1. 暨南大学水生生物研究所, 热带亚热带水生态工程教育部工程研究中心, 广东省高校水体富营养化与赤潮防治重点实验室, 广州510632; 2. Environmental and Analytical Laboratories, Faculty of Science, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
Hormesis effect of organophosphorus pesticide glyphosate-isopropylammonium on Heterosigma akashiwo
ZHOU Jing-yun1, ZHANG Lei1, AN Min2, DUAN Shun-shan1
1. Institute of Hydrobiology, Jinan University, Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering Ministry of Education, Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institutes, Guangzhou, 510632, China; 2. Environmental and Analytical Laboratories, Faculty of Science, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
The growth,chlorophyll a contents,protein contents of Heterosigma akashiwo under different concentrations of glyphosate-isopropylammonium(0,0.001,0.01,0.1,1 and 10 mg·L-1)were investigated.The results showed that glyphosate-isopropylammonium caused significantly toxic effect on microalgae.The cell density,chlorophyll a contents and protein contents were decreased significantly under 10 mg·L-1 concentration(p<0.05).Low dose of glyphosate-isopropylammonium had significantly stimulated effect on microalgae.The growth and chlorophyll a contents of H.akashiwo were significantly increased as compared to the control group under low concentrations(<1 mg·L-1)at 72 h(p<0.05).At latter period of the experiment(7th,9th,11th day),the stimulated effect gradually disappeared,with no significant difference in physiological characteristics between treatments and the control group.
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