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Melnikov OI, Rozova ON, Reshetnikov AS, Khmelenina VN, Mustakhimov II. Mannitol as a Growth Substrate for Facultative Methylotroph Methylobrevis pamukkalensis PK2. Curr Microbiol 2024; 81:300. [PMID: 39110243 DOI: 10.1007/s00284-024-03795-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 07/02/2024] [Indexed: 08/15/2024]
Abstract
Biochemistry of carbon assimilation in aerobic methylotrophs growing on reduced C1 compounds has been intensively studied due to the vital role of these microorganisms in nature. The biochemical pathways of carbon assimilation in methylotrophs growing on multi-carbon substrates are insufficiently explored. Here we elucidated the metabolic route of mannitol assimilation in the alphaproteobacterial facultative methylotroph Methylobrevis pamukkalensis PK2. Two key enzymes of mannitol metabolism, mannitol-2-dehydrogenase (MTD) and fructokinase (FruK), were obtained as His-tagged proteins by cloning and expression of mtd and fruK genes in Escherichia coli and characterized. Genomic analysis revealed that further transformation of fructose-6-phosphate proceeds via the Entner-Doudoroff pathway. During growth on mannitol + methanol mixture, the strain PK2 consumed both substrates simultaneously demonstrating independence of C1 and C6 metabolic pathways. Genome screening showed that genes for mannitol utilization enzymes are present in other alphaproteobacterial methylotrophs predominantly capable of living in association with plants. The capability to utilize a variety of carbohydrates (sorbitol, glucose, fructose, arabinose and xylose) suggests a broad adaptability of the strain PK2 to live in environments where availability of carbon substrate dynamically changes.
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Affiliation(s)
- Oleg I Melnikov
- Laboratory of Methylotrophy, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, 142290, Pushchino, Russian Federation
| | - Olga N Rozova
- Laboratory of Methylotrophy, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, 142290, Pushchino, Russian Federation.
| | - Alexander S Reshetnikov
- Laboratory of Methylotrophy, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, 142290, Pushchino, Russian Federation
| | - Valentina N Khmelenina
- Laboratory of Methylotrophy, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, 142290, Pushchino, Russian Federation
| | - Ildar I Mustakhimov
- Laboratory of Methylotrophy, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, 142290, Pushchino, Russian Federation
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Sharavin DY, Belyaeva PG. Biotechnological potential of psychrotolerant methylobacteria isolated from biotopes of Antarctic oases. Arch Microbiol 2024; 206:323. [PMID: 38907777 DOI: 10.1007/s00203-024-04056-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 06/16/2024] [Indexed: 06/24/2024]
Abstract
Ten strains of psychrotolerant methylotrophic bacteria were isolated from the samples collected in Larsemann and Bunger Hills (Antarctica). Most of the isolates are assigned to the genus Pseudomonas, representatives of the genera Janthinobacterium, Massilia, Methylotenera and Flavobacterium were also found. Majority of isolates were able to grow on a wide range of sugars, methylamines and other substrates. Optimal growth temperatures for the isolated strains varied from 6 °C to 28 °C. The optimal concentration of NaCl was 0.5-2.0%. The optimal pH values of the medium were 6-7. It was found that three strains synthesized indole-3-acetic acid on a medium with L-tryptophan reaching 11-12 μg/ml. The values of intracellular carbohydrates in several strains exceeded 50 μg/ml. Presence of calcium-dependent and lanthanum-dependent methanol dehydrogenase have been shown for some isolates. Strains xBan7, xBan20, xBan37, xBan49, xPrg27, xPrg48, xPrg51 showed the presence of free amino acids. Bioprospection of Earth cryosphere for such microorganisms has a potential in biotechnology.
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Affiliation(s)
- Dmitry Yuryevich Sharavin
- Laboratory of Cellular Immunology and Nanobiotechnology, Institute of Ecology and Genetics of Microorganisms (IEGM), 13, Golev st., Perm, 614081, Russia.
| | - Polina Gennadievna Belyaeva
- Laboratory of Cellular Immunology and Nanobiotechnology, Institute of Ecology and Genetics of Microorganisms (IEGM), 13, Golev st., Perm, 614081, Russia
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Proença DN, Whitman WB, Shapiro N, Woyke T, Kyrpides NC, Morais PV. Faunimonas pinastri gen. nov., sp. nov., an endophyte from a pine tree of the family Pleomorphomonadaceae, class Alphaproteobacteria. Int J Syst Evol Microbiol 2022; 72. [PMID: 36748409 DOI: 10.1099/ijsem.0.005623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Bacterial strain A52C2T was isolated from the endophytic microbial community of a Pinus pinaster tree trunk and characterized. Strain A52C2T stained Gram-negative and formed rod-shaped cells that grew optimally at 30 °C and at pH 6.0-7.0. The G+C content of the DNA was 65.1 mol %. The respiratory quinone was ubiquinone 10, and the major fatty acids were cyclo-C19:0 ω8c and C18:0, representing 70.1 % of the total fatty acids. Phylogenetic analyses based on the 16S rRNA gene sequences placed strain A52C2T in a distinct lineage within the order Hyphomicrobiales, family Pleomorphomonadaceae. The 16S rRNA gene sequence similarities of A52C2T to that of Mongoliimonas terrestris and Oharaeibacter diazotrophicus were 93.15 and 93.2 %, respectively. The draft genome sequence of strain A52C2T comprises 4 196 045 bases with a 195-fold mapped coverage of the genome. The assembled genome consists of 43 contigs of more than 1 000 bp (N50 contig size was 209 720 bp). The genome encodes 4033 putative coding sequences. The phylogenetic, phenotypic and chemotaxonomic data showed that strain A52C2T (=UCCCB 130T=CECT 8949T=LMG 29042T) represents the type of a novel species and genus, for which we propose the name Faunimonas pinastri gen. nov., sp. nov.
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Affiliation(s)
- Diogo N Proença
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - William B Whitman
- Department of Microbiology, 527 Biological Sciences Building, University of Georgia, Athens, GA 30602-2605, USA
| | - Nicole Shapiro
- DOE Joint Genome Institute, 1 Cyclotron Rd, Berkeley, CA 94720, USA
| | - Tanja Woyke
- DOE Joint Genome Institute, 1 Cyclotron Rd, Berkeley, CA 94720, USA
| | - Nikos C Kyrpides
- DOE Joint Genome Institute, 1 Cyclotron Rd, Berkeley, CA 94720, USA
| | - Paula V Morais
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
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Carmona-Martínez AA, Marcos-Rodrigo E, Bordel S, Marín D, Herrero-Lobo R, García-Encina PA, Muñoz R. Elucidating the key environmental parameters during the production of ectoines from biogas by mixed methanotrophic consortia. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113462. [PMID: 34365180 DOI: 10.1016/j.jenvman.2021.113462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 07/06/2021] [Accepted: 07/31/2021] [Indexed: 05/12/2023]
Abstract
Anaerobic digestion (AD) is a robust biotechnology for the valorisation of organic waste into biogas. However, the rapid decrease in renewable electricity prices requires alternative uses of biogas. In this context, the engineering of innovative platforms for the bio-production of chemicals from CH4 has recently emerged. The extremolyte and osmoprotectant ectoine, with a market price of ~1000€/Kg, is the industrial flagship of CH4-based bio-chemicals. This work aimed at optimizing the accumulation of ectoines using mixed microbial consortia enriched from saline environments (a salt lagoon and a salt river) and activated sludge, and biogas as feedstock. The influence of NaCl (0, 3, 6, 9 and 12 %) and Na2WO4 (0, 35 and 70 μg L-1) concentrations and incubation temperature (15, 25 and 35 °C) on the stoichiometry and kinetics of the methanotrophic consortia was investigated. Consortia enriched from activated sludge at 15 °C accumulated the highest yields of ectoine and hydroxyectoine at 6 % NaCl (105.0 ± 27.2 and 24.2 ± 5.4 mgextremolyte gbiomass-1, respectively). The consortia enriched from the salt lagoon accumulated the highest yield of ectoine and hydroxyectoine at 9 % NaCl (56.6 ± 2.5 and 51.0 ± 2.0 mgextremolyte gbiomass-1, respectively) at 25 °C. The supplementation of tungsten to the cultivation medium did not impact on the accumulation of ectoines in any of the consortia. A molecular characterization of the enrichments revealed a relative abundance of ectoine-accumulating methanotrophs of 7-16 %, with Methylomicrobium buryatense and Methylomicrobium japanense as the main players in the bioconversion of methane into ectoine.
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Affiliation(s)
- Alessandro A Carmona-Martínez
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain
| | - Eva Marcos-Rodrigo
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain
| | - Sergio Bordel
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain
| | - David Marín
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain
| | - Raquel Herrero-Lobo
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain
| | - Pedro A García-Encina
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain
| | - Raúl Muñoz
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain; Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid, 47011, Spain.
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Methylobrevis albus sp. nov., isolated from freshwater lake sediment. Arch Microbiol 2021; 203:4549-4556. [PMID: 34152426 DOI: 10.1007/s00203-021-02442-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/13/2021] [Accepted: 06/08/2021] [Indexed: 10/21/2022]
Abstract
An aerobic, Gram-stain-negative, rod-shaped bacterium with flagellum, designated L22T, was isolated from sediment of Hulun Lake, Inner Mongolia, China. The organism was found to grow optimally at 30° C in a medium containing 0-0.75% (w/v) NaCl at pH 7.5. The major fatty acid identified was summed feature 8 (C18:1ω7c). The dominant polar lipids were phosphomonoester, phosphatidylethanolamine, phosphatidylglycerol and phosphatidylcholine. The main respiratory quinone was Q-10. The draft genome sequence of strain L22T consisted of 4354,788 bp. The G + C content of genomic DNA was 69.8 mol %. The 16S rRNA gene sequences indicated that strain L22T was affiliated with the genus Methylobrevis within the family Pleomorphomonadaceae, being most closely related to Methylobrevis pamukkalensis JCM 30229T with 95.9% 16S rRNA gene sequences similarity. The AAI, ANI and dDDH values between strain L22T and M. pamukkalensis JCM 30229T were 72.5%, 80.7% and 22.7%. Based on taxonomic results in this study, we proposed that strain L22T a novel species in the genus Methylobrevis of the family Pleomorphomonadaceae, for which the name Methylobrevis albus sp. nov. is proposed. The type strain is L22T (=KCTC 72858T=MCCC 1H00432T).
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Hördt A, López MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Göker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468. [PMID: 32373076 PMCID: PMC7179689 DOI: 10.3389/fmicb.2020.00468] [Citation(s) in RCA: 223] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 03/04/2020] [Indexed: 11/13/2022] Open
Abstract
The class Alphaproteobacteria is comprised of a diverse assemblage of Gram-negative bacteria that includes organisms of varying morphologies, physiologies and habitat preferences many of which are of clinical and ecological importance. Alphaproteobacteria classification has proved to be difficult, not least when taxonomic decisions rested heavily on a limited number of phenotypic features and interpretation of poorly resolved 16S rRNA gene trees. Despite progress in recent years regarding the classification of bacteria assigned to the class, there remains a need to further clarify taxonomic relationships. Here, draft genome sequences of a collection of genomes of more than 1000 Alphaproteobacteria and outgroup type strains were used to infer phylogenetic trees from genome-scale data using the principles drawn from phylogenetic systematics. The majority of taxa were found to be monophyletic but several orders, families and genera, including taxa recognized as problematic long ago but also quite recent taxa, as well as a few species were shown to be in need of revision. According proposals are made for the recognition of new orders, families and genera, as well as the transfer of a variety of species to other genera and of a variety of genera to other families. In addition, emended descriptions are given for many species mainly involving information on DNA G+C content and (approximate) genome size, both of which are confirmed as valuable taxonomic markers. Similarly, analysis of the gene content was shown to provide valuable taxonomic insights in the class. Significant incongruities between 16S rRNA gene and whole genome trees were not found in the class. The incongruities that became obvious when comparing the results of the present study with existing classifications appeared to be caused mainly by insufficiently resolved 16S rRNA gene trees or incomplete taxon sampling. Another probable cause of misclassifications in the past is the partially low overall fit of phenotypic characters to the sequence-based tree. Even though a significant degree of phylogenetic conservation was detected in all characters investigated, the overall fit to the tree varied considerably.
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Affiliation(s)
- Anton Hördt
- Department of Bioinformatics, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
| | - Marina García López
- Department of Bioinformatics, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
| | - Jan P. Meier-Kolthoff
- Department of Bioinformatics, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
| | - Marcel Schleuning
- Department of Bioinformatics, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
| | - Lisa-Maria Weinhold
- Department of Bioinformatics, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - Brian J. Tindall
- Department of Microorganisms, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
| | - Sabine Gronow
- Department of Microorganisms, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
| | - Nikos C. Kyrpides
- Department of Energy, Joint Genome Institute, Berkeley, CA, United States
| | - Tanja Woyke
- Department of Energy, Joint Genome Institute, Berkeley, CA, United States
| | - Markus Göker
- Department of Bioinformatics, Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Brunswick, Germany
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Complete Genome Sequence of the Plant Growth-Promoting Bacterium Hartmannibacter diazotrophicus Strain E19 T. Int J Genomics 2019; 2019:7586430. [PMID: 31583244 PMCID: PMC6754898 DOI: 10.1155/2019/7586430] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 08/05/2019] [Accepted: 08/13/2019] [Indexed: 11/17/2022] Open
Abstract
Strain E19T described as Hartmannibacter diazotrophicus gen. nov. sp. nov. was isolated from the rhizosphere of Plantago winteri from a natural salt meadow in a nature protection area. Strain E19T is a plant growth-promoting rhizobacterium able to colonize the rhizosphere of barley and to promote its growth only under salt stress conditions. To gain insights into the genetic bases of plant growth promotion and its lifestyle at the rhizosphere under salty conditions, we determined the complete genome sequence using two complementary sequencing platforms (Ilumina MiSeq and PacBio RSII). The E19T genome comprises one circular chromosome and one plasmid containing several genes involved in salt adaptation and genes related to plant growth-promoting traits under salt stress. Based on previous experiments, ACC deaminase activity was identified as a main mechanism of E19T to promote plant growth under salt stress. Interestingly, no genes classically reported to encode for ACC deaminase activity are present. In general, the E19T genome provides information to confirm, discover, and better understand many of its previously evaluated traits involved in plant growth promotion under salt stress. Furthermore, the complete E19T genome sequence helps to define its previously reported unclear 16S rRNA gene-based phylogenetic affiliation. Hartmannibacter forms a distinct subcluster with genera Methylobrevis, Pleomorphomonas, Oharaeibacter, and Mongoliimonas subclustered with genera belonging to Rhizobiales.
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Moretti G, Matteucci F, Saraullo M, Vegliò F, Del Gallo M. Selection of a Very Active Microbial Community for the Coupled Treatment of Tetramethylammonium Hydroxide and Photoresist in Aqueous Solutions. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 15:ijerph15010041. [PMID: 29280962 PMCID: PMC5800140 DOI: 10.3390/ijerph15010041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/20/2017] [Accepted: 12/21/2017] [Indexed: 12/04/2022]
Abstract
Aerobic treatment of wastewater containing Tetramethylammonium hydroxide (TMAH) and photoresist was investigated using a lab scale reactor inoculated with activated sludge coming from urban wastewater treatment that never received TMAH before. The consumption of TMAH was monitored by liquid ion chromatography. Biodiversity indices were calculated from Denaturing Gradient Gel Electrophoresis (DGGE) bands distribution and used to estimate changes in community composition related to adaptation to the new feeding compound. The first week of adaptation was crucial, and it was analyzed in detail: many organisms died, and the microbial community suffered a great shock. TMAH levels remained constant through the first four days, and then suddenly dropped to undetectable, and at the same time NH4+ increased. When the community showed complete adaptation, predominant groups of bacteria were obtained by the Illumina sequencing of 16s rDNA amplicons, to provide insights on ecology of the adapted community, focusing on the main actors of TMAH abatement. Richness of species (Rr) peaks suggest that the development of TMAH-consuming bacteria leads to persistent consortia that maintain toxicity resistance over time. This showed adaptation and changes of the population to the different feeding conditions, and it opens new perspectives in the in situ treatment of these important residues of industrial processes without relying on external processing plants.
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Affiliation(s)
- Giulio Moretti
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Federica Matteucci
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Matteo Saraullo
- Department of Industrial and Information Engineering and Economics, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Francesco Vegliò
- Department of Industrial and Information Engineering and Economics, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Maddalena Del Gallo
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
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Choi G, Gao M, Lee DS, Choi H. Mabikibacter ruber gen. nov., sp. nov., a bacterium isolated from marine sediment, and proposal of Mabikibacteraceae fam. nov. in the class Alphaproteobacteria. Int J Syst Evol Microbiol 2017; 67:3375-3380. [DOI: 10.1099/ijsem.0.002121] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Grace Choi
- Department of Applied Research, Marine Biotechnology Research Division, 75, Jangsan-ro 101beon-gil, Janghang-eup, Seocheon-gun, Chungcheongnam-do, 33662, Republic of Korea
| | - Ming Gao
- College of Pharmacy, Yeungnam University, 280 daehak-ro, Gyeongsan-si, Gyeongsangbuk-do 38541, Republic of Korea
| | - Dae-Sung Lee
- Department of Applied Research, Marine Biotechnology Research Division, 75, Jangsan-ro 101beon-gil, Janghang-eup, Seocheon-gun, Chungcheongnam-do, 33662, Republic of Korea
| | - Hyukjae Choi
- College of Pharmacy, Yeungnam University, 280 daehak-ro, Gyeongsan-si, Gyeongsangbuk-do 38541, Republic of Korea
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Xi J, Wang Y, Yang X, Tao Y, Shao Y, Feng F. Mongoliimonas terrestris gen. nov., sp. nov., isolated from desert soil. Int J Syst Evol Microbiol 2017; 67:3010-3014. [PMID: 28820127 DOI: 10.1099/ijsem.0.002067] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, non-motile, aerobic, non-spore-forming, spherical bacterium (strain MIMtkB18T) was isolated from desert soil collected from part of a Mongolian Plateau, territory of Inner Mongolia, PR China. Cell growth could be observed at 20-45 °C (optimum at 40 °C), at a pH of 6-9 (optimum at pH 8.6) and in the presence of 0-1 % (w/v) NaCl (optimum 0 %). The genomic DNA G+C content was 69.6 mol%. 16S rRNA gene sequence analysis showed that strain MIMtkB18T was most closely related to Methylobrevis pamukkalensis PK2T (94.1 %), species of the genus Pleomorphomonas(93.4-94.0 %), and Hartmannibacter diazotrophicus E19T (93.9 %). The sole respiratory quinone was Q-10. The major fatty acids (>5 %) were C18 : 0 (5.7 %) and summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c) (81.6 %). Polar lipids were mainly composed of phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, phosphatidylmonomethylethanolamine and unidentified phospholipids. Based on phenotypic, chemotaxonomic and phylogenetic characteristics, it is concluded that strain MIMtkB18T represents a novel genus and species, for which the name Mongoliimonas terrestris sp. nov. is proposed. The type strain is MIMtkB18T (=KCTC 42635T=MCCC 1K00571T).
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Affiliation(s)
- Jiao Xi
- Institute for Applied and Environmental Microbiology, College of Life Science, Inner Mongolia Agricultural University, Huhhot 010018, PR China
| | - Yu Wang
- Institute for Applied and Environmental Microbiology, College of Life Science, Inner Mongolia Agricultural University, Huhhot 010018, PR China
| | - Xiaorong Yang
- Institute for Applied and Environmental Microbiology, College of Life Science, Inner Mongolia Agricultural University, Huhhot 010018, PR China
| | - Yu Tao
- Institute for Applied and Environmental Microbiology, College of Life Science, Inner Mongolia Agricultural University, Huhhot 010018, PR China
| | - Yufang Shao
- Institute for Applied and Environmental Microbiology, College of Life Science, Inner Mongolia Agricultural University, Huhhot 010018, PR China
| | - Fuying Feng
- Institute for Applied and Environmental Microbiology, College of Life Science, Inner Mongolia Agricultural University, Huhhot 010018, PR China
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Lv H, Masuda S, Fujitani Y, Sahin N, Tani A. Oharaeibacter diazotrophicus gen. nov., sp. nov., a diazotrophic and facultatively methylotrophic bacterium, isolated from rice rhizosphere. Int J Syst Evol Microbiol 2017; 67:576-582. [PMID: 27902265 DOI: 10.1099/ijsem.0.001660] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel facultatively methanol-utilizing bacterial strain, SM30T, was isolated from rice rhizosphere. Strain SM30T was Gram-stain-negative, aerobic, motile, short rods, and grew optimally at pH 7 and at 28 °C. It could tolerate 0 to 2 % (w/v) NaCl. Based on 16S rRNA gene sequence comparisons, strain SM30T was most closely related to Pleomorphomonas oryzae DSM 16300T, with a low similarity of 94.17 %. One of the lanthanide metals, lanthanum, could enhance its growth slightly on methanol. Phylogenetic trees, based on the mxaF, xoxF and cpn60 genes of SM30T showed its distinct phylogenetic position with respect to species with validly published names. Polymerase chain reaction (PCR) amplification of the nifH and growth on nitrogen-free medium indicated that strain SM30T is a diazotroph. The major cellular fatty acids were summed feature 8 (containing 18 : 1ω7c and 18 : 1ω6c) and cyclo 19 : 0ω8c. The major quinone was ubiquinone 10. The DNA G+C content was 74.6 mol%. Based on the genotypic and phenotypic characteristics, strain SM30T represents a novel genus and species, for which the name Oharaeibacter diazotrophicus gen. nov., sp. nov. is proposed with the type strain SM30T (=NBRC 111955T=DSM 102969T).
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Affiliation(s)
- Haoxin Lv
- Institute of Plant Science and Resources, Okayama University, Okayama, Japan
| | - Sachiko Masuda
- Institute of Plant Science and Resources, Okayama University, Okayama, Japan.,Advanced Low Carbon Technology Research and Development Program, Japan Science and Technology Agency, Tokyo, Japan
| | - Yoshiko Fujitani
- Institute of Plant Science and Resources, Okayama University, Okayama, Japan
| | - Nurettin Sahin
- Egitim Fakultesi, Mugla Sitki Kocman University, 48170 Kotekli, Mugla, Turkey
| | - Akio Tani
- Institute of Plant Science and Resources, Okayama University, Okayama, Japan
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