不同海拔密花香薷叶表特征比较

Comparison of the Leaf Eplidermal Characters' in Different Altitude of Elsholtzia densa

以不同海拔密花香薷叶为试材,采用过氧化氢-醋酸离析法对不同海拔密花香薷叶片进行叶表切片制片,在光学显微镜下对表皮细胞形态、气孔特征进行了观察比较。结果表明:密花香薷表皮细胞形状随海拔上升差异很小;气孔随海拔上升由长椭圆型向近圆形转变,气孔器全部散生分布,气孔取向无规则,下表皮气孔密度大于上表皮。气孔大小、气孔密度、气孔指数随海拔升高呈现一定的规律性变化,说明植物的叶表特征与其所处的环境相互依存。

Taking leaves of Elsholtzia densa as test material,observing and comparing the leaf epidermal characters comparison in different altitude with segregation process.The results showed that Elsholtziadensaepidermal cell shape with the rise in elevation difference was very small;the porosity increased with the increase of the altitude from the long oval to the near circle,all the distribution of stomatal apparatus,the density of stomata in the lower epidermis was more than that of the upper epidermis.The stomatal size,stomatal density and stomatal index also increased with the elevation on a change,this was a plant with its surroundings mutual adaptation results.