基于多元统计评价毛白杨无性系的抗旱性

采用主成分分析等多元统计方法,通过对有关叶片形态结构和水分生理的13项指标及其相互联系的分析,综合地得出了30个毛白杨无性系的抗旱性强弱顺序.结果表明,无性系25、7、30、98、72、85号抗旱性较强.评价的主要指标有10项,可以不包括蒸腾效率、气孔密度和表皮层厚.形态结构和生理功能指标相结合进行抗旱性评价是必要的,在观察形态结构的同时,更应重视生理功能的测定.

Evaluation on Drought Resistance of Populus tomentosa Clones by Multivariate Statistics

Using such multivariate statistiscal methods as principal component analysis and canonical correlation analysis, drought resistant order of 30 Chinese white poplar clones was comprehensively presented by analyzing 13 indices of leaf morphology, anatomy and water physiology as well as correlations among them. It was showed that No. 25, No. 7, No. 30, No. 98, No. 72, No. 85 of 30 clones would be with high drought resistance . 10 main indices for evaluation were gotten except transpiration efficiency, stomatal density and epidermal thickness. Combining indices for leaf morphology and anatomy with those for water physiology to evaluate drought resistance would be necessary. Accompanied by observation of morphological and anatomical characteristics, determination of physiological functions should be even valuable. Relation between drought resistance of plants and growth was also discussed.