Comparison of the gas exchange parameters of two maple species (Acer negundo and Acer pseudoplatanus) seedlings under drought stress

In this study, two-year-old bare-root Acer negundo and pseudoplatanus seedlings were grown indoors (control vs. drought-stressed) outside the hoop house to examine leaf gas exchange parameters in late growing period. Besides morphological features, several parameters, such as net photosynthetic rate (Anet), transpiration (E), stomatal conductance (gs), intercellular CO2 ambient (Ci/Ca), water use efficiency (WUE=Anet/E), intrinsic (iWUE=Anet/gs) measured. As a result, A. had higher stem height growth. Anet, lower iWUE Ci/Ca than pseudoplatanus. Seedlings under control treatment gs, E, iWUE, WUE, values other treatments. conclusion, there was no significant difference between two species terms of parameters. However, it can be said that are drought resistant.