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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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| Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
09/03/2009 |
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Data da última atualização: |
09/03/2009 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
ARAGÃO, F. J. L.; FARIA, J. C. |
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Afiliação: |
Francisco José Lima Aragão, Cenargen; Josias Corrêa de Faria, CNPAF. |
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Título: |
Bean improvement through genetic engineering towards the generation of the first commercial transgenic varieties. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON LEGUME GENOMICS AND GENETICS, 4, 2008, Puerto Vallarta, México. Book of abstracts. Mexico: Universidad Nacional Autónoma de México, 2008. |
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Páginas: |
p. 26. |
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Idioma: |
Inglês |
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Thesagro: |
Biotecnologia; Engenharia Genética; Feijão; Phaseolus Vulgaris. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00674naa a2200181 a 4500
001 1216272
005 2009-03-09
008 2008 bl uuuu u00u1 u #d
100 1 $aARAGÃO, F. J. L.
245 $aBean improvement through genetic engineering towards the generation of the first commercial transgenic varieties.
260 $c2008
300 $ap. 26.
650 $aBiotecnologia
650 $aEngenharia Genética
650 $aFeijão
650 $aPhaseolus Vulgaris
700 1 $aFARIA, J. C.
773 $tIn: INTERNATIONAL CONFERENCE ON LEGUME GENOMICS AND GENETICS, 4, 2008, Puerto Vallarta, México. Book of abstracts. Mexico: Universidad Nacional Autónoma de México, 2008.
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Embrapa Arroz e Feijão (CNPAF) |
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