1994 Volume 20 Issue 3 Pages 150-157
The internal water status was disturbed in Prunus×yedoensis, Quercus serrata and Populus alba, since water uptake was reduced by flooding. In P.×yedoensis, all leaves fell in two weeks of continuous flooding because of the serious water deficit. In Q. serrata, internal water deficit caused the much decrease of stomatal and mesophyll conductance, thereby, resulted in the decline of growth rate. However, the seedlings of Q. serrata survived flooding condition through the development of internal drought tolerance by way of osmotic adjustment. In the early flooding stage, P.alba reduced the stomatal conductance and photosynthetic rate due to internal water deficit, however, in the late stage, water uptake was almost recovered. The morphological acclimation such as the formation of adventitious root, leaf thickening and developent of small leaves were prominent, and the stomatal conductance and photosynthesis were recovered, therefore, the decrease of weight was less for P.alba. In Salix chaenomeloides, water uptake was not reduced, hence, the growth and its allocation were not affected by flooding stress.
