Effect of Soil Pb Pollution on Physiological-biochemical Characteristics of Young Tilia amurensis Rupr.
Three-year old Tilia amerensis Rupr. was taken as study subject in a pot experiment. Chlorophyll content, REC, peroxidase activity, SOD activity, and other indices of Tilia amerensis Rupr. leaves were assayed. The experimental results show that Pb contaminated and destroyed the chloroplast structure of Tilia amerensis Rupr. leaves and impeded the synthesis of chlorophyll in the leaves. When Pb concentration was 10 mgkg-1-100 mg·kg-1, REC of the Tilia extract was roughly equal to that of the control group, and Tilia amerensis Rupr. leaves were contaminated by Pb to a small degree. When Pb concentration reached a higher level, REC increased rapidly and Tilia amerensis Rupr. leaves were contaminated substantially. Low Pb concentration may lower the POD activity of the leaves. However, when Pb concentration was high, the POD activity elevated and Tilia amerensis Rupr. could exhibit various reactions to instinctively defend itself. The SOD activity of the Pbcontaminated Tilia amerensis Rupr. was slightly higher than that of the control group, and the ROS content remained low. The SOD enzyme system was undamaged.
Xu Wenyuan Mu Liqiang Sun Long Wang Zhixin
School of Forestry, Northeast Forestry University, Harbin 150040, China
国际会议
哈尔滨
英文
1395-1399
2011-03-26（万方平台首次上网日期，不代表论文的发表时间）