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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
10/09/2014 |
Data da última atualização: |
26/05/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ALVES, A. A. C.; SETTER, T. L. |
Afiliação: |
ALFREDO AUGUSTO CUNHA ALVES, CNPMF; TIM L. SETTER, Cornell University. |
Título: |
Abscisic acid accumulation and osmotic adjustment in cassava under water deficit. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Environmental and Experimental Botany, v.51, p. 259-271, 2014. |
ISSN: |
0098-8472 |
Idioma: |
Inglês |
Conteúdo: |
Three cassava (Manihot esculenta) genotypes were grown in greenhouse conditions and subjected to water deficit treatments to: (a) assess the extent to which abscisic acid (ABA) and osmotically active solutes accumulate in cassava leaves during water deficit and solute contributions to osmotic adjustment (OA), and (b) determine whether cassava leaves substantially increase their content of dehydrin-like polypeptides during water deficit. The concentration of ABA, sugars (sucrose, glucose, and fructose), proline, and potassium salts (K-salts) were determined in mature and expanding leaves. ABA content increased under water deficit, consistent with a putative role in regulating solute accumulation, and thus OA. The extent of osmotic adjustment, although modest, was higher in young folded leaves than in mature leaves. K-salts were the major contributors to total osmolyte concentration in both mature and expanding leaves, accounting for approximately 60% of osmotic potential. The concentration of K-salts increased in response to water stress and was positively correlated with the extent of OA. In contrast, total sugars (sucrose + glucose + fructose) decreased during water deficit, showing a negative correlation with OA. Although the concentration of proline in mature leaves increased in response to water stress its contribution to the total change in osmotic potential was insignificant. Thus, in the current study, cassava used K-salts as its primary osmolyte, and did not substantially adjust its osmotic solute concentration during the 6-day water deficit. Expression of dehydrins was not found in any of the genotypes or leaf stages. MenosThree cassava (Manihot esculenta) genotypes were grown in greenhouse conditions and subjected to water deficit treatments to: (a) assess the extent to which abscisic acid (ABA) and osmotically active solutes accumulate in cassava leaves during water deficit and solute contributions to osmotic adjustment (OA), and (b) determine whether cassava leaves substantially increase their content of dehydrin-like polypeptides during water deficit. The concentration of ABA, sugars (sucrose, glucose, and fructose), proline, and potassium salts (K-salts) were determined in mature and expanding leaves. ABA content increased under water deficit, consistent with a putative role in regulating solute accumulation, and thus OA. The extent of osmotic adjustment, although modest, was higher in young folded leaves than in mature leaves. K-salts were the major contributors to total osmolyte concentration in both mature and expanding leaves, accounting for approximately 60% of osmotic potential. The concentration of K-salts increased in response to water stress and was positively correlated with the extent of OA. In contrast, total sugars (sucrose + glucose + fructose) decreased during water deficit, showing a negative correlation with OA. Although the concentration of proline in mature leaves increased in response to water stress its contribution to the total change in osmotic potential was insignificant. Thus, in the current study, cassava used K-salts as its primary osmolyte, and did not substant... Mostrar Tudo |
Palavras-Chave: |
Osmolyte concentration; Sugar concentration. |
Thesagro: |
Ácido abscísico; Inibidor de crescimento; Mandioca; Manihot Esculenta; Potássio. |
Thesaurus Nal: |
Abscisic acid; Cassava; Plant-water relations; Potassium; Proline. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02478naa a2200289 a 4500 001 1994717 005 2023-05-26 008 2014 bl uuuu u00u1 u #d 022 $a0098-8472 100 1 $aALVES, A. A. C. 245 $aAbscisic acid accumulation and osmotic adjustment in cassava under water deficit.$h[electronic resource] 260 $c2014 520 $aThree cassava (Manihot esculenta) genotypes were grown in greenhouse conditions and subjected to water deficit treatments to: (a) assess the extent to which abscisic acid (ABA) and osmotically active solutes accumulate in cassava leaves during water deficit and solute contributions to osmotic adjustment (OA), and (b) determine whether cassava leaves substantially increase their content of dehydrin-like polypeptides during water deficit. The concentration of ABA, sugars (sucrose, glucose, and fructose), proline, and potassium salts (K-salts) were determined in mature and expanding leaves. ABA content increased under water deficit, consistent with a putative role in regulating solute accumulation, and thus OA. The extent of osmotic adjustment, although modest, was higher in young folded leaves than in mature leaves. K-salts were the major contributors to total osmolyte concentration in both mature and expanding leaves, accounting for approximately 60% of osmotic potential. The concentration of K-salts increased in response to water stress and was positively correlated with the extent of OA. In contrast, total sugars (sucrose + glucose + fructose) decreased during water deficit, showing a negative correlation with OA. Although the concentration of proline in mature leaves increased in response to water stress its contribution to the total change in osmotic potential was insignificant. Thus, in the current study, cassava used K-salts as its primary osmolyte, and did not substantially adjust its osmotic solute concentration during the 6-day water deficit. Expression of dehydrins was not found in any of the genotypes or leaf stages. 650 $aAbscisic acid 650 $aCassava 650 $aPlant-water relations 650 $aPotassium 650 $aProline 650 $aÁcido abscísico 650 $aInibidor de crescimento 650 $aMandioca 650 $aManihot Esculenta 650 $aPotássio 653 $aOsmolyte concentration 653 $aSugar concentration 700 1 $aSETTER, T. L. 773 $tEnvironmental and Experimental Botany$gv.51, p. 259-271, 2014.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Roraima. Para informações adicionais entre em contato com cpafrr.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Roraima. |
Data corrente: |
13/07/2015 |
Data da última atualização: |
13/07/2015 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
NOGUEIRA, A.; COSTA, F. R. C.; VILELA-SANTOS, M. C.; CASTILHO, C. V. de; ANDRADE, A.; CAMARGO, J. L. C.; LAURANCE, W. F.; BURNHAM, R. J. |
Afiliação: |
CAROLINA VOLKMER DE CASTILHO, CPAF-RR. |
Título: |
Liana assemblage structure in four sites across the Brazilian Amazon. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
In: SCHNITZER, S. A.; BONGERS, F.; BURNHAM, R. J.; PUTZ, F. E. Ecology of Lianas. Wiley-Blackwell, 2014. |
Idioma: |
Inglês |
Palavras-Chave: |
Liana. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00653naa a2200205 a 4500 001 2019679 005 2015-07-13 008 2014 bl uuuu u00u1 u #d 100 1 $aNOGUEIRA, A. 245 $aLiana assemblage structure in four sites across the Brazilian Amazon.$h[electronic resource] 260 $c2014 653 $aLiana 700 1 $aCOSTA, F. R. C. 700 1 $aVILELA-SANTOS, M. C. 700 1 $aCASTILHO, C. V. de 700 1 $aANDRADE, A. 700 1 $aCAMARGO, J. L. C. 700 1 $aLAURANCE, W. F. 700 1 $aBURNHAM, R. J. 773 $tIn: SCHNITZER, S. A.; BONGERS, F.; BURNHAM, R. J.; PUTZ, F. E. Ecology of Lianas. Wiley-Blackwell, 2014.
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