RRC ID 56452
著者 Yu Y, Zeng Y, Li J, Yang C, Zhang X, Luo F, Dai X.
タイトル An algicidal Streptomyces amritsarensis strain against Microcystis aeruginosa strongly inhibits microcystin synthesis simultaneously.
ジャーナル Sci Total Environ
Abstract Microcystis aeruginosa and hepatotoxic microcystins produced by it have posed a severe threat to aquatic ecological security and human health. In this study a Streptomyces amritsarensis HG-16, showing high algicidal activity against M. aeruginosa and strong inhibitory effect on microcystin synthesis, was obtained by screening some anti-Fusarium sp. microbial strains isolated before in our laboratory. HG-16 bound cyanobacterial cells by mycelia to form flocs and killed M. aeruginosa by secreting active substances, which were proteinase K resistant and stable in the temperature range of 35-75 °C and pH range of 3-11. HG-16 removed M. aeruginosa of 105 and 106 cell mL-1 cell densities in similar rate and was active against all the tested harmful unicellular and filamentous cyanobacteria. Results of differential gene expression analysis indicated that HG-16 affected the photosynthesis system and microcystin synthesis of M. aeruginosa. Accordingly, the algicidal activity of HG-16 was light-dependent, and microcystin synthesis of M. aeruginosa decreased by 91.2% with HG-16 treatment. Thus, it is promising to utilize HG-16 to mitigate harmful cyanobacterial blooms, inhibit microcystin synthesis and control plant disease caused by Fusarium.spp. through irrigating farmland with eutrophic water applied HG-16.
巻・号 650(Pt 1)
ページ 34-43
公開日 2019-2-10
DOI 10.1016/j.scitotenv.2018.08.433
PII S0048-9697(18)33408-9
PMID 30195130
MeSH Herbicides / pharmacology* Microcystins / biosynthesis* Microcystis / drug effects* Streptomyces / chemistry*
IF 5.589
引用数 8
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