四川大学学报（自然科学版）2025，Vol.62Issue(2)：279-286,8.DOI:10.19907/j.0490-6756.250030
青杨雌雄幼苗叶片功能性状的季节变化特征
Seasonal variation of leaf functional traits in male and female Populus cathayana seedlings
摘要
Abstract
This study aimed to revealed the seasonal variation of leaf functional traits of male and female Populus cathayana seedlings,the changes of leaf dry matter content,leaf water content,carbon isotope,leaf total carbon,leaf total nitrogen,carbon to nitrogen ratio,total phenol and condensed tannin in spring,sum-mer and autumn of male and female Populus cathayana seedlings were determined by the methods of variabil-ity analysis,difference testing and correlation analysis and principal component analysis.The results showed:1)The degree of variation in indexes of Populus cathayana seedlings differed among seasons.The degree of variation was highest in spring,second highest in autumn and lowest in summer.2)Leaf water,carbon,ni-trogen,and total phenol contents were high in spring,which was conducive to the growth of plants;and the dry matter and condensed tannin contents of leaves were significantly increased in autumn.3)Seasonal varia-tions in the functional traits of leaves were sexually different.Male plants were more efficient in water use in spring,accumulated more total phenol content in summer and accumulated more dry matter in autumn,while female plants had higher leaf water content in autumn.Overall,males had better stress tolerance and females had stronger water retention capacity.4)Male and female Populus cathayana seedlings had different combi-nations and correlations of functional traits in different seasons.Principal component analysis showed that car-bon content and nitrogen content could be used as the main indexes for leaf functional traits evaluation of male and female Populus cathayana,respectively.These results indicated that there were significant differences in resource acquisition and utilization strategies between male and female Populus cathayana seedlings in differ-ent seasons,which showed different adaptability to the environment.关键词
青杨/雌雄异株/叶片/功能性状/季节变化Key words
Populus cathayana/Dioecism/Leaf/Functional traits/Seasonal variation分类
生物学引用本文复制引用
杨心怡,宋思宇,高文童,胥晓..青杨雌雄幼苗叶片功能性状的季节变化特征[J].四川大学学报（自然科学版）,2025,62(2):279-286,8.基金项目
国家自然科学基金(32370287) （32370287）
