Combined allelopathic effects of Spirogyra (Zygnematales: Zygnemataceae) and Ceratophyllum demersum (Ceratophyllales: Ceratophyllaceae) on the growth of Microcystis aeruginosa (Chroocolales: Microcystaceae)
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Allelopathic inhibition activity of Spirogyra and Ceratophyllum demersum (C. demersum) on Microcystis aeruginosa were compared using a series of experiments. Culture solution of Spirogyra was found to inhibit growth of M. aeruginosa resulting in the destruction of chlorophyll-a and increased MDA content of the algae. The inhibitory effect was increased with greater concentrations of macrophyte culture solution and with continuous addition of the macrophytes. Filter size also had an effect in the inhibition of M. aeruginosa growth. Poor algal growth may have resulted from metabolic secretions from Spirogyra and associated epiphytic bacteria. Inhibition of algal growth and growth of the macrophytes and tolerance of Spirogyra to eutrophic conditions were further improved by synergistic effects of co-existing Spirogyra and C. demersum. Maximum inhibition effects and macrophyte biomass were recorded when the ratio of Spirogyra to C. demersum was 6:4.
KeywordsSpirogyra Allelopathy Coexistence Synergistic effects
Research, development and engineering application of the in situ selective induction and tolerance fish delivery was supported by Key Research and Development Project funding by the Hunan Provincial Science and Technology Department (2017SK 2302); development and application demonstration of the malodor gas on-line monitoring and control system was supported by the Hunan Provincial Environmental Protection Office, Xiangcai Jian (2017, 83); analysis of the causes of total phosphorus pollution in Dongting Lake and countermeasures for prevention and control were supported by the Hunan Provincial Environmental Protection Office. Project funding was provided by the National Key Research and Development Program of China (No. 2016YFD0800807).
The research and development and engineering application of the remediation technology of in situ selective induction and tolerance fish delivery. The key research and development project of the Hunan provincial science and Technology Department.2017SK 2302.
Development and application demonstration of malodor gas on-line monitoring and control system. Hunan provincial Environmental Protection Office, Xiangcai Jian 83.
Analysis of the causes of total phosphorus pollution in Dongting Lake and Countermeasures for prevention and control.Special funds for the prevention and control of the central water pollution,Hunan provincial Environmental Protection Office.
Compliance with ethical standards
Conflict of interest
We do not have any conflict of interest.
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