Mechanism of growth inhibition effect of aquatic plants on water cyanobacteria

Lei Cheng, Xiujuan Cao, Xinchen Yu

Abstract


Environmental pollution caused by industrial and agricultural production has recently become a serious problem. One of the most significant ones is the phenomenon of cyanobacteria bloom caused by eutrophication of water body. Cyanobacterial bloom not only pollutes the water, but also secretes microcystins, endanger the health of animals and humans, as well as carcinogenic effects. In the research field of ecological management of cyanobacteria, it has opened a great concern on allelopathy. In this paper, the total phenolic and tannin contents in four common aquatic plants such as lotus were determined, and their different algae inhibition effects were compared. The mechanism of algae suppression was analyzed, and suppression ability of the difference of algae was analyzed, these provided evidence for scientific control of cyanobacteria. The results showed that the correlation coefficient between the total phenol and the growth of the cyanobacteria was 0.81122, and the phenolic substance was the effective anti-algae. Among them, total phenol content in Iris is the highest and the most effective in algae suppression.

Keywords


aquatic plants; cyanobacteria; allelopathy; inhibition mechanism

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