Fig. 1
Net photosynthesis (Pn, a), stomatal conductance (gs, b) and transpiration rates (Tr, c) in well-aerated trembling aspen (P. tremuloides) plants (A), well-aerated plants treated with ethylene (AE), plants exposed to hypoxia (H) and subjected to hypoxia and ethylene treatment (HE) for one week. Means ± SE (n = 6) are shown. Different letters indicate significant difference (P ≤ 0.05)