生态环境学报Issue(4)：554-560,7.DOI:10.16258/j.cnki.1674-5906.2015.04.002
不同暴露方式下水生植物化感物质抑藻效应的比较研究
Comparative Study on Antialgal Effects of Allelochemicals from Aquatic Plants under Different Exposure Protocols
摘要
Abstract
To explore the effective pathway of how the allelochemicals released by aquatic plants work at ecological levels, three typical allelochemicals including nonanoic acid, N-phenyl-1-naphthylamine and caffeic acid, from different chemical classes, were selected to compare their inhibition effects at high-dose single exposure and low-dose repeated exposure on the growth of Microcystis aeruginosa. The influences of exposure frequency, dose and light conditions on the repeated exposure effect were examined. Stronger inhibition on cyanobacterial growth was observed in the low-dose (0.5 mg·L-1) repeated exposure (five times at 2 h interval) group than that in the high-dose (2.5 mg·L-1) single exposure group. The inhibition ratio of nonanoic acid, N-phenyl-1-naphthylamine and caffeic acid in the former group was 1.8, 1.1 and 1.6 times that of the latter group on the 7th day. When nonanoic acid and N-phenyl-1-naphthylamine were repeatedly exposed 10 times at 1h interval, the cyanobacterial growth inhibition ratio decreased with the reduction of single dose. However, the growth ofM.aeruginosa was significantly inhibited by the two allelochemicals when the single dose was as low as 0.1 mg·L-1, with an inhibition ratio up to 50.25% by N-phenyl-1-naphthylamine on the 7th day. The inhibition effects of nonanoic acid and N-phenyl-1-naphthylamine when repeatedly added under dark phase were stronger than that under light phase, the cyanobacterial growth inhibition ratio of the former group was 2.2 and 1.3 times that of the latter group on the 3rd day. All above results indicated that the allelochemicals released by aquatic plants could exert more effective inhibition on the growth ofM.aeruginosa by low-dose repeated exposure than high-dose single exposure. Hence, further study on the antialgal effects of plant allelochemicals through repeated exposure would be helpful for revealing allelopathy mechanism of aquatic plants in natural environments, and guiding their theoretical research and practical application.关键词
壬酸/N-苯基-1-萘胺/咖啡酸/多次暴露/铜绿微囊藻Key words
nonanoic acid/N-phenyl-1-naphthylamine/caffeic acid/repeated exposure/Microcystis aeruginosa分类
资源环境引用本文复制引用
高云霓,葛芳杰,刘碧云,鲁志营,何燕,张甬元,吴振斌..不同暴露方式下水生植物化感物质抑藻效应的比较研究[J].生态环境学报,2015,(4):554-560,7.基金项目
国家“十二五”水专项（2012ZX07101007-005）；国家“十二五”科技支撑项目（2012BAJ21B03）；淡水生态与生物技术国家重点实验室开放课题（2013FB20）；淡水生态与生物技术重点实验室开放课题（2015FB02）；河南师范大学博士启动课题 （）
