Study on Leaf Traits and Adaptation Strategies of Sophora japonica at Different Ages
The variation and correlation of leaf traits can reflect the resource utilization and adaptive survival strategies of plants.In order to explore the traits and variation rules of the leaves of Sophora japonica of different ages,taking the leaves of Sophora japonica of different ages in Liaocheng city as the research object,13 indicators including the leaf area(LA),leaf fresh weight(FW),leaf dry weight(DW),leaf length(LL),leaf width(LW),petiole length(PL),leaf thickness(LT),rachis length(RL),leaf shape index(LI),specific leaf area(SLA),leaf dry matter content(LDMC),leaf tissue density(LTD),and specific leaf weight(SLW)were measured,and one-way analysis of variance and coefficient variation analysis were used to explore the characteristics of leaf traits at different tree ages.Principal component analysis and correlation analysis were used to study the adaptation rules of Sophora japonica leaves at different tree ages.The results showed that the DW,LL and PL of reserve resources were significantly higher than those of other tree ages(P＜0.01).The total coefficient variations of 13 leaf traits of Sophora japonica were from 8.57％to 81.48％;among leaf traits of different tree ages,the coefficient variation of the reserve resource LTD was the largest which was 92.86％,and the coefficient variation of the secondary ancient tree LDMC was the smallest which was 5.84％.LA,FW,DW,LL and LW were extremely significantly positively correlated with each other(P＜0.01);SLA was significantly negatively correlated with FW,DW,LTD and SLW(P＜0.01),and positively correlated with LT(P＜0.01);LDMC was significantly positively correlated with FW,DW,LTD and SLW(P＜0.01).The leaf traits of reserve resources had the characteristics of high LDMC and SLW,low SLA,and belong to the survival strategy of"quick investment-income type";the secondary ancient trees and the first grade ancient trees showed high SLA,low LDMC and SLW leaf character combinations,and adopted a"slow investment-benefit"and"conservative"strategy.Above results provided a scientific basis for the formulation of maintenance and management strategies for different age classes of Sophora japonica.
国家科技期刊平台
NSTL
万方数据
