado nas outras espécies. Em todas as espécies, existiu uma estreita relação entre as taxas de fotossíntese líquida e a condutância estomatal. Esses resultados mostram que as espécies estudadas diferem quanto à tolerância ao alagamento. B. brizantha é intolerante, B. decumbens é moderadamente tolerante e B. humidicola é tolerante. Em virtude de a taxa de elongação foliar ter sido imediatamente afetada somente em B. brizantha, este parâmetro pode ser empregado como um mecanismo de detecção prematura da tolerância ao alagamento em Brachiaria spp.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBernardino Dias Filho, MoacyrCarvalho, Cláudio José Reis de2000-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5982Pesquisa Agropecuaria Brasileira; v.35, n.10, out. 2000; 1959-1966Pesquisa Agropecuária Brasileira; v.35, n.10, out. 2000; 1959-19661678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/5982/3086info:eu-repo/semantics/openAccess2014-08-19T19:45:02Zoai:ojs.seer.sct.embrapa.br:article/5982Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-19T19:45:02Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Physiological and morphological responses of Brachiaria spp. to flooding Respostas morfológicas e fisiológicas de Brachiaria spp. ao alagamento do solo |
title |
Physiological and morphological responses of Brachiaria spp. to flooding |
spellingShingle |
Physiological and morphological responses of Brachiaria spp. to flooding Bernardino Dias Filho, Moacyr Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; leaf area; chlorophyll; photosynthesis; biomass; growth rate Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; área foliar; clorofila; fotossíntese; biomassa; taxa de crescimento |
title_short |
Physiological and morphological responses of Brachiaria spp. to flooding |
title_full |
Physiological and morphological responses of Brachiaria spp. to flooding |
title_fullStr |
Physiological and morphological responses of Brachiaria spp. to flooding |
title_full_unstemmed |
Physiological and morphological responses of Brachiaria spp. to flooding |
title_sort |
Physiological and morphological responses of Brachiaria spp. to flooding |
author |
Bernardino Dias Filho, Moacyr |
author_facet |
Bernardino Dias Filho, Moacyr Carvalho, Cláudio José Reis de |
author_role |
author |
author2 |
Carvalho, Cláudio José Reis de |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Bernardino Dias Filho, Moacyr Carvalho, Cláudio José Reis de |
dc.subject.por.fl_str_mv |
Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; leaf area; chlorophyll; photosynthesis; biomass; growth rate Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; área foliar; clorofila; fotossíntese; biomassa; taxa de crescimento |
topic |
Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; leaf area; chlorophyll; photosynthesis; biomass; growth rate Brachiaria brizantha; Brachiaria decumbens; Brachiaria humidicola; área foliar; clorofila; fotossíntese; biomassa; taxa de crescimento |
description |
The physiological and morphological responses of the forage grasses Brachiaria brizantha cv. Marandu, B. decumbens and B. humidicola were compared for plants grown in pots under flooding and well-drained conditions for 14 days. Flooding reduced specific leaf area and biomass allocation to roots in all species and enhanced leaf senescence in B. brizantha and B. decumbens. Relative growth rate was reduced by flooding in B. brizantha and B. decumbens, but not in B. humidicola. Leaf elongation rate was unaffected by flooding in B. decumbens and B. humidicola, but declined in B. brizantha since the first day of flooding. Net photosynthesis and leaf chlorophyll content were reduced by flooding in B. brizantha; however, no flooding effect could be detected in the other two species. For all species, there was a close relationship between net photosynthesis and stomatal conductance under flooding. These results show that the studied species have distinct degrees of tolerance to flood, B. brizantha is intolerant, B. decumbens is moderately tolerant and B. humidicola is tolerant. Because leaf elongation rate was immediately depressed by flooding only in B. brizantha, this measurement could be appropriate as an early detection mechanism for relative flood tolerance in Brachiaria spp. |
publishDate |
2000 |
dc.date.none.fl_str_mv |
2000-10-01 |
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/5982 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5982 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/5982/3086 |
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.35, n.10, out. 2000; 1959-1966 Pesquisa Agropecuária Brasileira; v.35, n.10, out. 2000; 1959-1966 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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1793416710705905664 |