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- Title
The Effect of Humidity on Water Uptake by, and Viscous Flow Resistance of, Excised Leaves of a Number of Species: Physiological and Anatomical Observations.
- Authors
SHERIFF, D. W.
- Abstract
Water uptake, used as an indication of transpiration, and viscous flow resistance, used as an indication of stomatal aperture, were measured for leaves or shoots of 26 species in a leaf chamber. The relative humidity of the air in the chamber was varied between approximately 15 and 90%. Stomata of 10 species showed a direct response to humidity. The humidity response was not related to the number of ectodesmata or to the arrangement of vascular tissues. Those species which showed a direct stomatal response to humidity were found to have, on average, larger substomatal cavities (measured in transverse section) than the other species. The presence or absence of the humidity response is not linked to the normal habitat of a species, but seems to be related to its phylogeny.
- Publication
Journal of Experimental Botany, 1977, Vol 28, Issue 6, p1399
- ISSN
0022-0957
- Publication type
Article