With the ocvation increasing,the stomataldensity on adaxial and abaxial surface of the leayes,the protruding degree of the stomatal appara-tus,the substomatic chamber and the stomatal aperture are increased.

• 结果表明：随海拔升高，植株叶片上气孔分布区域增大，叶两面气孔数量增加，气孔向外突起程度增加，孔下室及气孔张度增大。