Effect of propionamide on the growth of Microcystis flos-aquae colonies and the underlying physiological mechanisms

The Science of the Total Environment
Xiang WuJinyun Ye

Abstract

Reducing the formation and growth of Microcystis colonies is an important prerequisite for the effective prevention and treatment of cyanobacterial blooms. Microcystis flos-aquae colonies was selected to investigate the potential of propionamide for use in controlling cyanobacterial blooms. Propionamide, one of the major allelochemicals in the root exudates of E. crassipes, was tested using different concentrations (0, 0.2, 1, and 2mgL-1) and dosing methods (one-time addition, semi-continuous addition, and continuous addition) to assess its effect on the growth of M. flos-aquae colonies. The results showed that in the presence of different concentrations of propionamide, the growth of M. flos-aquae colonies followed a logistic growth model, with a higher degree of fit at lower propionamide concentrations. With the semi-continuous addition of 2mgL-1 propionamide, the growth of M. flos-aquae colonies was markedly inhibited; the relative inhibition ratio of algal cells reached >90% at day 7 of co-culture, and the colonial form gradually disintegrated, transforming mainly into unicellular and bicellular forms and small colonies (average diameter<50μm). Following the semi-continuous addition of 2mgL-1 propionamide, the exopolysaccha...Continue Reading

Citations

Sep 6, 2019·International Journal of Environmental Research and Public Health·Jingyi ZhuDong Sun
Mar 20, 2021·The Science of the Total Environment·Giridhar Babu AnamYoung-Ho Ahn
Apr 17, 2021·Environmental Science and Pollution Research International·Lixiao NiXuqing Chen
Jun 12, 2021·Environmental Science and Pollution Research International·Yi-Dong ChenRu-Nan Tian
Jul 19, 2021·Journal of Environmental Management·Zeshuang WangZhou Yang
Jul 28, 2021·Environmental Science and Pollution Research International·Jie WangBo Li
Jan 12, 2020·The Science of the Total Environment·Xuan WangXiaohui Jiang

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