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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
08/04/1999 |
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Data da última atualização: |
08/04/1999 |
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Autoria: |
MATTOS, E. A. de; REINERT, F.; MORAES, J. A. P. V. de. |
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Título: |
Comparison of carbon isotope discrimination and CO2 and H2O gas exchange between the dry and the wet season in leaves of several cerrado woody species. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Revista Brasileira de Fisiologia Vegetal, Brasilia, v.9, n.2, p.77-82, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
Carbon isotope discrimination (X) was studied in leaves of 13 woody species occurring in the Brazilian cerrado sensu stricto vegetation. Sun leaves were collected at the onset of the wet season and at the middle of the wet season prior to leaf senescence. The values among species that their leaves growing during the dry season ranged from 14.80%o in Tocoyena formosa to 20.86%o in Casearia sylvestris. In contrast, at the middle of the wet season the values ranged from 17.19%o in both Aspidosperma tomentosum and Tocoyena formosa to 22.4%o in Stryphnodendron barbadetiman. Median values of the dry season (17.69%o) were significantly lower than those of the wet season (19.24%o). The effect of the dry season on predawn leaf water potential, integrated net CO2, uptake (Aint), stomatal conductance to water vapor (Gint), intrinsic water use efficiency (Aint/Gint) and assimilation-weighed average ratio of intercellular to ambient CO2 concentration (Ci/Ca) were also assessed in Annona coriacea and Rapanea umbellata, two common woody species of the Brazilian cerrado. A decrease in was observed during the dry season. However, the values were not lower than -0.50 and -0.70 MPa in A. coriacea and R. umbellata, respectivelly. In both species, decreasing A during the dry season was associated with increasing Aint/Gint and with decreasing Ci/Ca ratio, suggesting a stomatal limitation on net CO2 uptake during the dry season. The results do not support the established idea of no stomatal restriction during the dry season for cerrado sensu stricto plants. However, it remains to be investigated if the marked decrease in stomatal conductance found here in A. coriacea and R. umbellata during the dry season can be generalized to other cerrado sensu stricto species. MenosCarbon isotope discrimination (X) was studied in leaves of 13 woody species occurring in the Brazilian cerrado sensu stricto vegetation. Sun leaves were collected at the onset of the wet season and at the middle of the wet season prior to leaf senescence. The values among species that their leaves growing during the dry season ranged from 14.80%o in Tocoyena formosa to 20.86%o in Casearia sylvestris. In contrast, at the middle of the wet season the values ranged from 17.19%o in both Aspidosperma tomentosum and Tocoyena formosa to 22.4%o in Stryphnodendron barbadetiman. Median values of the dry season (17.69%o) were significantly lower than those of the wet season (19.24%o). The effect of the dry season on predawn leaf water potential, integrated net CO2, uptake (Aint), stomatal conductance to water vapor (Gint), intrinsic water use efficiency (Aint/Gint) and assimilation-weighed average ratio of intercellular to ambient CO2 concentration (Ci/Ca) were also assessed in Annona coriacea and Rapanea umbellata, two common woody species of the Brazilian cerrado. A decrease in was observed during the dry season. However, the values were not lower than -0.50 and -0.70 MPa in A. coriacea and R. umbellata, respectivelly. In both species, decreasing A during the dry season was associated with increasing Aint/Gint and with decreasing Ci/Ca ratio, suggesting a stomatal limitation on net CO2 uptake during the dry season. The results do not support the established idea of no stomatal restri... Mostrar Tudo |
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Palavras-Chave: |
Estacao chuvosa; Estacao seca; Troca gasosa. |
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Thesagro: |
Cerrado; Planta Lenhosa. |
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Thesaurus Nal: |
dry season; gas exchange; wet season; woody plants. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02548naa a2200253 a 4500
001 1545144
005 1999-04-08
008 1997 bl --- 0-- u #d
100 1 $aMATTOS, E. A. de
245 $aComparison of carbon isotope discrimination and CO2 and H2O gas exchange between the dry and the wet season in leaves of several cerrado woody species.
260 $c1997
520 $aCarbon isotope discrimination (X) was studied in leaves of 13 woody species occurring in the Brazilian cerrado sensu stricto vegetation. Sun leaves were collected at the onset of the wet season and at the middle of the wet season prior to leaf senescence. The values among species that their leaves growing during the dry season ranged from 14.80%o in Tocoyena formosa to 20.86%o in Casearia sylvestris. In contrast, at the middle of the wet season the values ranged from 17.19%o in both Aspidosperma tomentosum and Tocoyena formosa to 22.4%o in Stryphnodendron barbadetiman. Median values of the dry season (17.69%o) were significantly lower than those of the wet season (19.24%o). The effect of the dry season on predawn leaf water potential, integrated net CO2, uptake (Aint), stomatal conductance to water vapor (Gint), intrinsic water use efficiency (Aint/Gint) and assimilation-weighed average ratio of intercellular to ambient CO2 concentration (Ci/Ca) were also assessed in Annona coriacea and Rapanea umbellata, two common woody species of the Brazilian cerrado. A decrease in was observed during the dry season. However, the values were not lower than -0.50 and -0.70 MPa in A. coriacea and R. umbellata, respectivelly. In both species, decreasing A during the dry season was associated with increasing Aint/Gint and with decreasing Ci/Ca ratio, suggesting a stomatal limitation on net CO2 uptake during the dry season. The results do not support the established idea of no stomatal restriction during the dry season for cerrado sensu stricto plants. However, it remains to be investigated if the marked decrease in stomatal conductance found here in A. coriacea and R. umbellata during the dry season can be generalized to other cerrado sensu stricto species.
650 $adry season
650 $agas exchange
650 $awet season
650 $awoody plants
650 $aCerrado
650 $aPlanta Lenhosa
653 $aEstacao chuvosa
653 $aEstacao seca
653 $aTroca gasosa
700 1 $aREINERT, F.
700 1 $aMORAES, J. A. P. V. de
773 $tRevista Brasileira de Fisiologia Vegetal, Brasilia$gv.9, n.2, p.77-82, 1997.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Origem |
Tipo/Formato |
Classificação |
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Registro |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
12/03/2015 |
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Data da última atualização: |
30/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
DAHER, R. F.; SOUZA, M. C. DE; GRAVINA, G. DE A.; MACHADO, J. C.; RAMOS, H. C. C.; SILVA, V. Q. R.; MENEZES, B. R. S.; SCHNEIDER, L. S. A.; OLIVEIRA, M. L. F.; GOTTARDO, R. D. |
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Afiliação: |
JUAREZ CAMPOLINA MACHADO, CNPGL; H. C. C. RAMOS; V. Q. R. SILVA; B. R. S. MENEZES; L. S. A. SCHNEIDER; M. L. F. OLIVEIRA; R. D. GOTTARDO. |
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Título: |
Use of elephant grass for energy production in Campos dos Goytacazes-RJ, Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 13, n. 4, p. 10898-10908, 2014. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Diallel; Quality traits. |
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Thesaurus NAL: |
additive effect; biomass; hybrids. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/120287/1/Cnpgl-2014-GMR-Use-of-elephant-grass-gmr46052.pdf
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Marc: |
LEADER 00809naa a2200277 a 4500
001 2011304
005 2024-01-30
008 2014 bl uuuu u00u1 u #d
100 1 $aDAHER, R. F.
245 $aUse of elephant grass for energy production in Campos dos Goytacazes-RJ, Brazil.$h[electronic resource]
260 $c2014
650 $aadditive effect
650 $abiomass
650 $ahybrids
653 $aDiallel
653 $aQuality traits
700 1 $aSOUZA, M. C. DE
700 1 $aGRAVINA, G. DE A.
700 1 $aMACHADO, J. C.
700 1 $aRAMOS, H. C. C.
700 1 $aSILVA, V. Q. R.
700 1 $aMENEZES, B. R. S.
700 1 $aSCHNEIDER, L. S. A.
700 1 $aOLIVEIRA, M. L. F.
700 1 $aGOTTARDO, R. D.
773 $tGenetics and Molecular Research$gv. 13, n. 4, p. 10898-10908, 2014.
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Embrapa Gado de Leite (CNPGL) |
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