藏东南色季拉山不同海拔川滇高山栎叶解剖结构及环境适应性  

Anatomical Characteristics and Environmental Adaptability of Quercus aquifolioides Leaf in Sejila Mountain,Southeastern Tibet

作　　者：郭文文[1,2,3] 卓么草 何竹 任毅华[1,2,3] 屈兴乐[1,2,3] 方江平 Guo Wenwen;Zhuo Mecao;He Zhu;Ren Yihua;Qu Xingle;Fang Jiangping(Tibet Agricultural and Animal Husbandry University,Nyingchi Tibet 860000,China;National Key Station for Field Scientific Observation&Experiment,Nyingchi Tibet 860000,China;Key Laboratory of Forest Ecology in Tibet,Ministry of Education,Nyingchi Tibet 860000,China;People's Government of Pai Town,Nyingchi Tibet 860000,China)

机构地区：[1]西藏农牧学院,西藏林芝860000 [2]西藏林芝高山森林生态系统国家野外科学观测研究站,西藏林芝860000 [3]西藏高原森林生态教育部重点实验室,西藏林芝860000 [4]米林县派镇人民政府,西藏林芝860000

出　　处：《西南林业大学学报（自然科学）》2022年第2期33-38,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：西藏自治区自然科学基金项目(XZ2018ZRG−17)资助。

摘　　要：为探索藏东南色季拉山川滇高山栎叶片解剖结构在海拔梯度上的变化趋势和环境适应性,以藏东南色季拉山11个不同海拔梯度的川滇高山栎叶片为试验材料,采用石蜡切片技术探究川滇高山栎叶片对高寒环境的适应性。结果表明:川滇高山栎叶片为异面叶,上表皮有明显的角质层,下表皮有表皮毛,栅栏组织细胞2~3层;随着海拔的升高,叶片上下表皮厚度、栅栏组织厚度、海绵组织厚度、叶片厚度呈现增大趋势,而组织结构紧密度、主脉突起度和组织结构疏松度呈现下降趋势;可塑性指数分析表明,川滇高山栎在解剖结构上表现出较小的可塑性,对外界环境的适应能力较弱;相关性分析结果表明,除海绵组织厚度与栅栏组织厚度、组织结构疏松度与组织结构紧密度之间差异不显著以外,其余各指标之间均呈显著相关性。This article is to understand the changes in leaf anatomy of Quercus aquifolioides in Sejila Mountain,Southeastern Tibet,and their environmental adaptability under different altitude gradients.Paraffin section method are used to determine anatomical features of leaves of Q.aquifolioides collected from 11 altitudinal gradients.The results showed that leaves of Q.aquifolioides are heterohedral,the upper epidermis has obvious cuticle,the lower epidermis has epidermis,and the palisade tissue cells have 2–3 layers;with the increase of altitude,the thickness of leaf,upper epidermis,lower epidermis,palisade tissue and spongy tissue increased,but tightness of leaf palisade tissue,looseness of leaf spongy tissue,midrib protrusion vein decreased;plasticity index analysis showed that Q.aquifolioides had lower plasticity in leaf anatomy,representing weak adaptability to the environment;correlation analysis of Q.aquifolioides showed that there was no significant difference between the thickness of palisade tissue and thickness of spongy tissue,between the looseness of leaf spongy tissue and tightness of leaf palisade tissue,but there was significant correlation between the other indexes.

关 键 词：色季拉山 川滇高山栎 解剖结构 环境适应性 

分 类 号：S718.5[农业科学—林学]