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Pan X, Li Z, Li F, Huang Y, Wang Q, Huang S, Hu W, Jiang M. Thermohalobaculum xanthum gen. nov., sp. nov., a moderately thermophilic bacterium isolated from mangrove sediment. Antonie van Leeuwenhoek 2021; 114:1819-1828. [PMID: 34424448 DOI: 10.1007/s10482-021-01641-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/08/2021] [Indexed: 11/24/2022]
Abstract
A novel moderately thermophilic and halophilic bacterium, designated strain M0105T, was isolated from mangrove sediment collected in the Beibu Gulf, south China. The isolate is Gram-negative, non-motile and rod-shaped bacterium with smooth colonies of pale-yellow appearance. Growth occurs at 15-46 °C (optimum 37-40 °C) and pH range of 6.0-10.0 (optimum pH 8.0-9.0). It required 1-7% NaCl (optimum 3-5%) for growth. Strain M0105T was affiliated to the family 'Rhodobacteraceae', sharing the highest 16S rRNA gene sequence similarity with Limibaculum halophilum CAU 1123T (96.8%). The major menaquinone Q-10 and the dominant unsaturated fatty acid (C18:1ω7) in this family were also detected in the strain M0105T. The genome sequence possesses a circular 4.1 Mb chromosome with a G + C content of 67.9%. Strain M0105T encoded many genes for cellular stress resistance and nutrient utilization, which could improve its adaptive capacity to the mangrove environment. Values of conserved proteins (POCP), average nucleotide identity, average amino acid identity (AAI) and DNA-DNA hybridization (dDDH) between the isolate and closely related species were below the proposed threshold for species discrimination. Information from phenotypic, chemotaxonomic and phylogenetic analyses proposed that strain M0105T should be assigned to a novel genus within the family 'Rhodobacteraceae'. Thus, we suggested that the strain M0105T represents a novel species in a new genus, for which the name Thermohalobaculum xanthum gen. nov., sp. nov. is proposed. The type strain of the type species is M0105T (= BGMRC 2019T = KCTC 52118T = MCCC 1K03767T = NBRC 112057T).
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Affiliation(s)
- Xinli Pan
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Zhe Li
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Fei Li
- Guangxi Key Laboratory of Marine Environmental Science, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Yuanlin Huang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Qiaozhen Wang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Shushi Huang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Wenjin Hu
- State Key Laboratory of Non-Food Biomass Energy and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Bioscience and Technology Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China.
| | - Mingguo Jiang
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi University for Nationalities, Nanning, 530008, People's Republic of China.
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He Q, Dasi EA, Cheng Z, Talla E, Main K, Feng C, Ergas SJ. Wood and sulfur-based cyclic denitrification filters for treatment of saline wastewaters. BIORESOURCE TECHNOLOGY 2021; 328:124848. [PMID: 33611020 DOI: 10.1016/j.biortech.2021.124848] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
This study investigated the performance and microbiome of cyclic denitrification filters (CDFs) for wood and sulfur heterotrophic-autotrophic denitrification (WSHAD) of saline wastewater. Wood-sulfur CDFs integrated into two pilot-scale marine recirculating aquaculture systems achieved high denitrification rates (103 ± 8.5 g N/(m3·d)). The combined use of pine wood and sulfur resulted in lower SO42- accumulation compared with prior saline wastewater denitrification studies with sulfur alone. Although fish tank water quality parameters, including ammonia, nitrite, nitrate and sulfide, were below the inhibitory levels for marine fish production, lower survival rates of Poecilia sphenops were observed compared with prior studies. Heterotrophic denitrification was the dominant removal mechanism during the early operational stages, while sulfur autotrophic denitrification increased as readily biodegradable organic carbon released from wood chips decreased over time. 16S rRNA-based analysis of the CDF microbiome revealed that Sulfurimonas, Thioalbus, Defluviimonas, and Ornatilinea as notable genera that contributed to denitrification performance.
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Affiliation(s)
- Qiaochong He
- School of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China; Department of Civil & Environmental Engineering, University of South Florida, 74202 E. Fowler Ave, ENB 118, Tampa, FL 33620, USA; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Erica A Dasi
- Department of Civil & Environmental Engineering, University of South Florida, 74202 E. Fowler Ave, ENB 118, Tampa, FL 33620, USA
| | - Zhang Cheng
- Department of Civil & Environmental Engineering, University of South Florida, 74202 E. Fowler Ave, ENB 118, Tampa, FL 33620, USA
| | - Emmanuel Talla
- Aix Marseille Univ, CNRS, LCB, Laboratoire de Chimie Bactérienne, F-13009 Marseille, France
| | - Kevan Main
- Directorate of Fisheries and Aquaculture, Mote Marine Laboratory, 1600 Ken Thompson Parkway, Sarasota, FL 34236, USA
| | - Chuanping Feng
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Sarina J Ergas
- Department of Civil & Environmental Engineering, University of South Florida, 74202 E. Fowler Ave, ENB 118, Tampa, FL 33620, USA.
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Liu Y, Pei T, Zhang J, Yang F, Zhu H. Proposal for transfer of Defluviimonas alba to the genus Frigidibacter as Frigidibacter mobilis nom. nov. Int J Syst Evol Microbiol 2020; 70:3553-3558. [PMID: 32379019 DOI: 10.1099/ijsem.0.004216] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A polyphasic taxonomic study was undertaken to clarify the exact position of the type strain cai42T of the species Defluviimonas alba Pan et al. 2015. The results of the 16S rRNA gene sequence analysis indicated that the two sequences from cai42T shared 99.6 and 99.7 % similarity to that of the type strain SP32T of the species Frigidibacter albus and formed a coherent clade in the phylogenetic tree. Whole genomic comparison between cai42T and SP32T yielded a digital DNA-DNA hybridization estimate of 36.3 %, an average nucleotide identity of 88.8 % and an average amino acid identity of 89.8 %, clearly indicating that the two strains should belong to two genospecies of the same genus. The close relationship between the two strains was underpinned by the results of genome-based phylogenetic analysis. Although cai42T and SP32T shared similar physiological and biochemical properties, some striking differences, such as mobility, the temperature range for growth and the polar lipid components, could distinguish them as separate species. Therefore, the comparative phenotypic and genotypic analyses supported the incorporation of Defluviimonas alba into the genus Frigidibacter as Frigidibacter mobilis nom. nov. with the type strain cai42T (=CGMCC 1.12518T=LMG 27406T).
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, PR China
| | - Tao Pei
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, PR China
| | - Jun Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, PR China
| | - Fan Yang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, PR China
| | - Honghui Zhu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, PR China
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Chu C, Liu B, Lian Z, Zheng H, Chen C, Yue Z, Li L, Sun Z. Solirhodobacter olei gen. nov., sp. nov., a nonphotosynthetic bacterium isolated from oil-contaminated soil. Int J Syst Evol Microbiol 2019; 70:582-588. [PMID: 31613741 DOI: 10.1099/ijsem.0.003795] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A nonphotosynthetic, Gram-stain-negative, rod-shaped and motile strain, designated Pet-1T, was isolated from oil-contaminated soil collected from Daqing oil field in China. Optimal growth occurred at 37 °C, pH 5.5 and in 1 % (w/v) NaCl. Q-10 was the sole respiratory quinone. The most abundant fatty acid was C18 : 1ɷ7c/C18 : 1ɷ6c (67.4 %). The major polar lipids were phosphatidylglycerol, aminolipid, phosphatidylethanolaine, phosphatidycholine, two unidentified lipids and two unidentified phospholipids. The genomic DNA G+C content was 69.3 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that Pet-1T shared the highest similarity (95.1 %) to Rhodobacter vinaykumarii DSM 18714T, followed by Sinorhodobacter populi sk2b1T (95.0 %) and Haematobacter massiliensis CCUG 47968T (95.0 %). In the phylogenetic tree, strain Pet-1T formed a separate branch from the closely related genera Rhodobacter, Pararhodobacter, Defluviimonas and Rhodovulum within the family Rhodobacteraceae. Based on the data from the current polyphasic study, it is proposed that the isolate is a novel species of a novel genus within the family Rhodobacteraceae, with the name Solirhodobacter olei gen. nov., sp. nov. The type strain of the type species is Pet-1T (=KCTC 72074T =CCTCC AB 2018368T).
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Affiliation(s)
- Cuiwei Chu
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Bin Liu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Ziyi Lian
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Huiying Zheng
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Can Chen
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Zonghao Yue
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Lili Li
- Henan Key Laboratory of Molecular Breeding and Bioreactor, Zhoukou, Henan 466001, PR China.,College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Zhongke Sun
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
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Hahyoungchilella caricis gen. nov., sp. nov., isolated from a rhizosphere mudflat of a halophyte (Carex scabrifolia), transfer of Thioclava arenosa Thongphrom et al. 2017 to Pseudothioclava as Pseudothioclava arenosa gen. nov., comb. nov. and proposal of Thioclava electrotropha Chang et al. 2018 as a later heterosynonym of Thioclava sediminum. J Microbiol 2019; 57:1048-1055. [DOI: 10.1007/s12275-019-9260-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/09/2019] [Accepted: 08/10/2019] [Indexed: 10/25/2022]
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Defluviimonas pyrenivorans sp. nov., a novel bacterium capable of degrading polycyclic aromatic hydrocarbons. Int J Syst Evol Microbiol 2018; 68:957-961. [DOI: 10.1099/ijsem.0.002629] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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