Related Experiment Video
Updated: Mar 6, 2026

Relating Stomatal Conductance to Leaf Functional Traits
Published on: October 12, 2015
Stomatal closure with soil water depletion not associated with changes in Bulk leaf water status
1Department of Botany and Plant Sciences, University of California, 92521, Riverside, CA, USA.
Abstract:
It has previously been reported that canopy water loss by cowpea (Vigna unguiculata) decreases with small depletions in soil water. In these studies, under field conditions, it was demonstrated that with small changes in soil water status leaf conductance of cowpea decreases in a manner which is consistent with the sensitive regulation of canopy water loss.However, treatments which differed in leaf conductance, and presumably stomatal aperture, had similar leaf water potentials. It is hypothesized that the stomatal closure which results from soil water depletion is mediated by changes in root water status through effects on the flow of information from root to shoot. An efficient mechanism of this type could be partially responsible for the extreme drought avoidance exhibited by this plant.
More Related Videos
07:03Assessing Stomatal Response to Live Bacterial Cells using Whole Leaf Imaging
Published on: October 2, 2010
12:11Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM
Published on: December 31, 2012
Related Concept Videos
Regulation of Transpiration by Stomata
Responses to Drought and Flooding
Adaptations that Reduce Water Loss
Tonicity in Plants
Tonicity in Plants
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Water and Mineral Acquisition