不同种源侧柏鳞叶解剖构造及其与抗旱性的关系

Anatomical Structure and Its Relation to Drought Resistance for Provenances of Platycladus orientalis

该文以侧柏的代表性种源为材料，通过扫描电镜和光学显微切片观察了鳞叶的解剖构造．结果表明：侧柏鳞叶旱化程度较高，７５％～８５％的气孔分布在鳞叶下表面，鳞叶表皮层细胞小而壁厚，排列紧密，上表皮角质层明显增厚．种源间在鳞叶下表面气孔密度、表皮厚度和孔下室深度等方面有显著差异。

With the 1 year old seedlings of representative provenances of Platycaldus orientalis (L.)Franco,the anatomical structure and the relation to drought resistance were studied.The results indicated that: P.orientalis generally is characterized by distinct structural features of xeromorphism.The numbers of stomata on lower epidermis accounted for 75%～85% of the total.The variation of stomata numbers,epidermis thickness and stomata chamber were investigated among the tested provenances;the provenances from Miyun of Beijing and Fugu of Shaanxi Province were more xerophilous.