Volume 18 Issue 3
Jun.  2022
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YUAN Keting, REN Dajun, WAN Qiong, CHAI Beibei, KANG Aiqing, LEI Xiaohui, CHEN Bin, Chen Xiang. Algae-lysing characteristics of an algicidal bacterium G2 from reservoir sediment[J]. South China Fisheries Science, 2022, 18(3): 139-146. DOI: 10.12131/20210187
Citation: YUAN Keting, REN Dajun, WAN Qiong, CHAI Beibei, KANG Aiqing, LEI Xiaohui, CHEN Bin, Chen Xiang. Algae-lysing characteristics of an algicidal bacterium G2 from reservoir sediment[J]. South China Fisheries Science, 2022, 18(3): 139-146. DOI: 10.12131/20210187
shu

Algae-lysing characteristics of an algicidal bacterium G2 from reservoir sediment

  • 1.

    School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

  • 2.

    Hebei Key Laboratory of Intelligent Water Conservancy, Hebei University of Engineering, Handan 056038, China

  • 3.

    School of Water Conservancy and Hydroelectric, Hebei University of Engineering, Handan 056038, China

  • 4.

    China Institute of Water Resources and Hydropower Research, Beijing 100038, China

  • 5.

    Innovation Center for Water Pollution Control and Water Ecological Remediation, Hebei University of Engineering, Handan 056038, China

  • 6.

    Shanghai Investigation, Design and Research Institute, Shanghai 200434, China

  • 7.

    China Three Gorges Corporation, Wuhan, 430010, China

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  • Received Date: June 28, 2021
  • Revised Date: August 01, 2021
  • Accepted Date: September 13, 2021
  • Available Online: March 28, 2022
    Graphical Abstract
    • Abstract
  • Microcystis aeruginosa can cause algal blooms, which has been a serious threat to the water environment. Microbial algae removal is a technology with good application prospects. In this study, we isolated a new algae-dissolving bacterium G2 from the reservoir substrate of Xi'an of Shaanxi Province, identified as Cellvibrio sp. according to 16S rDNA sequence analysis (GenBank accession No.: MW221316), and investigated the feasibility of G2's solubilizing M. aeruginosa. Results show that G2 solubilized algae by secreting extracellular substances indirectly, and it had the best removal effect on algae during the stabilization period. Increasing G2 dosing ratio (>10%) contributed to the effect of algae dissolution. G2 was sensitive to the change of temperature, and the algae removal rate reached (59.42±0.88)% and (63.10±1.42)% at 5 and 25 ℃, respectively. The removal efficiency was poor at temperatures higher than 75 ℃. The pH and light had no significant influences on the algae removal effect, and G2 had strong tolerance to acid and alkali (pH 3−11). In conclusion, G2 can inhibit the growth of M. aeruginosa efficiently, so it is a promising biocontrol agent to mitigate cyanobacterial blooms.
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