Temperature and humidity effects on branchlet gas-exchange in white spruce: an explanation for the increase in transpiration with branchlet temperature

In situ gas-exchange data, for branchlets of white spruce [Picea glauca (Moench) Voss.] in a mature mixed-wood boreal forest in central Canada (53°44´N 105°14´W), were subjected to a multiple regression analysis. Vapor pressure deficit (VPD) and branchlet temperature (t^sub leaf^) were both signific...

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Bibliographic Details
Published in:Trees (Berlin, West) West), 1999, Vol.14 (3), p.161-168
Main Authors: Fredeen, A.L, Sage, R.F
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
air temperature
Atmospheric humidity
Atmospheric temperature
Biological and medical sciences
Boreal forests
branches
Carbon dioxide
conifer needles
Darcys law
Economic plant physiology
field experimentation
Fundamental and applied biological sciences. Psychology
gas exchange
Humidity
Leaves
light intensity
Mathematical models
Mechanical permeability
Metabolism
Photosynthesis
Photosynthesis, respiration. Anabolism, catabolism
Picea glauca
Plant physiology and development
Plant tissues
Plants (botany)
relative humidity
Seedlings
Stomatal conductance
Studies
Temperature
Transpiration
Vapor pressure
viscosity
Viscosity of liquids
Water
Water relations, transpiration, stomata
Water supply
Water vapor
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Summary:In situ gas-exchange data, for branchlets of white spruce [Picea glauca (Moench) Voss.] in a mature mixed-wood boreal forest in central Canada (53°44´N 105°14´W), were subjected to a multiple regression analysis. Vapor pressure deficit (VPD) and branchlet temperature (t^sub leaf^) were both significant predictors (P
ISSN:0931-1890
1432-2285
DOI:10.1007/s004680050220