5种杨树无性系叶片解剖结构的抗旱性研究

Studies on Drought Resistance on Anatomical Structure of Leaves of 5 Poplar Clones

为探索杨树抗旱性生长的途径,对新疆现引进的斯大林杨、抗盐碱杨、抗虫杨、北美速生杨、银新杨等5个杨树无性系叶片进行石蜡切片解剖结构观测,并用模糊数学的隶属函数法对叶片上表皮厚度、栅栏组织、海绵组织、叶片组织结构紧密度、疏松度等8项叶片抗旱性指标进行抗旱性综合评价。结果表明,5种杨树的抗旱性顺序为:斯大林杨>抗虫杨>抗盐碱杨>银新杨>北美速生杨。同时,运用灰色关联分析法对5种杨树抗旱性与8项叶片指标进行相关性分析,揭示各指标的抗旱性。表明植物叶对干旱的适应都经历着不同的途径,同时在表现方式上也各不相同。

Anatomical structure of leaves of 5 poplar clones were observed to explore the ways of poplar drought resistance breeding.Applying the method of subordinate function,9 drought resistance indexes of 5 species were measured and a comprehensive evaluation on drought resistance of them was given.The results showed that the drought resistance capability decreased in order of Albaginaceae,Agelastica alni orienealis ealy,P.xiaoz huanica ‘ Zhongtian,P.alba × P.alba var.pyram idalis,Hamamelis virginiana.Applying the method of grey correlative analysis,the correlation of drought resistance and drought resistance indexes were analyzed.It indicated that the fitting to drought of plant leaves went through different approaches,also differed from one another on behaviour ways.