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Registro Completo |
Biblioteca(s): |
Embrapa Agroindústria Tropical. |
Data corrente: |
29/12/1995 |
Data da última atualização: |
11/11/2011 |
Autoria: |
SILVA, S. de O. E.; SOUZA, F. V. D.; PAZ, O. P. da; MONTAEEOYOS, A. V. V.; SILVA, K. M. da. |
Título: |
Biotenologia na EMBRAPA/CNPMF. |
Ano de publicação: |
1994 |
Fonte/Imprenta: |
Cruz das Almas: EMBRAPA-CNPMF, 1994. |
Páginas: |
2P. |
Série: |
(EMBRAPA-CNPMF BIOTENOLOGIA EM FOCO, 1) |
Idioma: |
Inglês |
Conteúdo: |
O laboratorio de biotecnologia do CNPMF/EMBRAPA, criado em 1991 a partir da fusao dos antigos laboratorios de virologia, citologia e cultura de tecidos, vem conduzindo trabalhos de apoio aos programas de melhoramento vegetal executados nesta unidade. A necessidade de se obter mudas sadias de material selecionada de banana e abacaxi por meio de cultura de tecidos tem sido uma preocupacap constante neste Centro e vem gerando uma serie de trabalhos que visam o estabelecimento de protocolos seguros de micropropagacao. NO caso especifico de banana, um controle da estabilidade genetica das plantas obtidas por cultura de tecidos tem sido feito por meio de avaliacoes citologicas (contagem de ccromossomos). |
Palavras-Chave: |
Bnana; Cultura de tecidos; Embrapa - CNPMF - biotecnologia; Micronutrientes. |
Thesagro: |
Abacaxi. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01349nam a2200241 a 4500 001 1419452 005 2011-11-11 008 1994 bl uuuu u0uu1 u #d 100 1 $aSILVA, S. de O. E. 245 $aBiotenologia na EMBRAPA/CNPMF. 260 $aCruz das Almas: EMBRAPA-CNPMF$c1994 300 $a2P. 490 $a(EMBRAPA-CNPMF BIOTENOLOGIA EM FOCO, 1) 520 $aO laboratorio de biotecnologia do CNPMF/EMBRAPA, criado em 1991 a partir da fusao dos antigos laboratorios de virologia, citologia e cultura de tecidos, vem conduzindo trabalhos de apoio aos programas de melhoramento vegetal executados nesta unidade. A necessidade de se obter mudas sadias de material selecionada de banana e abacaxi por meio de cultura de tecidos tem sido uma preocupacap constante neste Centro e vem gerando uma serie de trabalhos que visam o estabelecimento de protocolos seguros de micropropagacao. NO caso especifico de banana, um controle da estabilidade genetica das plantas obtidas por cultura de tecidos tem sido feito por meio de avaliacoes citologicas (contagem de ccromossomos). 650 $aAbacaxi 653 $aBnana 653 $aCultura de tecidos 653 $aEmbrapa - CNPMF - biotecnologia 653 $aMicronutrientes 700 1 $aSOUZA, F. V. D. 700 1 $aPAZ, O. P. da 700 1 $aMONTAEEOYOS, A. V. V. 700 1 $aSILVA, K. M. da
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Embrapa Agroindústria Tropical (CNPAT) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
15/03/2017 |
Data da última atualização: |
20/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
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. |
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. |
Título: |
Leaf gas exchange and multiple enzymatic and non-enzymatic antioxidant strategies related to drought tolerance in two oil palm hybrids. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Trees, v. 30, n. 1, p. 203-214, Feb. 2016. |
DOI: |
10.1007/s00468-015-1289-x |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Compostos antioxidantes; Déficit hídrico; Enzimas antioxidantes; Palma de óleo. |
Thesagro: |
Elaeis Guineensis; Elaeis Oleifera. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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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