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 | Acesso ao texto completo restrito à biblioteca da Biblioteca Rui Tendinha. Para informações adicionais entre em contato com biblioteca@incaper.es.gov.br. |
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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
13/01/2015 |
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Data da última atualização: |
13/01/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PRAXEDES, S. C.; DAMATTA, F. M.; LOUREIRO, M. E.; FERRÃO, M. A. G.; CORDEIRO, A. T. |
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Afiliação: |
Sidney C. Praxedes; Fábio M. DaMatta; Marcelo E. Loureiro; Maria Amélia Gava Ferrão, Incaper/Embrapa Café; Antônio T. Cordeiro. |
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Título: |
Effects of long-term soil drought on photosynthesis and carbohydrate metabolism in mature robusta coffee (Coffea canephora Pierre var. kouillou) leaves. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Environmental and Experimental Botany, v. 56, n. 3, p. 263-273, 2006, |
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Idioma: |
Inglês |
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Conteúdo: |
Four clones of robusta coffee representing drought-tolerant (14 and 120) and drought-sensitive (46 and 109A) genotypes were submitted to a slowly imposed water deficit. Sampling and measurements were performed when predawn leaf water potential (Ψpd) approximately −2.0 and −3.0 MPa was reached. Regardless of the clone evaluated, drought led to sharper decreases in stomatal conductance than in photosynthesis, which was accompanied by significant declines in internal to ambient CO2 concentration ratio. Little or no effect of drought on chlorophyll a fluorescence parameters was observed. Regardless of the stress intensity, starch decreased remarkably. This was not accompanied by significant changes in concentration of soluble sugars, with the exception of clone 120 in which a rise in sucrose and hexose concentrations was found when Ψpd reached −3.0 MPa. At Ψpd = −2.0 MPa, activity of acid invertase increased only in clone 120; at Ψpd = −3.0 MPa, it increased in clones 14, 46 and 120, while activity of sucrose synthase declined, but only in clone 109A. Drought-induced decrease in ADP-glucose pyrophosphorylase activity was found only in clones 14 and 46, irrespective of stress intensity. At Ψpd = −3.0 MPa, maximal extractable and activation state of sucrose-phosphate synthase (SPS) decreased in all clones with the exception of clone 120, in which SPS activity was maintained in parallel to a rising activity of fructose-1,6-bisphosphatase. Changes in SPS activity could neither be explained by the CO2 decrease linked to stomatal closure nor by differences in leaf water status. MenosFour clones of robusta coffee representing drought-tolerant (14 and 120) and drought-sensitive (46 and 109A) genotypes were submitted to a slowly imposed water deficit. Sampling and measurements were performed when predawn leaf water potential (Ψpd) approximately −2.0 and −3.0 MPa was reached. Regardless of the clone evaluated, drought led to sharper decreases in stomatal conductance than in photosynthesis, which was accompanied by significant declines in internal to ambient CO2 concentration ratio. Little or no effect of drought on chlorophyll a fluorescence parameters was observed. Regardless of the stress intensity, starch decreased remarkably. This was not accompanied by significant changes in concentration of soluble sugars, with the exception of clone 120 in which a rise in sucrose and hexose concentrations was found when Ψpd reached −3.0 MPa. At Ψpd = −2.0 MPa, activity of acid invertase increased only in clone 120; at Ψpd = −3.0 MPa, it increased in clones 14, 46 and 120, while activity of sucrose synthase declined, but only in clone 109A. Drought-induced decrease in ADP-glucose pyrophosphorylase activity was found only in clones 14 and 46, irrespective of stress intensity. At Ψpd = −3.0 MPa, maximal extractable and activation state of sucrose-phosphate synthase (SPS) decreased in all clones with the exception of clone 120, in which SPS activity was maintained in parallel to a rising activity of fructose-1,... Mostrar Tudo |
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Thesaurus NAL: |
Carbon metabolism; Chlorophyll fluorescence; Coffee; Gas exchange; Sucrose-phosphate synthase; Water deficit. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02453naa a2200241 a 4500
001 1004903
005 2015-01-13
008 2006 bl uuuu u00u1 u #d
100 1 $aPRAXEDES, S. C.
245 $aEffects of long-term soil drought on photosynthesis and carbohydrate metabolism in mature robusta coffee (Coffea canephora Pierre var. kouillou) leaves.$h[electronic resource]
260 $c2006
520 $aFour clones of robusta coffee representing drought-tolerant (14 and 120) and drought-sensitive (46 and 109A) genotypes were submitted to a slowly imposed water deficit. Sampling and measurements were performed when predawn leaf water potential (Ψpd) approximately −2.0 and −3.0 MPa was reached. Regardless of the clone evaluated, drought led to sharper decreases in stomatal conductance than in photosynthesis, which was accompanied by significant declines in internal to ambient CO2 concentration ratio. Little or no effect of drought on chlorophyll a fluorescence parameters was observed. Regardless of the stress intensity, starch decreased remarkably. This was not accompanied by significant changes in concentration of soluble sugars, with the exception of clone 120 in which a rise in sucrose and hexose concentrations was found when Ψpd reached −3.0 MPa. At Ψpd = −2.0 MPa, activity of acid invertase increased only in clone 120; at Ψpd = −3.0 MPa, it increased in clones 14, 46 and 120, while activity of sucrose synthase declined, but only in clone 109A. Drought-induced decrease in ADP-glucose pyrophosphorylase activity was found only in clones 14 and 46, irrespective of stress intensity. At Ψpd = −3.0 MPa, maximal extractable and activation state of sucrose-phosphate synthase (SPS) decreased in all clones with the exception of clone 120, in which SPS activity was maintained in parallel to a rising activity of fructose-1,6-bisphosphatase. Changes in SPS activity could neither be explained by the CO2 decrease linked to stomatal closure nor by differences in leaf water status.
650 $aCarbon metabolism
650 $aChlorophyll fluorescence
650 $aCoffee
650 $aGas exchange
650 $aSucrose-phosphate synthase
650 $aWater deficit
700 1 $aDAMATTA, F. M.
700 1 $aLOUREIRO, M. E.
700 1 $aFERRÃO, M. A. G.
700 1 $aCORDEIRO, A. T.
773 $tEnvironmental and Experimental Botany$gv. 56, n. 3, p. 263-273, 2006
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Biblioteca Rui Tendinha (BRT) |
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| Registros recuperados : 5 | |
| 1. |  | PRAXEDES, S. C.; DAMATTA, F. M.; LOUREIRO, M. E.; FERRÃO, M. A. G.; CORDEIRO, A. T. Effects of long-term soil drought on photosynthesis and carbohydrate metabolism in mature robusta coffee (Coffea canephora Pierre var. kouillou) leaves. Environmental and Experimental Botany, v. 56, n. 3, p. 263-273, 2006,| Tipo: Artigo em Periódico Indexado | Circulação/Nível: - - - |
| Biblioteca(s): Biblioteca Rui Tendinha. |
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| 3. | | BARBOSA, W. M.; MEIRA, R. M. S. A.; CORDEIRO, A. T.; OTONI, W. C.; SAKIYAMA, N. S. S. Análise histólica comparativa da inundação de calos em genótipos de coffea. In: Simpósio de Pesquisa dos Cafés do Brasil, 5., 2007, Águas de Lindóia. Anais. Brasília, D.F. : Embrapa Café, 2007. 4p.| Tipo: Publicação em Anais de Congresso |
| Biblioteca(s): Biblioteca Rui Tendinha. |
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| 4. | | GUIMARÃES, L. A. de O. P. G.; ASSIS, I. R.; DIAS, L. E.; CORDEIRO, A. L.; FREIRE, A. S. Espécies arbóreas potenciais para a revegetação de rejeito salino contaminado por arsênio. Ciência Florestal, Santa Maria, v. 27, n. 3, p. 871-881, Sept. 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Biblioteca Rui Tendinha. |
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| Registros recuperados : 5 | |
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