Variables associated with the tolerance to water deficit in forage grasses
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Publication Date: | 2014 |
Other Authors: | , , |
Format: | Article |
Language: | por |
Source: | Pesquisa Agropecuária Brasileira (Online) |
Download full: | https://seer.sct.embrapa.br/index.php/pab/article/view/15312 |
Summary: | The tolerance to water deficit of four tropical grasses was evaluated under field conditions. The leaf water potential, stomatal resistance, sprout height and leaf blade length were determined for Carimagua grass (Andropogon gayanus) buffel grass (Cenchrus ciliaris) cvs. Gayndah and Biloela, and Brachiaria Amazonian kikuyo grass (Brachiaria humidicola). The carimagua, 'Gayndah' and Biloela' grasses, under water deficit conditions, did not attain the critical level of leaf water potential for stomatal closing. The Amazonian kikuyo grass attained the lowest leaf water potential (-21 bars) and greatest diffusive stomatal resistance (20 seg. Cm-1) of the grasses studied here. The carimagua 'Gayndah' and 'Biloela' grasses also demonstrated, in relation to sprout height and leaf blade length, greater tolerance to water deficit than Amazonian kikuyo grass. Hence, the carimagua, 'Gayandah' and Biloela' grasses are a choice for areas where drought occurs for more than 120 days. |
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Variables associated with the tolerance to water deficit in forage grassesVariáveis relacionadas com a tolerância de gramíneas forrageiras ao déficit hídricowater potential; stomatal resistance; Andropogon gayanus; Cenchrus; ciliaris; Brachiaria humidicolapotencial hídrico; resistência estomática; Andropogon gayanus; Cenchrus ciliaris; Brachiaria humidicola; quicuio-da-amazôniaThe tolerance to water deficit of four tropical grasses was evaluated under field conditions. The leaf water potential, stomatal resistance, sprout height and leaf blade length were determined for Carimagua grass (Andropogon gayanus) buffel grass (Cenchrus ciliaris) cvs. Gayndah and Biloela, and Brachiaria Amazonian kikuyo grass (Brachiaria humidicola). The carimagua, 'Gayndah' and Biloela' grasses, under water deficit conditions, did not attain the critical level of leaf water potential for stomatal closing. The Amazonian kikuyo grass attained the lowest leaf water potential (-21 bars) and greatest diffusive stomatal resistance (20 seg. Cm-1) of the grasses studied here. The carimagua 'Gayndah' and 'Biloela' grasses also demonstrated, in relation to sprout height and leaf blade length, greater tolerance to water deficit than Amazonian kikuyo grass. Hence, the carimagua, 'Gayandah' and Biloela' grasses are a choice for areas where drought occurs for more than 120 days.Avaliou-se, sob condições de campo, a tolerância ao déficit hídrico de quatro gramíneas forrageiras. Determinaram-se o potencial hídrico da folha, a resistência estomática, a altura dos perfilhos e o comprimento do limbo foliar do capim-carimagua (Andropogon gayanus), capim-bufel (Cenchrus ciliaris) cvs. Gayndah e Biloela, e quicuio-da-amazônia (Brachiaria humidicola). Os capins carimagua, 'Gayndah' e 'Biloela' sob regime seco, não atingiram um valor crítico de potencial hídrico da folha para o fechamento estomático. O capim quicuio-da-amazônia atingiu mais baixo potencial hídrico da folha (-21 bares) e mais alta resistência estomática (20 seg.cm-1) em relação aos demais capins estudados neste trabalho. Com relação a altura do perfilho e comprimento do limbo foliar, os capins carimagua, 'Gayndah' e 'Biloela' também se comportaram como mais tolerantes ao déficit hídrico. Dessa forma, os capins carimagua, 'Gayndah' e 'Biloela' são opções mais seguras para as áreas onde ocorrem estiagens de mais de 120 dias.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMachado, Regina C.R.Souza, Hermínia M.F.Moreno, Miguel A.Alvim, Paulo de T.2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15312Pesquisa Agropecuaria Brasileira; v.18, n.6, jun. 1983; 603-608Pesquisa Agropecuária Brasileira; v.18, n.6, jun. 1983; 603-6081678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15312/9158info:eu-repo/semantics/openAccess2014-04-16T18:59:25Zoai:ojs.seer.sct.embrapa.br:article/15312Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T18:59:25Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Variables associated with the tolerance to water deficit in forage grasses Variáveis relacionadas com a tolerância de gramíneas forrageiras ao déficit hídrico |
title |
Variables associated with the tolerance to water deficit in forage grasses |
spellingShingle |
Variables associated with the tolerance to water deficit in forage grasses Machado, Regina C.R. water potential; stomatal resistance; Andropogon gayanus; Cenchrus; ciliaris; Brachiaria humidicola potencial hídrico; resistência estomática; Andropogon gayanus; Cenchrus ciliaris; Brachiaria humidicola; quicuio-da-amazônia |
title_short |
Variables associated with the tolerance to water deficit in forage grasses |
title_full |
Variables associated with the tolerance to water deficit in forage grasses |
title_fullStr |
Variables associated with the tolerance to water deficit in forage grasses |
title_full_unstemmed |
Variables associated with the tolerance to water deficit in forage grasses |
title_sort |
Variables associated with the tolerance to water deficit in forage grasses |
author |
Machado, Regina C.R. |
author_facet |
Machado, Regina C.R. Souza, Hermínia M.F. Moreno, Miguel A. Alvim, Paulo de T. |
author_role |
author |
author2 |
Souza, Hermínia M.F. Moreno, Miguel A. Alvim, Paulo de T. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Machado, Regina C.R. Souza, Hermínia M.F. Moreno, Miguel A. Alvim, Paulo de T. |
dc.subject.por.fl_str_mv |
water potential; stomatal resistance; Andropogon gayanus; Cenchrus; ciliaris; Brachiaria humidicola potencial hídrico; resistência estomática; Andropogon gayanus; Cenchrus ciliaris; Brachiaria humidicola; quicuio-da-amazônia |
topic |
water potential; stomatal resistance; Andropogon gayanus; Cenchrus; ciliaris; Brachiaria humidicola potencial hídrico; resistência estomática; Andropogon gayanus; Cenchrus ciliaris; Brachiaria humidicola; quicuio-da-amazônia |
description |
The tolerance to water deficit of four tropical grasses was evaluated under field conditions. The leaf water potential, stomatal resistance, sprout height and leaf blade length were determined for Carimagua grass (Andropogon gayanus) buffel grass (Cenchrus ciliaris) cvs. Gayndah and Biloela, and Brachiaria Amazonian kikuyo grass (Brachiaria humidicola). The carimagua, 'Gayndah' and Biloela' grasses, under water deficit conditions, did not attain the critical level of leaf water potential for stomatal closing. The Amazonian kikuyo grass attained the lowest leaf water potential (-21 bars) and greatest diffusive stomatal resistance (20 seg. Cm-1) of the grasses studied here. The carimagua 'Gayndah' and 'Biloela' grasses also demonstrated, in relation to sprout height and leaf blade length, greater tolerance to water deficit than Amazonian kikuyo grass. Hence, the carimagua, 'Gayandah' and Biloela' grasses are a choice for areas where drought occurs for more than 120 days. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-16 |
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/15312 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/15312 |
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/15312/9158 |
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.18, n.6, jun. 1983; 603-608 Pesquisa Agropecuária Brasileira; v.18, n.6, jun. 1983; 603-608 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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1793416697342853120 |