Identifying Algicides of Enterobacter hormaechei F2 for Control of the Harmful Alga Microcystis aeruginosa

Abstract

Eutrophication has become an increasingly serious environmental issue and has contributed towards an explosion in harmful algal blooms (HABs) affecting local development. HABs can cause serious threats to ecosystems and human health. A newly isolated algicidal strain, Enterobacter hormaechei F2, showed high algicidal activity against the typical HAB species Microcystis aeruginosa. Potential algicides were detected through liquid chromatograph–mass spectrometer analysis, revealing that prodigiosin is an algicide and PQS is a quorum sensing molecule. RNA-seq was used to understand the algicidal mechanisms and the related pathways. We concluded that the metabolism of prodigiosin and PQS are active at the transcriptional level. The findings indicate that E. hormaechei F2 can be used as a potential biological agent to control harmful algal blooms to prevent the deterioration of the ecological and economic value of water bodies.

Transcriptome Analysis Reveals the Algicidal Mechanism of Brevibacillus laterosporus against Microcystis aeruginosa through Multiple Metabolic Pathways

“…Among them, the expression of prodigiosin biosynthesis pathway is up-regulated. Prodigiosin (PG) is a kind of natural pigment with insecticidal activity [ 23 ], bactericidal [ 24 ], and algicidal [ 25 ] effects. In addition to inhibiting Heterosigma akashiwo [ 26 ] and Phaeocystis globosa [ 27 ], PG isolated from Hahella sp.…”

Prodigiosin: unveiling the crimson wonder – a comprehensive journey from diverse bioactivity to synthesis and yield enhancement

“…Effective monitoring and management strategies are crucial to mitigate these adverse effects. PG demonstrates effectiveness in controlling various algae species, including Prorocentrum donghaiense ( Chen et al, 2021 ), red tide dinoflagellates ( Jeong et al, 2005 ), Heterosigma akashiwo ( Zhang et al, 2020 ), Phaeocystis globosa ( Zhang et al, 2016 ), and Microcystis aeruginosa ( Zhang et al, 2022 ), without harming non-target organisms such as fish. Its mechanism of action involves inducing ROS production and lipid peroxidation while inhibiting the cell cycle of harmful algae.…”

Current and Previous Green Technologies, Their Efficiency, Associated Problems, and Success Rates to Mitigate M. aeruginosa in Aquatic Environments

“…A novel, wide-ranging freshwater cyanophage called MinS1has the ability to infect multiple different cyanobacterial orders and could be used as a biological control measure against cyanobacterial blooms [184]. In host-range experiments, a novel freshwater cyanophage called Mae-Yong1326-1 was effective in lysing M. aeruginosa FACHB-1326 [181].…”