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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: |
27/07/2026 |
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Data da última atualização: |
27/07/2026 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOPES FILHO, W. R. L.; RODRIGUES, F. H. S.; CHAVES, R. P. F.; CUNHA, R. L.; COSTA, L. C.; PINHEIRO, H. A. |
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Afiliação: |
WAGNER ROMULO L. LOPES FILHO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; FLAVIO HENRIQUE S. RODRIGUES, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; ROSANE PATRÍCIA F. CHAVES; ROBERTO LISBOA CUNHA, CPATU; LUCAS C. COSTA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; HUGO A. PINHEIRO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA. |
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Título: |
Repeated water deficit events trigger adjustments in enzymatic antioxidant system in oil palm. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Theoretical and Experimental Plant Physiology, v. 36, n. 2, p. 235-250, 2024. |
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ISSN: |
2197-0025. |
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DOI: |
https://doi.org/10.1007/s40626-024-00316-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Plants are able to reprogram their metabolism to cope with drought stress based on previous signals of water deficit events. Recently, we reported that oil palm seedlings exposed to three water deficit cycles attenuate oxidative damage on the photosynthetic machinery when compared to those facing drought conditions for the first time. However, the mechanism underlying the photosynthetic apparatus maintenance at either single or repeated events of drought stress is not well understood. Herein, oil palm seedlings were investigated for their photosynthesis acclimation upon single (1WD) and repeated (3WD) events of drought by assessing leaf gas exchange, chlorophyll fluorescence, and biochemical variables when predawn leaf water potential of stressed plants reached about –1.7 MPa (Day 7) and 2.5 MPa (Day 28). Plants of 1WD treatment exhibited higher chlorophyll degradation, higher membrane lipid peroxidation, and lower photosystem II activity than both control and 3WD plants. In contrast, 3WD plants exhibited low hydrogen peroxide coupled with upregulation of the enzymatic antioxidant system. The outcomes suggest that the acclimation of oil palm plants to repetitive water deficit events is related to the adjustments in antioxidant enzyme activities to attenuate oxidative damage to the photosynthetic machinery. |
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Thesagro: |
Antioxidante; Dendê; Elaeis Guineensis; Enzima. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02114naa a2200253 a 4500
001 2188642
005 2026-07-27
008 2024 bl uuuu u00u1 u #d
022 $a2197-0025.
024 7 $ahttps://doi.org/10.1007/s40626-024-00316-5$2DOI
100 1 $aLOPES FILHO, W. R. L.
245 $aRepeated water deficit events trigger adjustments in enzymatic antioxidant system in oil palm.$h[electronic resource]
260 $c2024
520 $aPlants are able to reprogram their metabolism to cope with drought stress based on previous signals of water deficit events. Recently, we reported that oil palm seedlings exposed to three water deficit cycles attenuate oxidative damage on the photosynthetic machinery when compared to those facing drought conditions for the first time. However, the mechanism underlying the photosynthetic apparatus maintenance at either single or repeated events of drought stress is not well understood. Herein, oil palm seedlings were investigated for their photosynthesis acclimation upon single (1WD) and repeated (3WD) events of drought by assessing leaf gas exchange, chlorophyll fluorescence, and biochemical variables when predawn leaf water potential of stressed plants reached about –1.7 MPa (Day 7) and 2.5 MPa (Day 28). Plants of 1WD treatment exhibited higher chlorophyll degradation, higher membrane lipid peroxidation, and lower photosystem II activity than both control and 3WD plants. In contrast, 3WD plants exhibited low hydrogen peroxide coupled with upregulation of the enzymatic antioxidant system. The outcomes suggest that the acclimation of oil palm plants to repetitive water deficit events is related to the adjustments in antioxidant enzyme activities to attenuate oxidative damage to the photosynthetic machinery.
650 $aAntioxidante
650 $aDendê
650 $aElaeis Guineensis
650 $aEnzima
700 1 $aRODRIGUES, F. H. S.
700 1 $aCHAVES, R. P. F.
700 1 $aCUNHA, R. L.
700 1 $aCOSTA, L. C.
700 1 $aPINHEIRO, H. A.
773 $tTheoretical and Experimental Plant Physiology$gv. 36, n. 2, p. 235-250, 2024.
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| 1. |  | BALLAMINGIE, P.; BLAY-PALMER, A.; KNEZEVIC, I.; LACERDA, A. E. B. de; NIMMO, E.; STAHLBRAND, L.; AYALON, R. Integrating a food systems lens into discussions of urban resilience: a policy analysis. Journal of Agriculture, Food Systems, and Community Development, v. 9, n. 3, p. 1-17, 2020.| Tipo: Artigo em Periódico Indexado |
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