The leaf stomatal length, width, area and density in Quercus liaotungensis Koidz., Ostryopsis davidiana Decne. and Ziziphus jujuba Mill. var. spinosa (Bunge) Hu ex H. F. Chow were measured with a Motic Digital Imaging Microscope and the changes in stomatal characters over last 70 years from 1930s to 2002 were analyzed. The results showed that the affects of climate changes on stomatal characters of three species were different. The leaf stomatal length, width, area and density in Q. liaotungensis all increa...
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