|
|
 | 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: |
22/02/2010 |
Data da última atualização: |
16/11/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CORDEIRO, Y. E. M.; PINHEIRO, H. A.; SANTOS FILHO, B. G. dos; CORREA, S. S.; SILVA, J. R. R. e; DIAS-FILHO, M. B. |
Afiliação: |
UFRA; UFRA; UFRA; UFRA; UFRA; MOACYR BERNARDINO DIAS FILHO, CPATU. |
Título: |
Physiological and morphological responses of young mahogany (Swietenia macrophylla King) plants to drought. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
Forest Ecology and Management, v. 258, n. 7, p. 1449-1455, Sep. 2009. |
DOI: |
10.1016/j.foreco.2009.06.054 |
Idioma: |
Inglês |
Conteúdo: |
Young mahogany (Swietenia macrophylla King) plants were grown under either well-watered (pre-dawn leaf water potential, ?pd, ca. ?0.40 MPa) or drought (?pd, ca. ?3.52 MPa) conditions to examine some physiological strategies that allow the maintenance of leaf turgor. In well-watered plants, stomatal conductance (gs) was nearly constant (440 mmol m?2 s?1) between 7:00 and 13:00 h. This was accomplished by significant increases in transpiration (E) and apparent total hydraulic conductance (KT), in which averages were higher at 13:00 h. From 13:00 to 17:00 h, gs, E, and KT decreased sharply, reaching their lower values at 17:00 h. In these plants, significant increases in height (116%), stem diameter (50%) and leaf area (200%) were registered over the experimental period (20 days). Analyses of linear regression between gs or E and leaf-to-air vapor pressure deficit (?w) were not significant. In water-stressed plants, gs and E were higher at 7:00 h and lower from 9:00 to 17:00 h, while KT was higher in early morning (7:00 h) and in late afternoon (17:00 h) than between 9:00 and 15:00 h. Moreover, both gs and E decreased potentially (P < 0.001) with the diurnal increases on ?w. Drought also decreased leaf and leaflet numbers and reduced total leaf area, but had no effect on stem height and diameter. Leaf proline was higher (ca. 400%, between 13:00 and 15:00 h) in water-stressed plants, suggesting osmotic adjustment under drought. Twelve hours after resumption of irrigation, ?pd was similar (P > 0.05) between well-watered and drought-stressed plants, suggesting an ability of plants to recover turgor after stress cessation. Altogether, our data support the hypothesis that young mahogany plants have the ability to satisfactorily tolerate or postpone drought. MenosYoung mahogany (Swietenia macrophylla King) plants were grown under either well-watered (pre-dawn leaf water potential, ?pd, ca. ?0.40 MPa) or drought (?pd, ca. ?3.52 MPa) conditions to examine some physiological strategies that allow the maintenance of leaf turgor. In well-watered plants, stomatal conductance (gs) was nearly constant (440 mmol m?2 s?1) between 7:00 and 13:00 h. This was accomplished by significant increases in transpiration (E) and apparent total hydraulic conductance (KT), in which averages were higher at 13:00 h. From 13:00 to 17:00 h, gs, E, and KT decreased sharply, reaching their lower values at 17:00 h. In these plants, significant increases in height (116%), stem diameter (50%) and leaf area (200%) were registered over the experimental period (20 days). Analyses of linear regression between gs or E and leaf-to-air vapor pressure deficit (?w) were not significant. In water-stressed plants, gs and E were higher at 7:00 h and lower from 9:00 to 17:00 h, while KT was higher in early morning (7:00 h) and in late afternoon (17:00 h) than between 9:00 and 15:00 h. Moreover, both gs and E decreased potentially (P < 0.001) with the diurnal increases on ?w. Drought also decreased leaf and leaflet numbers and reduced total leaf area, but had no effect on stem height and diameter. Leaf proline was higher (ca. 400%, between 13:00 and 15:00 h) in water-stressed plants, suggesting osmotic adjustment under drought. Twelve hours after resumption of irrigation, ?pd wa... Mostrar Tudo |
Palavras-Chave: |
Transpiração. |
Thesagro: |
Água; Mogno. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02506naa a2200229 a 4500 001 1658411 005 2022-11-16 008 2009 bl uuuu u00u1 u #d 024 7 $a10.1016/j.foreco.2009.06.054$2DOI 100 1 $aCORDEIRO, Y. E. M. 245 $aPhysiological and morphological responses of young mahogany (Swietenia macrophylla King) plants to drought.$h[electronic resource] 260 $c2009 520 $aYoung mahogany (Swietenia macrophylla King) plants were grown under either well-watered (pre-dawn leaf water potential, ?pd, ca. ?0.40 MPa) or drought (?pd, ca. ?3.52 MPa) conditions to examine some physiological strategies that allow the maintenance of leaf turgor. In well-watered plants, stomatal conductance (gs) was nearly constant (440 mmol m?2 s?1) between 7:00 and 13:00 h. This was accomplished by significant increases in transpiration (E) and apparent total hydraulic conductance (KT), in which averages were higher at 13:00 h. From 13:00 to 17:00 h, gs, E, and KT decreased sharply, reaching their lower values at 17:00 h. In these plants, significant increases in height (116%), stem diameter (50%) and leaf area (200%) were registered over the experimental period (20 days). Analyses of linear regression between gs or E and leaf-to-air vapor pressure deficit (?w) were not significant. In water-stressed plants, gs and E were higher at 7:00 h and lower from 9:00 to 17:00 h, while KT was higher in early morning (7:00 h) and in late afternoon (17:00 h) than between 9:00 and 15:00 h. Moreover, both gs and E decreased potentially (P < 0.001) with the diurnal increases on ?w. Drought also decreased leaf and leaflet numbers and reduced total leaf area, but had no effect on stem height and diameter. Leaf proline was higher (ca. 400%, between 13:00 and 15:00 h) in water-stressed plants, suggesting osmotic adjustment under drought. Twelve hours after resumption of irrigation, ?pd was similar (P > 0.05) between well-watered and drought-stressed plants, suggesting an ability of plants to recover turgor after stress cessation. Altogether, our data support the hypothesis that young mahogany plants have the ability to satisfactorily tolerate or postpone drought. 650 $aÁgua 650 $aMogno 653 $aTranspiração 700 1 $aPINHEIRO, H. A. 700 1 $aSANTOS FILHO, B. G. dos 700 1 $aCORREA, S. S. 700 1 $aSILVA, J. R. R. e 700 1 $aDIAS-FILHO, M. B. 773 $tForest Ecology and Management$gv. 258, n. 7, p. 1449-1455, Sep. 2009.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
03/01/2013 |
Data da última atualização: |
03/01/2013 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SOUSA, A. C. DA S. A. DE.; ALBUQUERQUE, L. B. de; BARROS, A. de. |
Afiliação: |
ALINE CRISTINA DA SILVA ALVES DE SOUSA, BOLSISTA CNPQ; LIDIAMAR BARBOSA DE ALBUQUERQUE, CPAC; ANDRE DE BARROS, CPAC. |
Título: |
Germinação de Tococa formicaria Mart. e Tibouchina stenocarpa (DC) Cogn. Melastomataceae Juss, ocorrentes em matas ripárias do bioma cerrado. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE BOTÂNICA, 63., 2012, Joinville. Botânica frente às mudanças globais: anais. [S.l.]: Sociedade botânica do Brasil, 2012. Disponível online. |
Idioma: |
Português |
Palavras-Chave: |
Área degradada; Distrito Federal. |
Thesagro: |
Cerrado; Germinação; Melastomataceae. |
Categoria do assunto: |
-- |
URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/943887/1/CRI80271.pdf
|
Marc: |
LEADER 00736nam a2200181 a 4500 001 1943887 005 2013-01-03 008 2012 bl uuuu u00u1 u #d 100 1 $aSOUSA, A. C. DA S. A. DE. 245 $aGerminação de Tococa formicaria Mart. e Tibouchina stenocarpa (DC) Cogn. Melastomataceae Juss, ocorrentes em matas ripárias do bioma cerrado. 260 $aIn: CONGRESSO NACIONAL DE BOTÂNICA, 63., 2012, Joinville. Botânica frente às mudanças globais: anais. [S.l.]: Sociedade botânica do Brasil, 2012. Disponível online.$c2012 650 $aCerrado 650 $aGerminação 650 $aMelastomataceae 653 $aÁrea degradada 653 $aDistrito Federal 700 1 $aALBUQUERQUE, L. B. de 700 1 $aBARROS, A. de
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Cerrados (CPAC) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|