Higher sensitivity to hydrogen peroxide and light stress conditions of the microcystin producer Microcystis aeruginosa sp PCC7806 compared to non-producer strains.

Latour Delphine; Perriere Fanny; Purdie Duncan

首页> 外文期刊>Harmful Algae >Higher sensitivity to hydrogen peroxide and light stress conditions of the microcystin producer Microcystis aeruginosa sp PCC7806 compared to non-producer strains.

【24h】

Higher sensitivity to hydrogen peroxide and light stress conditions of the microcystin producer Microcystis aeruginosa sp PCC7806 compared to non-producer strains.

机译：Higher sensitivity to hydrogen peroxide and light stress conditions of the microcystin producer Microcystis aeruginosa sp PCC7806 compared to non-producer strains.

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

The increasing incidence of cyanobacterial blooms with their associated production of cyanotoxins lead managers of aquatics systems to control their biomass to limit the health risk. Among the variety of existing treatment approaches, hydrogen peroxide (H2O2) shows increasing use but the effects of environmental parameters on its effectiveness are still not completely known. With the aim to assess the efficiency of H2O2 treatments in the control of cyanobacterial blooms and decrease toxic risk, we tested three Microcystis strains according to their ability to produce cyanotoxins (a microcystin-producing, non-microcystin-producing and mcyB-knockout mutant). Photochemical efficiency, percentage of living cells and microcystin cell content were compared under various hydrogen peroxide concentrations coupled with stress conditions encountered during the life cycle of cyanobacteria as darkness and high light. The microcystin-producing strain appeared the more sensitive to hydrogen peroxide treatment and to light condition, probably due to a lower rate of repair of Photo System II (PSII). We also highlighted various responses of PSII activity according to Microcystis strains which could partly explain the shift of dominant genotypes often occurring during a bloom event. Our results confirm the link between light and microcystin content and variations of microcystin contents appear as a consequence of photosynthetic activity. These findings could be of particular interest regarding water quality management, especially the use of H2O2 as a potential algaecide which seems to be more effective to use during periods of high light.

著录项

来源
《Harmful Algae》 |2022年第5期|102219.1-102219.9|共9页
作者
Latour Delphine; Perriere Fanny; Purdie Duncan;
展开▼
作者单位

Univ Clermont Auvergne, CNRS, UMR 6023, LMGE, F-63178 Aubiere, France;

Univ Southampton, Natl Oceanog Ctr, Waterfront Campus,European Way, Southampton SO14 3ZH, Hants, England;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类
关键词
Microcystis; Hydrogen peroxide; Light and oxidative stress; Photochemical efficiency; lt; pgt; mcyB-knockout mutant; nbsp; microcystinlt; /pgt;

Higher sensitivity to hydrogen peroxide and light stress conditions of the microcystin producer Microcystis aeruginosa sp PCC7806 compared to non-producer strains.

摘要

著录项

相关主题

期刊订阅