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Zhang L, Guo L, Cui Z, Ju F. Exploiting predatory bacteria as biocontrol agents across ecosystems. Trends Microbiol 2024; 32:398-409. [PMID: 37951768 DOI: 10.1016/j.tim.2023.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 11/14/2023]
Abstract
Predatory bacteria have been increasingly known for their ubiquity in environments and great functional potentials in controlling unwanted microorganisms. Fundamental understanding of the predation mechanisms, population dynamics, and interaction patterns underlying bacterial predation is required for wise exploitation of predatory bacteria for enhancing ecoenvironmental, animal, and human health. Here, we review the recent achievements on applying predatory bacteria in different systems as biocontrol agents and living antibiotics as well as new findings in their phylogenetic diversity and predation mechanisms. We finally propose critical issues that deserve priority research and highlight the necessity to combine classic culture-based and advanced culture-independent approaches to push research frontiers of bacterial predation across ecosystems for promising biocontrol and therapy strategies towards a sustainable ecoenvironment and health.
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Affiliation(s)
- Lu Zhang
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang Province, China; Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang Province, China; Center of Synthetic Biology and Integrated Bioengineering, Westlake University, Hangzhou, Zhejiang Province, China; Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang Province, China
| | - Lingyun Guo
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang Province, China; Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang Province, China; Center of Synthetic Biology and Integrated Bioengineering, Westlake University, Hangzhou, Zhejiang Province, China
| | - Zhongli Cui
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture and Rural Affairs, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Feng Ju
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang Province, China; Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang Province, China; Center of Synthetic Biology and Integrated Bioengineering, Westlake University, Hangzhou, Zhejiang Province, China; Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang Province, China; Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang Province, China.
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Wei P, Li J, Zhang J, Zhang Y, Luo R, Xie C, Wang Z. Bioaugmentation with an aerobic denitrifying bacterium with quorum quenching activity for improved nitrogen removal and reduced membrane fouling in anoxic/oxic membrane bioreactor. RSC Adv 2023; 13:2345-2354. [PMID: 36741184 PMCID: PMC9841441 DOI: 10.1039/d2ra06676a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 12/26/2022] [Indexed: 01/17/2023] Open
Abstract
In this study, an aerobic denitrifying bacterium with quorum quenching activity, Acinetobacter sp. WZL728, was inoculated into the anoxic/oxic membrane bioreactor (A/O-MBR) to study its effects on A/O-MBR performance. The pollutant removal and membrane fouling between A/O-MBR with WZL728 (EMBR) and A/O-MBR without WZL728 (CMBR) were compared. WZL728 increased the total nitrogen removal efficiency from 75.05% in CMBR to 91.03% in EMBR and extended the filtration cycle from 5.44 days in CMBR to 9.57 days in EMBR, which indicated that WZL728 improved the pollutant removal performance and mitigated membrane fouling of A/O-MBR. The concentration of N-acyl-homoserine lactones in the biocake of EMBR (EMBRB) was 11.23% of that in the biocake of CMBR (CMBRB). The content of extracellular polymeric substances (EPS) in EMBRB was 69.00% of that in CMBRB. The abundance of bacteria associated with EPS secretion (Alpthaproteobacteria) decreased and the abundance of bacteria associated with EPS degradation (Clostridia) increased in EMBRB. Valine, alanine and uridine diphosphate-N-acetylgalactosamine associated with protein and polysaccharide synthesis were significantly lower in EMBRB than those in CMBRB, which revealed the reason for the decrease of protein and polysaccharide content of EPS within EMBRB. This study provides useful information for improving A/O-MBR performance by probiotics.
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Affiliation(s)
- Pengyuan Wei
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of TechnologyBeijing 100124PR China
| | - Jun Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of TechnologyBeijing 100124PR China
| | - Jing Zhang
- Beijing City Drainage Refco Group LtdBeijing 100124PR China
| | - Yi Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of TechnologyBeijing 100124PR China
| | - Rong Luo
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of TechnologyBeijing 100124PR China
| | - Chaofan Xie
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of TechnologyBeijing 100124PR China
| | - Zhaozhao Wang
- The College of Energy and Environmental Engineering, Hebei University of EngineeringHandan 056038PR China
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