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Updated: Jun 15, 2026

Relating Stomatal Conductance to Leaf Functional Traits
Published on: October 12, 2015
Relationship between 18O enrichment in leaf biomass and stomatal conductance
Madavalam Sreeman Sheshshayee1, Hanumantha Rao Bindumadhava, Rengaswamy Ramesh
1Department of Crop Physiology, University of Agricultural Sciences, Bangalore, India. msheshshayee@hotmail.com
Abstract:
Models that explain the oxygen isotope enrichment in leaf water (and biomass) treat the relationship between the kinetic fractionation that occurs during evapotranspiration and the stomatal conductance in an empirical way. Consequently, the isotopic enrichment is always predicted to decrease with increasing stomatal conductance, regardless of the experimental evidence to the contrary. We explain why and suggest an alternative method to reconcile theory and experiment. We support this with our experimental data on rice and groundnut plants.
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