Ehrler, W.L. and Bavel, C.H.M. van (1968) Leaf diffusion resistance, illuminance, and transpiration. Plant Physiology, 43. pp. 208-214.
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Abstract
Stepwise increases in fluorescent illuminance, imposed as a single variable in a controlled environment, induced progressive stomatal opening in 8 plant species, as evidenced by a oonsistent decrease in leaf diffusion resistance (RL), ranging from 15 to 70 sec cm-l in darkness to about 1 sec cm-1 at approximately 40 kilolux. The minimum R1. values were the same for the upper and the lower epidermis, provided that stomatal density was adequate. Saturation illuminance was not achieved in any species; extrapolation indicates that 50 kilolux would bring about full stomatal opening (RL < 0.1 sec cm-1). In 4 species, reasonable agreement was obtained in a controlled environment between transpiration as measured by weight loss and that calculated from determination of (a) the difference in water vapor density from leaf to air, (b) the boundary layer resistance, and (c) the leaf diffusion resistance. This result confirms the physical validity of the resistance measurement procedure
| Item Type: | Article |
|---|---|
| Author Affiliation: | Soil and Water Conservation Research Division, ARS, United States Department of Agriculture, United States Water Conservation Laboratory, Phoenix, Arizona 85040 |
| Subjects: | Crop Improvement > Biotechnology |
| Divisions: | General |
| Depositing User: | David T |
| Date Deposited: | 25 Jul 2011 09:04 |
| Last Modified: | 25 Jul 2011 09:04 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2468 |
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