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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
10/11/2021 |
Data da última atualização: |
10/11/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
OLIVEIRA, I. V. de; AGUIAR, R. O.; LIMA, C. C.; CUNHA, R. L.; CRUZ, W. P. da; SILVA, C. R. da; SILVA, V. F. A.; SILVA, J. P. da; CARVALHO, F. I. M.; MARTINS, L. H. da S.; SILVA, P. A.; PINHEIRO, H. A. |
Afiliação: |
IGOR V. DE OLIVEIRA, Unifesspa; RODRIGO O. AGUIAR, UFRA; CLENES C. LIMA, UFRA; ROBERTO LISBOA CUNHA, CPATU; WILTON P. DA CRUZ, UFRA; CLAUDETE R. DA SILVA, UFRA; VICENTE F. A. SILVA, UFRA; JOSIANE P. DA SILVA, UFRA; FÁBIO I. M. CARVALHO, UFRA; LUIZA H. DA S. MARTINS, UFRA; PRISCILLA A. SILVA, UFRA; HUGO A. PINHEIRO, UFRA. |
Título: |
Diurnal variations in water potential and gas exchanges in two-hybrid oil palms under water deficit. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Journal of Agricultural Science, v. 12, n. 12, p. 75-88, 2020. |
DOI: |
https://doi.org/10.5539/jas.v12n12p75 |
Idioma: |
Inglês |
Conteúdo: |
Oil palm (Elaeis guineensis Jacq.) presents considerable sensitivity to water deficit and the identification of stress-tolerant hybrids is a strategy to improve the adaptation and growth of plants throughout the annual dry seasons. For this reason, we examined possible differences in water deficit tolerance in two oil palm hybrids (BRS Manicoré and BRS C 2501) subjected to moderate drought conditions. The comparison of hybrids was performed using diurnal curves of leaf water potential (Ψw), gas exchanges, and biochemical variables, such as chloroplast pigments and enzymes analysis. The experiment was carried out in a completely randomized design, in a 2 × 2 × 13 factorial scheme resulting from the combination of two hybrids versus two water regimes, and thirteen evaluation schedules. Regardless of the water regime, the maximum average value of net assimilation rates of CO2 (A), stomatal conductance to water vapor (gs), and water use efficiency (A/E) in both hybrids was registered at 8 h. Peaks of A, gs, and A/E coincided with milder climatic conditions during the morning. While decreases in these variables were observed with increases in air temperature and vapor pressure deficit between leaf and atmosphere throughout the day. The water deficit induced significant increases in the total carotenoids levels of BRS C 2501 (62%) and BRS Manicoré (220%), while chlorophyll a content was significantly reduced only in BRS C 2501 (36%) and chlorophyll b only in Manicoré (34%). It also mediated significant increases in the activities of glycolate and catalase oxidase in both hybrids; however, such increases were more expressive in BRS C 2501 than in BRS Manicoré. In conclusion, it can be inferred that BRS Manicoré presents more favorable physiological and biochemical responses to the water deficit imposed compared to BRS C 2501. MenosOil palm (Elaeis guineensis Jacq.) presents considerable sensitivity to water deficit and the identification of stress-tolerant hybrids is a strategy to improve the adaptation and growth of plants throughout the annual dry seasons. For this reason, we examined possible differences in water deficit tolerance in two oil palm hybrids (BRS Manicoré and BRS C 2501) subjected to moderate drought conditions. The comparison of hybrids was performed using diurnal curves of leaf water potential (Ψw), gas exchanges, and biochemical variables, such as chloroplast pigments and enzymes analysis. The experiment was carried out in a completely randomized design, in a 2 × 2 × 13 factorial scheme resulting from the combination of two hybrids versus two water regimes, and thirteen evaluation schedules. Regardless of the water regime, the maximum average value of net assimilation rates of CO2 (A), stomatal conductance to water vapor (gs), and water use efficiency (A/E) in both hybrids was registered at 8 h. Peaks of A, gs, and A/E coincided with milder climatic conditions during the morning. While decreases in these variables were observed with increases in air temperature and vapor pressure deficit between leaf and atmosphere throughout the day. The water deficit induced significant increases in the total carotenoids levels of BRS C 2501 (62%) and BRS Manicoré (220%), while chlorophyll a content was significantly reduced only in BRS C 2501 (36%) and chlorophyll b only in Manicoré (34%). I... Mostrar Tudo |
Thesagro: |
Catalase; Clorofila; Dendê; Elaeis Guineensis; Fotossíntese; Potencial Hídrico. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02855naa a2200337 a 4500 001 2135989 005 2021-11-10 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.5539/jas.v12n12p75$2DOI 100 1 $aOLIVEIRA, I. V. de 245 $aDiurnal variations in water potential and gas exchanges in two-hybrid oil palms under water deficit.$h[electronic resource] 260 $c2020 520 $aOil palm (Elaeis guineensis Jacq.) presents considerable sensitivity to water deficit and the identification of stress-tolerant hybrids is a strategy to improve the adaptation and growth of plants throughout the annual dry seasons. For this reason, we examined possible differences in water deficit tolerance in two oil palm hybrids (BRS Manicoré and BRS C 2501) subjected to moderate drought conditions. The comparison of hybrids was performed using diurnal curves of leaf water potential (Ψw), gas exchanges, and biochemical variables, such as chloroplast pigments and enzymes analysis. The experiment was carried out in a completely randomized design, in a 2 × 2 × 13 factorial scheme resulting from the combination of two hybrids versus two water regimes, and thirteen evaluation schedules. Regardless of the water regime, the maximum average value of net assimilation rates of CO2 (A), stomatal conductance to water vapor (gs), and water use efficiency (A/E) in both hybrids was registered at 8 h. Peaks of A, gs, and A/E coincided with milder climatic conditions during the morning. While decreases in these variables were observed with increases in air temperature and vapor pressure deficit between leaf and atmosphere throughout the day. The water deficit induced significant increases in the total carotenoids levels of BRS C 2501 (62%) and BRS Manicoré (220%), while chlorophyll a content was significantly reduced only in BRS C 2501 (36%) and chlorophyll b only in Manicoré (34%). It also mediated significant increases in the activities of glycolate and catalase oxidase in both hybrids; however, such increases were more expressive in BRS C 2501 than in BRS Manicoré. In conclusion, it can be inferred that BRS Manicoré presents more favorable physiological and biochemical responses to the water deficit imposed compared to BRS C 2501. 650 $aCatalase 650 $aClorofila 650 $aDendê 650 $aElaeis Guineensis 650 $aFotossíntese 650 $aPotencial Hídrico 700 1 $aAGUIAR, R. O. 700 1 $aLIMA, C. C. 700 1 $aCUNHA, R. L. 700 1 $aCRUZ, W. P. da 700 1 $aSILVA, C. R. da 700 1 $aSILVA, V. F. A. 700 1 $aSILVA, J. P. da 700 1 $aCARVALHO, F. I. M. 700 1 $aMARTINS, L. H. da S. 700 1 $aSILVA, P. A. 700 1 $aPINHEIRO, H. A. 773 $tJournal of Agricultural Science$gv. 12, n. 12, p. 75-88, 2020.
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Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
16/01/2015 |
Data da última atualização: |
16/01/2015 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
CLARO, P. I. C.; BUFALINO, L.; MARCONCINI, J. M. |
Afiliação: |
JOSE MANOEL MARCONCINI, CNPDIA. |
Título: |
Estudo da propriedade mecânica de filmes de nanocelulose oriundos do madereiro da amazônia. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
In: SIMPÓSIO NACIONAL DE INSTRUMENTAÇÃO AGROPECUÁRIA, 2014, São Carlos, SP Anais do SIAGRO: ciência, inovação e mercado 2014. São Carlos, SP: Embrapa Instrumentação, 2014. p. 427-230. Editores: Carlos Manoel Pedro Vaz, Débora Marcondes Bastos Pereira Milori, Silvio Crestana. |
Idioma: |
Português |
Notas: |
Página 230 em branco |
Palavras-Chave: |
Filmes; Instrumentação - evento; Lignocelulose; Nanofibras. |
Thesagro: |
Propriedade Mecânica. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/115744/1/427siagro-2014-print01.pdf
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Marc: |
LEADER 00820nam a2200181 a 4500 001 2005838 005 2015-01-16 008 2014 bl uuuu u00u1 u #d 100 1 $aCLARO, P. I. C.; BUFALINO, L. 245 $aEstudo da propriedade mecânica de filmes de nanocelulose oriundos do madereiro da amazônia. 260 $aIn: SIMPÓSIO NACIONAL DE INSTRUMENTAÇÃO AGROPECUÁRIA, 2014, São Carlos, SP Anais do SIAGRO: ciência, inovação e mercado 2014. São Carlos, SP: Embrapa Instrumentação, 2014. p. 427-230. Editores: Carlos Manoel Pedro Vaz, Débora Marcondes Bastos Pereira Milori, Silvio Crestana.$c2014 500 $aPágina 230 em branco 650 $aPropriedade Mecânica 653 $aFilmes 653 $aInstrumentação - evento 653 $aLignocelulose 653 $aNanofibras 700 1 $aMARCONCINI, J. M.
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