Population variation of leaf anatomical structure of Quercus variabilis and its adaptation to environmental factors
[Objective]The study aims to understand the population variation of leaf anatomical structure of Quercus variabilis and its relationship with environmental factors.[Methods]The leaves of 28 naturally distributed Q.variabilis populations in China were studied by conventional paraffin sections combined with optical microscopy.Nested analysis of variance and Pearson correlation analysis were performed to analyze the relationship between population variation of leaf anatomical structure and environmental fac-tors.[Results](1)There were significant difference in the anatomic traits of Q.variabilis leaves among 28 populations,and the average coefficient of variation was 7.84％-15.16％,while the variation range of the same leaf anatomic trait varied among different populations.(2)There were significant difference among the 9 anatomic traits within and among the populations,and the average phenotypic differentiation coefficient was 37.44％.The variation of anatomic traits mainly came from within the populations.(3)Leaf thickness,upper epidermal cell thickness,palisade tissue thickness,and spongy tissue thickness were significantly positively correlated with latitude,and mean annual temperature and annual precipitation had significant effects on the upper epidermal cell thickness and palisade tissue thickness.[Conclusion]The re-sults show that Q.variabilis has rich genetic diversity.To adapt to low temperature and drought,Q.variabilis leaves show a trend of thickening.The results provide a theoretical basis for understanding envi-ronmental adaptation strategies of Q.variabilis.
万方数据
维普
