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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: |
21/03/2017 |
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Data da última atualização: |
22/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, P. A.; COSME, V. S.; RORIGUES, K. C. B.; DETMANN, K. S. C.; LEÃO, F. M.; CUNHA, R. L.; BUSELLI, R. A. F.; DAMATTA, F. M.; PINHEIRO, H. A. |
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Afiliação: |
Priscilla A. Silva, UFRA; Vanessa S. Cosme, UFRA; Kátia C. B. Rodrigues, UFRA; Kelly S. C. Detmann, UFV; Fábio M. Leão, UFPA; ROBERTO LISBOA CUNHA, CPATU; Reginaldo A. Festucci Buselli, UFRA; Fábio M. DaMatta, UFV; Hugo A. Pinheiro, UFRA. |
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Título: |
Drought tolerance in two oil palm hybrids as related to adjustments in carbon metabolism and vegetative growth. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Acta Physiologiae Plantarum, v. 39, n. 2, p. 1-12, 2017. |
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DOI: |
10.1007/s11738-017-2354-4 |
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Idioma: |
Inglês |
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Conteúdo: |
Drought tolerance was examined in two oil palm hybrids (BRS Manicoré and BRS C 2501) grown in large pots and subjected to long-term drought (57 days) and rehydration. Regardless of hybrids, predawn water potential (Ψpd), net photosynthesis rates, and stomatal conductance decreased similarly upon drought imposition, but the absolute values of these variables were lower in BRS C 2501 than in BRS Manicoré. Overall, drought-induced decreases in activities of key enzymes associated with carbon metabolism, including Rubisco, ADP-glucose pyrophosphorylase, and sucrose-phosphate synthase, were stronger in BRS C 2501 than in BRS Manicoré. Our data suggest that synthesis of starch (and possibly sucrose) was fundamentally limited by a lower substrate availability rather than by enzymatic constraints, particularly until day 34 after suspending watering. Drought stress provoked similar decreases in biomass accumulation in either hybrid; however, BRS Manicoré plants displayed higher total leaf area and root length coupled with greater relative decreases in dry matter of above-ground parts than of roots as compared to BRS C 2501, thereby leading to an increased root-to-above ground ratio in the former. Upon resuming irrigation, the slow recovery of Ψpd preceded the recovery of stomatal conductance and photosynthesis irrespective of hybrid. BRS Manicoré was better able to recover enzyme activities and carbohydrate status than BRS C 2501. In conclusion, both hybrids could tolerate (or survive) the severe drought conditions, but, overall, BRS Manicoré plants were better able to adjust its physiological, morphological, and biochemical traits to cope with drought than did BRS C 2501. MenosDrought tolerance was examined in two oil palm hybrids (BRS Manicoré and BRS C 2501) grown in large pots and subjected to long-term drought (57 days) and rehydration. Regardless of hybrids, predawn water potential (Ψpd), net photosynthesis rates, and stomatal conductance decreased similarly upon drought imposition, but the absolute values of these variables were lower in BRS C 2501 than in BRS Manicoré. Overall, drought-induced decreases in activities of key enzymes associated with carbon metabolism, including Rubisco, ADP-glucose pyrophosphorylase, and sucrose-phosphate synthase, were stronger in BRS C 2501 than in BRS Manicoré. Our data suggest that synthesis of starch (and possibly sucrose) was fundamentally limited by a lower substrate availability rather than by enzymatic constraints, particularly until day 34 after suspending watering. Drought stress provoked similar decreases in biomass accumulation in either hybrid; however, BRS Manicoré plants displayed higher total leaf area and root length coupled with greater relative decreases in dry matter of above-ground parts than of roots as compared to BRS C 2501, thereby leading to an increased root-to-above ground ratio in the former. Upon resuming irrigation, the slow recovery of Ψpd preceded the recovery of stomatal conductance and photosynthesis irrespective of hybrid. BRS Manicoré was better able to recover enzyme activities and carbohydrate status than BRS C 2501. In conclusion, both hybrids could tolerate ... Mostrar Tudo |
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Palavras-Chave: |
Déficit de água; Palma de óleo. |
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Thesagro: |
Carbono; Fotossíntese. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02540naa a2200277 a 4500
001 2067373
005 2021-12-22
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1007/s11738-017-2354-4$2DOI
100 1 $aSILVA, P. A.
245 $aDrought tolerance in two oil palm hybrids as related to adjustments in carbon metabolism and vegetative growth.$h[electronic resource]
260 $c2017
520 $aDrought tolerance was examined in two oil palm hybrids (BRS Manicoré and BRS C 2501) grown in large pots and subjected to long-term drought (57 days) and rehydration. Regardless of hybrids, predawn water potential (Ψpd), net photosynthesis rates, and stomatal conductance decreased similarly upon drought imposition, but the absolute values of these variables were lower in BRS C 2501 than in BRS Manicoré. Overall, drought-induced decreases in activities of key enzymes associated with carbon metabolism, including Rubisco, ADP-glucose pyrophosphorylase, and sucrose-phosphate synthase, were stronger in BRS C 2501 than in BRS Manicoré. Our data suggest that synthesis of starch (and possibly sucrose) was fundamentally limited by a lower substrate availability rather than by enzymatic constraints, particularly until day 34 after suspending watering. Drought stress provoked similar decreases in biomass accumulation in either hybrid; however, BRS Manicoré plants displayed higher total leaf area and root length coupled with greater relative decreases in dry matter of above-ground parts than of roots as compared to BRS C 2501, thereby leading to an increased root-to-above ground ratio in the former. Upon resuming irrigation, the slow recovery of Ψpd preceded the recovery of stomatal conductance and photosynthesis irrespective of hybrid. BRS Manicoré was better able to recover enzyme activities and carbohydrate status than BRS C 2501. In conclusion, both hybrids could tolerate (or survive) the severe drought conditions, but, overall, BRS Manicoré plants were better able to adjust its physiological, morphological, and biochemical traits to cope with drought than did BRS C 2501.
650 $aCarbono
650 $aFotossíntese
653 $aDéficit de água
653 $aPalma de óleo
700 1 $aCOSME, V. S.
700 1 $aRORIGUES, K. C. B.
700 1 $aDETMANN, K. S. C.
700 1 $aLEÃO, F. M.
700 1 $aCUNHA, R. L.
700 1 $aBUSELLI, R. A. F.
700 1 $aDAMATTA, F. M.
700 1 $aPINHEIRO, H. A.
773 $tActa Physiologiae Plantarum$gv. 39, n. 2, p. 1-12, 2017.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
10/12/2014 |
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Data da última atualização: |
10/12/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
TEIXEIRA, W. G.; PLENS, C. R.; MACEDO, R. S.; FIGUTI, L. |
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Afiliação: |
WENCESLAU GERALDES TEIXEIRA, CNPS; CLÁUDIA REGINA PLENS, UNIFESP; RODRIGO SANTANA MACEDO, ESALQ; LEVY FIGUTI, USP. |
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Título: |
Caracterização de um perfil de solo desenvolvido no sambaqui fluvial Moraes, município de Miracatu - SP. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Revista do Museu de Arqueologia e Etnologia, São Paulo, n. 22, p. 181-194, 2012. |
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Idioma: |
Português |
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Palavras-Chave: |
Análise de solo; Caçadores-coletores; Processo de formação; Sambaqui fluvial; Terra preta de índio. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/113504/1/Teixeira-et-al-Sambaquis-em-Miracatu-Rev-Bras-Arq-2012.pdf
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Marc: |
LEADER 00686naa a2200205 a 4500
001 2002182
005 2014-12-10
008 2012 bl uuuu u00u1 u #d
100 1 $aTEIXEIRA, W. G.
245 $aCaracterização de um perfil de solo desenvolvido no sambaqui fluvial Moraes, município de Miracatu - SP.$h[electronic resource]
260 $c2012
653 $aAnálise de solo
653 $aCaçadores-coletores
653 $aProcesso de formação
653 $aSambaqui fluvial
653 $aTerra preta de índio
700 1 $aPLENS, C. R.
700 1 $aMACEDO, R. S.
700 1 $aFIGUTI, L.
773 $tRevista do Museu de Arqueologia e Etnologia, São Paulo$gn. 22, p. 181-194, 2012.
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