| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
21/03/2017 |
|
Data da última atualização: |
22/12/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
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. |
|
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. |
|
Título: |
Drought tolerance in two oil palm hybrids as related to adjustments in carbon metabolism and vegetative growth. |
|
Ano de publicação: |
2017 |
|
Fonte/Imprenta: |
Acta Physiologiae Plantarum, v. 39, n. 2, p. 1-12, 2017. |
|
DOI: |
10.1007/s11738-017-2354-4 |
|
Idioma: |
Inglês |
|
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 |
|
Palavras-Chave: |
Déficit de água; Palma de óleo. |
|
Thesagro: |
Carbono; Fotossíntese. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
Marc: |
null
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 2 | |
| 1. |  | SILVA, L. L. D.; BARBOSA, E. T.; JUNIOR, M. L. Densidade populacional de patógenos e antagonistas habitantes do solo em regiões produtoras de feijoeiro comum. Tropical Plant Pathology, Brasília, DF, v. 38, p. 575, ago. 2013. Suplemento. ref. 191-2. Edição dos Resumos do XLVI Congresso Brasileiro de Fitopatologia, Ouro Preto, MG, ago. 2013.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
|    |
| 2. | | BARBOSA, E. T.; SILVA, L. L. D.; YOSHIDA, F.; JUNIOR, M. L. Utilização de diferentes fontes de carbono por isolados de Fusarium solani. Tropical Plant Pathology, Brasília, DF, v. 38, p. 692, ago. 2013. Suplemento. ref. 720-1. Edição dos Resumos do XLVI Congresso Brasileiro de Fitopatologia, Ouro Preto, MG, ago. 2013.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
| |
| Registros recuperados : 2 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
