Effect of Errors in Measuring Leaf Temperature and Ambient Gas Concentration on Calculated Resistances to CO2 and Water Vapor Exchanges in Plant Leaves
AUTOR(ES)
Slatyer, R. O.
RESUMO
Errors as small as 1 C in the measurement of leaf temperature (Tleaf) are shown to cause significant changes in the estimated value of the stomatal resistance (expressed in terms of total resistance to water vapor transfer, ∑rH2O). The effect increases as Tleaf increases and as ambient relative humidity increases, if other conditions are maintained constant. The effect on the key CO2 exchange parameter, the intracellular (or mesophyll) resistance, rint, tends to be small under open stomata conditions but increases rapidly as stomatal closure occurs, particularly if the true value of rint is relatively small.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=365853Documentos Relacionados
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