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Please use this identifier to cite or link to this item: http://hdl.handle.net/10451/4430

Título: Water relations of cork-oak (Quercus suber L.) under natural conditions
Autor: Oliveira, G.
Correia, O. A
Martins-Loução, M. A.
Catarino, F. M.
Palavras-chave: Mediterranean climate
Montado
Quercus suber
Soil-to-leaf hydraulic conductivity
Stomatal
Transpiration
Issue Date: 1992
Editora: Springer-Verlag
Citação: Vegetatio 99-100: 199-208, 1992.
Resumo: Daily and annual courses of leaf transpiration, stomatal conductance and shoot water potential of four Quercus suber individuals were compared in a semi-natural stand in southwest Portugal, from spring 1989 to early summer 1990. The trees investigated showed annual patterns typical of evergreen sclerophyllous species but varied in their range of stomatal operation. This appeared to be related to differences in hydraulic conductivity in the root-to-leaf pathway. Maximum stomatal conductance and transpiration rates occurred from March to June. Water stress was found to be moderate and winter cold stress due to low air and soil temperatures appeared to have an influence on plant water balance through their effects on flow resistances. Abbreviations." gsw stomatal conductance; gmax maximum stomatal conductance, PAR, photosynthetically active radiation; RH, relative humidity of the air; T, leaf transpiration; Ta, air temperature; TL, leaf temperature; Tmax maximum leaf transpiration; ∆W, air-to-leaf vapor pressure difference; W, shoot water potential; ψPD, predawn shoot water potential; ψMIN, minimum shoot water potential.
Descrição: ACESSO via B-on: http://dx.doi.org/doi:10.1007/BF00118226
Arbitragem científica: yes
URI: http://dx.doi.org/doi:10.1007/BF00118226
http://hdl.handle.net/10451/4430
ISSN: 0042-3106
Appears in Collections:FC - Artigos em Revistas Internacionais

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