期刊
JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
卷 82, 期 15, 页码 845-853出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15287394.2019.1660466
关键词
Algicidal bacteria; Microcystis aeruginosa; cyanobacterial harmful algal blooms (CyanoHABs); Chryseobacterium
资金
- National Natural Science Foundation [81773393, 81502787]
- Central South University Innovation Driven Project [20170027010004]
- National Public Welfare Industrial Foundation [201503108]
- Key Research and Development Projects in Hunan Province [2018WK2013]
- Program for College students Free Exploration [201810533360, 201810533358, S201910533279, 20190027020022]
- [2014EME001]
Harmful Microcystis aeruginosa blooms occurred frequently in many eutrophic lakes and rivers with resultant serious global environmental consequences. Algicidal bacteria may play an important role in inhibiting the growth of Microcystis aeruginosa and are considered as an effective method for preventing the appearance of blooms. In order to counteract the harmful effects of Microcystis aeruginosa, a critical step is to identify, isolate and characterize indigenous algicidal bacteria. This study aimed to isolate a novel indigenous algicidal bacterium identified as Chryseobacterium species based upon its 16S rDNA sequence analysis, and determine whether this bacterium was effective in lysing Microcystis aeruginosa FACHB 905. The influence of environmental factors including temperature, pH, quantity of Chryseobacterium species as well as Microcystis aeruginosa concentration were examined with respect to algae-lysing properties of this bacterial strain. Data demonstrated that the highest algae-lysing activity of 80% against Microcystis aeruginosa FACHB 905 occurred within 72 hr. In addition, the algae-lysing activities of Chryseobacterium species cells were significantly higher than those of cell-free supernatant. In conclusion, data showed the algicidal bacterium Chryseobacterium species exhibited potent Microcystis aeruginosa-lysing activities and attacked Microcystis aeruginosa directly suggesting this algicidal bacterium may be potentially useful for reducing the number of harmful Microcystis aeruginosa blooms.
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