Does microcystin disrupt the induced effect of Daphnia kairomone on colony formation in Scenedesmus? |
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| Institution: | 1. College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China;2. College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, PR China;3. College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, PR China;4. Quebec-Ocean and Takuvik Joint International Research Unit, Université Laval, Québec, Canada;5. Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310032, PR China;6. State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, PR China;1. Department of Cardiology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China;2. Department of Cardiology, the First People''s Hospital of Shunde, Foshan, 528300, China;3. Clinical Medicine Research Center, the First People''s Hospital of Shunde Foshan, 528300, China |
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| Abstract: | In natural aquatic system, Scenedesmus and Microcystis species usually coexist. Microcystins are released into water after lysis of Microcystis cells during the collapse of heavy blooms. The released toxins can then come into contact with a wide range of aquatic organisms. In this study, we used filtered Daphnia test water containing kairomone from Daphnia magna to stimulate the inducible colony formation in Scenedesmus obliquus under microcystin-contaminated system, to examine how microcystin affects the induced effect of Daphnia kairomone on colony formation in S. obliquus. The results showed neither microcystin nor Daphnia kairomone affected the growth of S. obliquus. Microcystin neither promoted nor impaired the overall Daphnia-induced colony formation in S. obliquus, except reducing the proportion of eight-celled colonies on day 2, indicating that the effect of microcystin was just short-term and in general did not disrupt grazer-induced colony formation of S. obliquus. |
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| Keywords: | Colony formation Inducible defenses Microcystin |
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