stomatal resistance plant_trait_ontology STORS (related) TO:0000523 This allows scientists to learn how stomata respond to changes in environmental conditions, such as light intensity, humidity, or carbon dioxide concentration. Stomatal resistance (or its inverse, stomatal conductance) can therefore be calculated from the transpiration rate and humidity gradient. (The humidity gradient is the humidity inside the leaf, determined from leaf temperature based on the assumption that the leaf's air spaces are saturated with vapor, minus the humidity of the ambient air, which is measured directly). stomatal process related trait