贡嘎山不同海拔峨眉冷杉叶片生态解剖结构特性研究

An Eco-anatomical Study on Abies fabri Leaves at Gradient Elevation in Gongga Mountain

对四川省贡嘎山东坡2800、3000、3200、3500、3800 m不同海拔梯度下的峨眉冷杉叶片进行解剖,比较其结构特征,探究不同海拔高度下峨眉冷杉叶片的生态适应情况。结果表明:当海拔3000 m附近,植物叶片总厚度与叶肉结构中栅栏组织、海绵组织的厚度均达到最大值,叶片表皮各组织结构变化趋势不一致,但相关性分析结果显示,叶片上表皮、下表皮及角质层的厚度3项解剖结构两两之间均存在显著或极显著的正相关关系。在不同的海拔梯度下环境极其复杂,由此会导致峨眉冷杉叶片的结构差异性,这种差异性说明了植物在一定程度上对环境的适应。

To study the ecological adaptation of Abies fabri leaves at different altitudes(2800,3000,3200 m,3500 m and 3800 m)on the east slope of Gongga Mountain,Sichuan Province,the leaf anatomical characteristics of A.fabri were investigated.The results showed that at the altitude 3000 m,the total thickness of leaf,spongy mesophyll thickness and the thickness of palisade reached the maximum.The changes of epidermis structure were not consistent.However,the correlation analysis showed that there was a significant correlation between the thickness of upper epidermis,lower epidermis and cuticle.The environmental conditions are complex along with different altitudes,which resulted in the differences of the leaf anatomical characteristics of A.fabri.These differences of the plant could lead to a good adaptation to the environment changes in certain degree.