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Physiological Responses of Microcystis aeruginosa to Extracellular Degradative Enzymes and Algicidal Substance from Heterotrophic Bacteria

文献类型： 外文期刊

作者： Zhou, Qing 1 ; Zhang, Yingying 1 ; Han, Shiqun 1 ; Wang, Yan 1 ; Qin, Hongjie 1 ; Zhang, Zhiyong 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

2.Minist Agr & Rural Affairs Peoples Republ China, Key Lab Agroenvironm Downstream Yangze Plain, Nanjing 210014, Peoples R China

3.Jiangsu Univ, Zhenjiang 212013, Jiangsu, Peoples R China

关键词： Microcystis aeruginosa; heterotrophic bacteria; extracellular enzymes; algicidal substance; 1-hydroxyphenazine; heterotrophic partnership

期刊名称：POLISH JOURNAL OF ENVIRONMENTAL STUDIES （ 影响因子：1.699； 五年影响因子：1.654 ）

ISSN： 1230-1485

年卷期： 2021 年 30 卷 3 期

页码：

收录情况： SCI

摘要： It is a promising way to control Microcystis bloom by the algicidal substances from some special heterotrophic bacteria. However, the algicidal mechanism of the common known 1-hydroxyphenazine and the potential impact of extracellular degradative enzymes from total accompanying heterotrophic bacteria on its algicidal characteristics remains unknown. Here, the physiological changes of Microcystis aeruginosa were investigated under the stress of 1-hydroxyphenazine and extracellular degradative enzymes individually or together. The results showed that the extracellular degradative enzymes from heterotrophic bacteria had a weak inhibitory effect on the growth of M. aeruginosa and made M. aeruginosa suffered oxidative damage. 1-hydroxyphenazine promoted the cells death of M. aeruginosa with a manner independent of reactive oxygen species (ROS) level. 1-hydroxyphenazine might play a role in promoting the cyclic electron transport to reduce ROS in M. aeruginosa. The reduction of total anti-oxidative capacity and the depletion of glutathione might induce the death of M. aeruginosa under stress of 1-hydroxyphenazine. The addition of extracellular degradative enzymes eventually delayed the algae death and alleviated the inhibitory effect of 1-hydroxyphenazine on algal ATPase hydrolytic activity and total antioxidant capacity. The heterotrophic partnership seemed to be helpful to increase the stress resistance of M. aeruginosa.

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