Gas Exchange in Plant Leaves Having Different Transfer Resistances Through Their Two Surfaces

Abstract

An existing model for the internal pathways of gas· exchange in anisolateral leaves is extended so as to include the feedback effects that different gas-exchange rates through the two surfaces of a leaf can have on the concentration differences driving the exchange. This "concentration effect" is analysed in detail, and graphs are presented which can be used to estimate the magnitude of error in estimates of the intracellular resistance to CO2 uptake obtained from total leaf gas-exchange data.