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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: |
04/12/2023 |
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Data da última atualização: |
28/02/2024 |
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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.; FERREIRA, I. V. L.; CORREA, L. O.; CUNHA, R. L.; PINHEIRO, H. A. |
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Afiliação: |
WAGNER ROMULO LIMA LOPES FILHO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; FLAVIO HENRIQUE SANTOS RODRIGUES, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; IZABELY VITÓRIA LUCAS FERREIRA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; LORENA OLIVEIRA CORREA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; ROBERTO LISBOA CUNHA, CPATU; HUGO ALVES PINHEIRO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA. |
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Título: |
Physiological responses of young oil palm (Elaeis guineensis Jacq.) plants to repetitive water deficit events. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Industrial Crops & Products, v. 172, Article 114052, 2021. |
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DOI: |
https://doi.org/10.1016/j.indcrop.2021.114052 |
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Idioma: |
Inglês |
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Conteúdo: |
Stomatal and non-stomatal limitations to photosynthesis and acclimation of the photosynthetic machinery to repetitive water deficit (WD) events were investigated in oil palms (Elaeis guineensis Jacq.). For this, well-watered plants (control treatment) were compared with plants subjected to one, two, and three WD events imposed by withholding irrigation until their predawn leaf water potential (Tpd) reached around -2.5 MPa. Treatment comparisons were performed over 28 days. The Tpd decreased equally between WD treatments. Decreases in net CO2 assimilation rate (A) were similar between stressed plants until day 7. In the following days, the A was higher in plants thrice stressed than in those stressed once. Stomatal conductance decreased similarly between WD treatments, but mesophyll conductance to CO2 was lower in plants subjected to a single WD. Chloroplast CO2 concentration decreased similarly between plants subjected to one and three WD events until day 14, but it was lower in the former on subsequent days. Plants subjected to a single WD event showed lower Ribulose 1,5 bisphosphate carboxylase/oxygenase (Rubisco) activity, maximum rate of electron transport (Jmax), and higher rates of photorespiration and dark respiration than other treatments. Plants subjected to one WD event also showed lower maximum quantum efficiency of photosystem II (PSII) photochemistry and PSII maximum efficiency concomitantly with higher malondialdehyde content. The results support that repetitive WD events induce the acclimation of the photosynthetic machinery in oil palm through adjustments in carboxylase Rubisco activity, Jmax, photorespiration, and respiration rates, as well as attenuating oxidative damages to PSII and membrane lipids. MenosStomatal and non-stomatal limitations to photosynthesis and acclimation of the photosynthetic machinery to repetitive water deficit (WD) events were investigated in oil palms (Elaeis guineensis Jacq.). For this, well-watered plants (control treatment) were compared with plants subjected to one, two, and three WD events imposed by withholding irrigation until their predawn leaf water potential (Tpd) reached around -2.5 MPa. Treatment comparisons were performed over 28 days. The Tpd decreased equally between WD treatments. Decreases in net CO2 assimilation rate (A) were similar between stressed plants until day 7. In the following days, the A was higher in plants thrice stressed than in those stressed once. Stomatal conductance decreased similarly between WD treatments, but mesophyll conductance to CO2 was lower in plants subjected to a single WD. Chloroplast CO2 concentration decreased similarly between plants subjected to one and three WD events until day 14, but it was lower in the former on subsequent days. Plants subjected to a single WD event showed lower Ribulose 1,5 bisphosphate carboxylase/oxygenase (Rubisco) activity, maximum rate of electron transport (Jmax), and higher rates of photorespiration and dark respiration than other treatments. Plants subjected to one WD event also showed lower maximum quantum efficiency of photosystem II (PSII) photochemistry and PSII maximum efficiency concomitantly with higher malondialdehyde content. The results support that repetitiv... Mostrar Tudo |
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Thesagro: |
Água; Dendê; Elaeis Guineensis. |
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Thesaurus Nal: |
Photorespiration. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02511naa a2200241 a 4500
001 2159136
005 2024-02-28
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.indcrop.2021.114052$2DOI
100 1 $aLOPES FILHO, W. R. L.
245 $aPhysiological responses of young oil palm (Elaeis guineensis Jacq.) plants to repetitive water deficit events.$h[electronic resource]
260 $c2021
520 $aStomatal and non-stomatal limitations to photosynthesis and acclimation of the photosynthetic machinery to repetitive water deficit (WD) events were investigated in oil palms (Elaeis guineensis Jacq.). For this, well-watered plants (control treatment) were compared with plants subjected to one, two, and three WD events imposed by withholding irrigation until their predawn leaf water potential (Tpd) reached around -2.5 MPa. Treatment comparisons were performed over 28 days. The Tpd decreased equally between WD treatments. Decreases in net CO2 assimilation rate (A) were similar between stressed plants until day 7. In the following days, the A was higher in plants thrice stressed than in those stressed once. Stomatal conductance decreased similarly between WD treatments, but mesophyll conductance to CO2 was lower in plants subjected to a single WD. Chloroplast CO2 concentration decreased similarly between plants subjected to one and three WD events until day 14, but it was lower in the former on subsequent days. Plants subjected to a single WD event showed lower Ribulose 1,5 bisphosphate carboxylase/oxygenase (Rubisco) activity, maximum rate of electron transport (Jmax), and higher rates of photorespiration and dark respiration than other treatments. Plants subjected to one WD event also showed lower maximum quantum efficiency of photosystem II (PSII) photochemistry and PSII maximum efficiency concomitantly with higher malondialdehyde content. The results support that repetitive WD events induce the acclimation of the photosynthetic machinery in oil palm through adjustments in carboxylase Rubisco activity, Jmax, photorespiration, and respiration rates, as well as attenuating oxidative damages to PSII and membrane lipids.
650 $aPhotorespiration
650 $aÁgua
650 $aDendê
650 $aElaeis Guineensis
700 1 $aRODRIGUES, F. H. S.
700 1 $aFERREIRA, I. V. L.
700 1 $aCORREA, L. O.
700 1 $aCUNHA, R. L.
700 1 $aPINHEIRO, H. A.
773 $tIndustrial Crops & Products$gv. 172, Article 114052, 2021.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
23/10/2001 |
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Data da última atualização: |
17/10/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
SABOURIN, E.; CARON, P.; SILVA, P. C. G. da. |
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Afiliação: |
Eric Sabourin, CIRAD; Patrick Caron, CIRAD; PEDRO CARLOS GAMA DA SILVA, CPATSA. |
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Título: |
O manejo dos "fundos de pasto" no nordeste baiano: um exemplo de reforma agraria sustentavel. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Raízes - Revista de Ciências Sociais e Econômicas, Campina Grande, v.18, n.2, p.90-102, nov. 1999. |
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ISSN: |
0102-552X |
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Idioma: |
Português |
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Conteúdo: |
No Sertao baiano, as terras chamadas de Fundo de Pasto, antigas áreas devolutas, tem sido objeto de um projeto publico de regularizacao de titulos de propriedade coletiva. O artigo situa essa experiencia no marco da historia fundiaria do Nordeste brasileiro e analisa as estrategias dos atores engajados no manejo dessas terras, em particular as comunidades de Massaroca (Juazeiro-BA). A evolucao do contexto economico nos anos 70 e a mutacao rapida dos sistemas de producao tem modificado o uso dos Fundos de Pasto. As organizacoes de produtores sao confrontadas com novas formas de manejo das terras comuns e com negociacoes para tomadas de decisoes individuais e colitivas. Esse quadro original de uso e redistribuicao da terra constitui um verdadeiro laboratorio em materia de reforma agraria descentralizada e e sustentavel, assim como de preservacao das ultimas areas de vegetacao de caatinga. |
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Palavras-Chave: |
Agrarian reform; Bahia; Fundo de pasto; Legislação fundiária; Organização fundiária; Pequeno produtor rural; Small farmers; Sustentabilidade da caprinocultura; Terras devolutas. |
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Thesagro: |
Agricultura familiar; Desenvolvimento rural; Estrutura agrária; Posse de terra. |
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Thesaurus NAL: |
Rural development. |
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Categoria do assunto: |
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPATSA/8979/1/OPB1280.pdf
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Marc: |
LEADER 01898naa a2200325 a 4500
001 1134352
005 2013-10-17
008 1999 bl uuuu u00u1 u #d
022 $a0102-552X
100 1 $aSABOURIN, E.
245 $aO manejo dos "fundos de pasto" no nordeste baiano$bum exemplo de reforma agraria sustentavel.
260 $c1999
520 $aNo Sertao baiano, as terras chamadas de Fundo de Pasto, antigas áreas devolutas, tem sido objeto de um projeto publico de regularizacao de titulos de propriedade coletiva. O artigo situa essa experiencia no marco da historia fundiaria do Nordeste brasileiro e analisa as estrategias dos atores engajados no manejo dessas terras, em particular as comunidades de Massaroca (Juazeiro-BA). A evolucao do contexto economico nos anos 70 e a mutacao rapida dos sistemas de producao tem modificado o uso dos Fundos de Pasto. As organizacoes de produtores sao confrontadas com novas formas de manejo das terras comuns e com negociacoes para tomadas de decisoes individuais e colitivas. Esse quadro original de uso e redistribuicao da terra constitui um verdadeiro laboratorio em materia de reforma agraria descentralizada e e sustentavel, assim como de preservacao das ultimas areas de vegetacao de caatinga.
650 $aRural development
650 $aAgricultura familiar
650 $aDesenvolvimento rural
650 $aEstrutura agrária
650 $aPosse de terra
653 $aAgrarian reform
653 $aBahia
653 $aFundo de pasto
653 $aLegislação fundiária
653 $aOrganização fundiária
653 $aPequeno produtor rural
653 $aSmall farmers
653 $aSustentabilidade da caprinocultura
653 $aTerras devolutas
700 1 $aCARON, P.
700 1 $aSILVA, P. C. G. da
773 $tRaízes - Revista de Ciências Sociais e Econômicas, Campina Grande$gv.18, n.2, p.90-102, nov. 1999.
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