[Objective] The aim was to explore, leaf structure characters of Malus rockii and Malus robusta at drought and rewatedng. [Method] The research used Malus rockii and Malus robusta as test materials to conduct water stress treatment by water control and rewatering. [Result] Malus rockii consists of two layers of pal- isade tissue and Malus robusta consist of three layers of columnar cells. Leaf of Malus robusta is thicker, and the thickness of leaf palisade tissue-to-the thickness of spongy tissue ratio is higher. In contrast, leaf stoma of Malus rockii performs more sensitively to water change, and the stoma area after rewatering is 10 times as high as Malus robusta. Besides, after rewatering, SR grows higher, the thickness of leaf palisade tissue-to-the thickness of spongy tissue ratio declines of the two test materials, but the changes of Malus robusta prove more significant. [Conclusion] The two test materials are different in responses to drought and rewatering, and the leaf structure characters of Malus robusta changes obviously than that of Malus rockii during water variation in terms of resisting drought.
