PMID- 33839120 OWN - NLM STAT- MEDLINE DCOM- 20210701 LR - 20210701 IS - 1096-0953 (Electronic) IS - 0013-9351 (Linking) VI - 197 DP - 2021 Jun TI - The algicidal efficacy and the mechanism of Enterobacter sp. EA-1 on Oscillatoria dominating in aquaculture system. PG - 111105 LID - S0013-9351(21)00399-6 [pii] LID - 10.1016/j.envres.2021.111105 [doi] AB - The global escalation and intensification of cyanobacterial blooms require powerful algaecides. This study investigated the algicidal efficacy and mechanism of EA-1 against Oscillatoria. Bacteria EA-1, identified as Enterobacter, was isolated with high algicidal activity against harmful cyanobacteria. Results showed that a complete removal of Oscillatoria was observed within 3 days with the initial Chl-a concentration of 1.74 mg/L. Physiological responses of Oscillatoria revealed that EA-1 induced severe lipid peroxidation and the ultimate decline of antioxidant enzyme activities. Moreover, the contents for both intracellular protein and carbohydrate of each algae cell increased first and then decreased. Scanning electron microscope (SEM) and transmission electron microscopy (TEM) analysis clarified that the possible process of Oscillatoria lysis included the breach of cross wall, followed by the disruption of photosynthetic membrane and incipient nucleus, and the ultimate outflow of inclusion. Confocal laser scanning microscopy (CLSM) analysis illustrated the degradation process of incipient nucleus in Oscillatoria. CI - Copyright (c) 2021 Elsevier Inc. All rights reserved. FAU - Lu, Lu AU - Lu L AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China. FAU - Niu, Xiaojun AU - Niu X AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, College of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China. Electronic address: scutenv@outlook.com. FAU - Zhang, Dongqing AU - Zhang D AD - Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, College of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, PR China. Electronic address: dqzhang3377@outlook.com. FAU - Ma, Jinling AU - Ma J AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China. FAU - Zheng, Xiaoxian AU - Zheng X AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China. FAU - Xiao, Huaping AU - Xiao H AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China. FAU - Huang, Xuyin AU - Huang X AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China. FAU - Lin, Zhang AU - Lin Z AD - School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China. FAU - Hu, Huijian AU - Hu H AD - Institute of Zoology, Guangdong Academy of Sciences, PR China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210409 PL - Netherlands TA - Environ Res JT - Environmental research JID - 0147621 RN - 0 (Antioxidants) SB - IM MH - Antioxidants MH - Aquaculture MH - *Cyanobacteria MH - Enterobacter MH - *Oscillatoria OTO - NOTNLM OT - Enterobacter OT - Incipient nucleus OT - Inhibition rate OT - Oscillatoria OT - Physiological responses OT - Ultrastructure EDAT- 2021/04/12 06:00 MHDA- 2021/07/02 06:00 CRDT- 2021/04/11 20:30 PHST- 2020/12/16 00:00 [received] PHST- 2021/03/20 00:00 [revised] PHST- 2021/03/29 00:00 [accepted] PHST- 2021/04/12 06:00 [pubmed] PHST- 2021/07/02 06:00 [medline] PHST- 2021/04/11 20:30 [entrez] AID - S0013-9351(21)00399-6 [pii] AID - 10.1016/j.envres.2021.111105 [doi] PST - ppublish SO - Environ Res. 2021 Jun;197:111105. doi: 10.1016/j.envres.2021.111105. Epub 2021 Apr 9.