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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
15/03/2017 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, P. A.; OLIVEIRA, I. V.; RODRIGUES, K. C. B.; COSME, V. S.; BASTOS, A. J. R.; DETMANN, K. S. C.; CUNHA, R. L.; FESTUCCI-BUSELLI, R. A.; DaMATTA, F. M.; PINHEIRO, H. A. |
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Afiliação: |
Priscilla A. Silva, UFRA; Igor V. Oliveira, UFRA; Kátia C. B. Rodrigues, UFRA; Vanessa S. Cosme, UFRA; Abel J. R. Bastos, UFRA; Kelly S. C. Detmann, UFV; ROBERTO LISBOA CUNHA, CPATU; Reginaldo A. Festucci-Buselli, UFRA; Fábio M. DaMatta, UFV; Hugo A. Pinheiro, UFRA. |
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Título: |
Leaf gas exchange and multiple enzymatic and non-enzymatic antioxidant strategies related to drought tolerance in two oil palm hybrids. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Trees, v. 30, n. 1, p. 203-214, Feb. 2016. |
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DOI: |
10.1007/s00468-015-1289-x |
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Idioma: |
Inglês |
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Conteúdo: |
Drought is a major environmental constraint limiting growth and yield of oil palm trees. In this study, two oil palm hybrids (BRS Manicoré and BRS C 2501) were grown in large containers and subjected to a water deficit during 57 days. Leaf gas exchange analysis was combined with an in-depth assessment of the antioxidant system over the drought imposition. Under drought, leaf water potential at predawn (Ψpd) decreased similarly in both hybrids. In parallel, there were decreases in the net CO2 assimilation rate (A), chlorophyll concentrations and Rubisco total activity. Overall, these decreases were more pronounced in BRS C 2501 than in BRS Manicoré. BRS C 2501 plants triggered more markedly its enzymatic antioxidant system earlier (Ψpd = −2.1 MPa) than did BRS Manicoré, but these responses were accompanied by higher concentrations of H2O2 and malondialdehyde in BRS C 2510 than in BRS Manicoré. With the progress of drought stress (Ψpd = −2.9 MPa and below), BRS Manicoré was better able to cope with oxidative stress through a more robust antioxidant system. In addition, significant decreases in drought-induced NAD+-malate dehydrogenase activities were only observed in stressed BRS C 2501 plants. Regardless of watering regimes, the total carotenoid, ascorbate and glutathione concentrations were higher in BRS Manicoré than in BRS C 2501. In conclusion, BRS Manicoré is better able to tolerate drought than BRS C 2501 by triggering multiple antioxidant strategies involved both in reactive oxygen species scavenging and dissipation of excess energy and/or reducing equivalents particularly under severe drought stress. MenosDrought is a major environmental constraint limiting growth and yield of oil palm trees. In this study, two oil palm hybrids (BRS Manicoré and BRS C 2501) were grown in large containers and subjected to a water deficit during 57 days. Leaf gas exchange analysis was combined with an in-depth assessment of the antioxidant system over the drought imposition. Under drought, leaf water potential at predawn (Ψpd) decreased similarly in both hybrids. In parallel, there were decreases in the net CO2 assimilation rate (A), chlorophyll concentrations and Rubisco total activity. Overall, these decreases were more pronounced in BRS C 2501 than in BRS Manicoré. BRS C 2501 plants triggered more markedly its enzymatic antioxidant system earlier (Ψpd = −2.1 MPa) than did BRS Manicoré, but these responses were accompanied by higher concentrations of H2O2 and malondialdehyde in BRS C 2510 than in BRS Manicoré. With the progress of drought stress (Ψpd = −2.9 MPa and below), BRS Manicoré was better able to cope with oxidative stress through a more robust antioxidant system. In addition, significant decreases in drought-induced NAD+-malate dehydrogenase activities were only observed in stressed BRS C 2501 plants. Regardless of watering regimes, the total carotenoid, ascorbate and glutathione concentrations were higher in BRS Manicoré than in BRS C 2501. In conclusion, BRS Manicoré is better able to tolerate drought than BRS C 2501 by triggering multiple antioxidant str... Mostrar Tudo |
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Palavras-Chave: |
Compostos antioxidantes; Déficit hídrico; Enzimas antioxidantes; Palma de óleo. |
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Thesagro: |
Elaeis Guineensis; Elaeis Oleifera. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02643naa a2200313 a 4500
001 2067029
005 2022-05-20
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s00468-015-1289-x$2DOI
100 1 $aSILVA, P. A.
245 $aLeaf gas exchange and multiple enzymatic and non-enzymatic antioxidant strategies related to drought tolerance in two oil palm hybrids.$h[electronic resource]
260 $c2016
520 $aDrought is a major environmental constraint limiting growth and yield of oil palm trees. In this study, two oil palm hybrids (BRS Manicoré and BRS C 2501) were grown in large containers and subjected to a water deficit during 57 days. Leaf gas exchange analysis was combined with an in-depth assessment of the antioxidant system over the drought imposition. Under drought, leaf water potential at predawn (Ψpd) decreased similarly in both hybrids. In parallel, there were decreases in the net CO2 assimilation rate (A), chlorophyll concentrations and Rubisco total activity. Overall, these decreases were more pronounced in BRS C 2501 than in BRS Manicoré. BRS C 2501 plants triggered more markedly its enzymatic antioxidant system earlier (Ψpd = −2.1 MPa) than did BRS Manicoré, but these responses were accompanied by higher concentrations of H2O2 and malondialdehyde in BRS C 2510 than in BRS Manicoré. With the progress of drought stress (Ψpd = −2.9 MPa and below), BRS Manicoré was better able to cope with oxidative stress through a more robust antioxidant system. In addition, significant decreases in drought-induced NAD+-malate dehydrogenase activities were only observed in stressed BRS C 2501 plants. Regardless of watering regimes, the total carotenoid, ascorbate and glutathione concentrations were higher in BRS Manicoré than in BRS C 2501. In conclusion, BRS Manicoré is better able to tolerate drought than BRS C 2501 by triggering multiple antioxidant strategies involved both in reactive oxygen species scavenging and dissipation of excess energy and/or reducing equivalents particularly under severe drought stress.
650 $aElaeis Guineensis
650 $aElaeis Oleifera
653 $aCompostos antioxidantes
653 $aDéficit hídrico
653 $aEnzimas antioxidantes
653 $aPalma de óleo
700 1 $aOLIVEIRA, I. V.
700 1 $aRODRIGUES, K. C. B.
700 1 $aCOSME, V. S.
700 1 $aBASTOS, A. J. R.
700 1 $aDETMANN, K. S. C.
700 1 $aCUNHA, R. L.
700 1 $aFESTUCCI-BUSELLI, R. A.
700 1 $aDaMATTA, F. M.
700 1 $aPINHEIRO, H. A.
773 $tTrees$gv. 30, n. 1, p. 203-214, Feb. 2016.
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Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 2 | |
| 1. |  | SOARES, D. S.; BORGES, I. D.; VASCONCELLOS, J. H.; CARVALHO, E. dos R. L.; AMORIM, G. D.; MOREIA, T. R. S.; SOUZA, V. S. de. Perfil dos produtores rurais plantadores do milho BRS 4154 Saracura em diversos estados e regiões do Brasil. In: CONGRESSO NACIONAL DE MILHO E SORGO, 31., 2016, Bento Gonçalves. Milho e sorgo: inovações, mercados e segurança alimentar: anais. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2016.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
|    |
| 2. | | SOUZA, V. A. de; BORGES, I. D.; VASCONCELLOS, J. H.; SOARES, D. S.; OLIVEIRA, E. R.; AMORIM, G. D.; MOREIRA, T. R. S. Perfil dos produtores rurais plantadores do milho Saracura em diversos estados e regiões do Brasil. In: CONGRESSO NACIONAL DE MILHO E SORGO, 31., 2016, Bento Gonçalves. Milho e sorgo: inovações, mercados e segurança alimentar: anais. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2016.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| Registros recuperados : 2 | |
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