Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 232, Issue -, Pages 382-386Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2018.11.105
Keywords
Cell proliferation; Juglone; Microcystis aeruginosa; Microcystins; Photosynthesis
Categories
Funding
- National Natural Science Foundation of China [31500373]
- Natural Science Youth Foundation of Jiangsu Province [BK20150927]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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The elimination of cyanobacteria blooms has become an urgent concern in aquatic environmental protection. Allelopathic control is considered a potential approach because of its exclusive and ecological safety properties. The present study evaluated the allelopathic effect of juglone, a derivative from the genus Juglans, on the toxic Microcystis aeruginosa. Juglone at 3.0-9.0 mg L-1 notably depressed the cell proliferation of M. aeruginosa. The cell abundance treated by 9.0 mg L-1 juglone decreased by 75% after an 11-day exposure. The antioxidant enzyme activity (SOD and CAT) in juglone groups increased remarkably, suggesting juglone-induced oxidant stress in the M. aeruginosa cells. Juglone exposure enhanced the intracellular and extracellular microcystin contents per cell. Nonetheless, the total amount of microcystins in the juglone-treated cyanobacterial system did not increase because of the decreased cell abundance. These results indicated the application potential of juglone for M. aeruginosa extermination.
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