Ontogenetic patterns of CO2 exchange of Quercus rubra L. leaves during three flushes of shoot growth. II. Insertion gradients of leaf photosynthesis

Abstract

Carbon dioxide exchange rates (CERs) of all leaves along the stem of northern red oak seedlings were determined at several stages of ontogeny. Data, based on short-term CER measurements, showed ontogenetic patterns of CO2 exchange similar to those reported for northern red oak under "steady state' laboratory conditions. -from Authors