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Le VV, Ko SR, Oh HM, Ahn CY. Genomic Insights into Paucibacter aquatile DH15, a Cyanobactericidal Bacterium, and Comparative Genomics of the Genus Paucibacter. J Microbiol Biotechnol 2023; 33:1615-1624. [PMID: 37811910 PMCID: PMC10772561 DOI: 10.4014/jmb.2307.07008] [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: 07/06/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 10/10/2023]
Abstract
Microcystis blooms threaten ecosystem function and cause substantial economic losses. Microorganism-based methods, mainly using cyanobactericidal bacteria, are considered one of the most ecologically sound methods to control Microcystis blooms. This study focused on gaining genomic insights into Paucibacter aquatile DH15 that exhibited excellent cyanobactericidal effects against Microcystis. Additionally, a pan-genome analysis of the genus Paucibacter was conducted to enhance our understanding of the ecophysiological significance of this genus. Based on phylogenomic analyses, strain DH15 was classified as a member of the species Paucibacter aquatile. The genome analysis supported that strain DH15 can effectively destroy Microcystis, possibly due to the specific genes involved in the flagellar synthesis, cell wall degradation, and the production of cyanobactericidal compounds. The pan-genome analysis revealed the diversity and adaptability of the genus Paucibacter, highlighting its potential to absorb external genetic elements. Paucibacter species were anticipated to play a vital role in the ecosystem by potentially providing essential nutrients, such as vitamins B7, B12, and heme, to auxotrophic microbial groups. Overall, our findings contribute to understanding the molecular mechanisms underlying the action of cyanobactericidal bacteria against Microcystis and shed light on the ecological significance of the genus Paucibacter.
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Affiliation(s)
- Ve Van Le
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, Daejeon 34141, Republic of Korea
| | - So-Ra Ko
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, Daejeon 34141, Republic of Korea
| | - Hee-Mock Oh
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, Daejeon 34141, Republic of Korea
- Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Chi-Yong Ahn
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, Daejeon 34141, Republic of Korea
- Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology, Daejeon 34113, Republic of Korea
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Meng S, Xu H, Qin L, Chen X, Qiu L, Li D, Song C, Fan L, Hu G, Xu P. The Gill-Associated Bacterial Community Is More Affected by Exogenous Chlorella pyrenoidosa Addition than the Bacterial Communities of Water and Fish Gut in GIFT Tilapia ( Oreochromis niloticus) Aquaculture System. BIOLOGY 2023; 12:1209. [PMID: 37759608 PMCID: PMC10525419 DOI: 10.3390/biology12091209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/17/2023] [Accepted: 08/26/2023] [Indexed: 09/29/2023]
Abstract
Microalgae has been widely used in aquaculture to improve both the water environment and fish growth; however, the current understanding of the effects of microalgae addition on the key players involved in regulating the water environment and fish health, such as microorganisms, remains limited. Here, a 50-day mesocosm experiment was set up to simulate the culture of Genetic Improvement of Farmed Tilapia (GIFT, Oreochromis niloticus) with an average weight of 14.18 ± 0.93 g and an average length of 82.77 ± 2.80 mm. Different amounts of Chlorella pyrenoidosa were added into these artificial systems to investigate dynamics of bacterial communities in aquaculture water, fish gill, and gut using amplicon-based high-throughput sequencing technology. Our results showed that Chlorella pyrenoidosa addition increased diversity and network complexity of gill-associated bacterial communities rather than those of the water and gut. Furthermore, more biomarkers in the gill-associated bacterial communities were detected in response to Chlorella pyrenoidosa addition than the water and fish gut samples. These findings highlighted the high sensitivity of gill-associated bacterial communities in response to the Chlorella pyrenoidosa addition, implying Chlorella pyrenoidosa addition could play important roles in regulating the fish mucosal immunity by altering the gill-associated microbiota.
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Affiliation(s)
- Shunlong Meng
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Huimin Xu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
| | - Lu Qin
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Xi Chen
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
| | - Liping Qiu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
| | - Dandan Li
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
| | - Chao Song
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Limin Fan
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Gengdong Hu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
| | - Pao Xu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi 214081, China; (S.M.); (H.X.); (X.C.); (L.Q.); (D.L.); (C.S.); (L.F.); (G.H.)
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China;
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