大气SO_2-Pb复合污染胁迫下毛白杨抗逆相关性分析  

Correlation analysis of resistance of Populus tomentosa under stress of atmospheric SO_2-Pb compound pollution

作　　者：鲁敏[1,2] 贺中翼 李科科[2] 郭天佑[2] 高鹏[2] 

机构地区：[1]山东建筑大学学报编辑部 [2]山东建筑大学艺术学院,山东济南250101

出　　处：《山东建筑大学学报》2016年第5期409-415,共7页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金重点项目(20337010);住房和城乡建设部科技计划项目(2011-K6-30);山东省住房和城乡建设厅科技项目(2011YK023)

摘　　要：大气SO_2-Pb复合污染严重危害生态系统的稳定性和人类的生存发展。植物对大气SO_2-Pb复合污染具有一定抗性,揭示其抗性机制,对大气污染的植物生态修复具有重要意义。研究通过对现场采样的毛白杨叶片相关生理生化指标变化进行抗逆相关性分析,探索毛白杨对大气SO_2-Pb复合污染的抗性机制。结果表明:大气SO_2-Pb复合污染胁迫条件下,毛白杨叶片中MDA含量与可溶性糖含量、POD活性与APX活性、POD活性与超氧阴离子产生速率、可溶性蛋白含量与超氧阴离子产生速率显著相关,其余指标两两之间相关性均不显著;其中,MDA含量与可溶性糖含量、POD活性与APX活性呈显著负相关(P<0.05),超氧阴离子产生速率与POD活性及可溶性蛋白含量呈显著正相关(P<0.05)。说明毛白杨受到大气SO_2-Pb复合污染胁迫后,体内部分保护酶活性增强,其对于其抗逆性机制和解毒作用起到关键作用。Atmospheric SO2-Pb compound pollution has detrimental effect on the stability of ecosystems and the survival and development of human beings, Plants have a certain resistance to atmospheric SO2-Pb compound pollution. Revealing the mechanism of plant resistance mechanisms plays a significant role in the use of plants to atmospheric pollution ecological restoration. By sampling the Populus tomentosa in areas, the paper makes correlation analysis of changes in their resistance physiological indices in leaves and explorse the resistance mechanism of Populus tomentosa against SO2-Pb compound pollution. The results show that under atmospheric SO2-Pb compound pollution stress, in/eaves of Populus tomentosa, the content of MDA and soluble sugar, POD activity and POD activity, POD activity and the rate of O2 - generation, the content of soluble protein and the rate of O2- generation were significantly related, and no significant correlation exists between the other indicators. Furthermore, the content of MDA and soluble sugar, POD activity and APX activity were negatively correlated （ P 〈 0.05 ）, POD activity and the rate of O2 - generation, the content of soluble protein and the rate of O2- generation were positively correlated （ P 〈 0.05 ）. It shows that some of the protective enzyme in the body of Populus tomentosa become more active under stress of atmospheric SO2-Pb compound pollution, which plays a key role in resistance mechanisms and detoxification.

关 键 词：大气复合污染 铅 二氧化硫 胁迫 抗逆性 

分 类 号：X171.4[环境科学与工程—环境科学] X173