Effect of errors in measuring leaf temperature and ambient gas concentration on calculated resistances to CO/sub 2/ and water vapor exchanges in plant leaves
Journal Article
·
· Plant Physiol.; (United States)
OSTI ID:5755040
Errors as small as 1/sup 0/C in the measurement of leaf temperature (T/sub leaf/) are shown to cause significant changes in the estimated value of the stomatal resistance (expressed in terms of total resistance to water vapor transfer, ..sigma..r/sub H/sub 2/O/). The effect increases as T/sub leaf/ increases and as ambient relative humidity increases, if other conditions are maintained constant. The effect on the key CO/sub 2/ exchange parameter, the intracellular (or mesophyll) resistance tends to be small under open stomata but increases rapidly as stomatal closure occurs, particularly if the true value is relatively small. 11 references, 4 figures.
- Research Organization:
- Australian National Univ., Canberra
- OSTI ID:
- 5755040
- Journal Information:
- Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 4; ISSN PLPHA
- Country of Publication:
- United States
- Language:
- English
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