Leaf temperature effects on measurements of diffusive resistance to water vapor transfer

Substantial errors can be introduced to estimates of leaf resistance ($\text{r}_{l}$) obtained from diffusion porometers unless precautions are taken to reduce the leaf-cup temperature difference ($\text{T}_{\text{leaf}}-\text{T}_{\text{cup}}$) to acceptable levels prior to measurement. When $\text{...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1971-04, Vol.47 (4), p.559-561
Main Authors: Morrow, P.A, Slatyer, R.O
Format: Article
Language:English
Subjects:
Calibration
porometers
Relative humidity
Sensors
Stomata
Temperature dependence
Temperature gradients
Temperature ratio
Transpiration
Vapor pressure
Water vapor
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Summary:Substantial errors can be introduced to estimates of leaf resistance ($\text{r}_{l}$) obtained from diffusion porometers unless precautions are taken to reduce the leaf-cup temperature difference ($\text{T}_{\text{leaf}}-\text{T}_{\text{cup}}$) to acceptable levels prior to measurement. When $\text{T}_{\text{leaf}}>\text{T}_{\text{cup}}$, underestimation of leaf resistance occurs; the reverse applies when $\text{T}_{\text{leaf}}
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.47.4.559