Pontibacter ummariensis sp. nov., isolated from a hexachlorocyclohexane-contaminated soil

Mahato, Nitish Kumar; Tripathi, Charu; Nayyar, Namita; Singh, Amit Kumar; Lal, Rup

doi:10.1099/ijsem.0.000840

Cited by 22 publications

(7 citation statements)

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“…Representatives of the genus Cellulomonas are often isolated from soil [69] with some of them known to be halotolerant species [70]. Bacteria of the genus Pontibacter have been previously isolated from arid soils [71,72].…”

Section: Discussionmentioning

confidence: 99%

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

et al. 2019

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The arid Mojave Desert is one of the most significant terrestrial analogue objects for astrobiological research due to its genesis, mineralogy, and climate. However, the knowledge of culturable bacterial communities found in this extreme ecotope’s soil is yet insufficient. Therefore, our research has been aimed to fulfil this lack of knowledge and improve the understanding of functioning of edaphic bacterial communities of the Central Mojave Desert soil. We characterized aerobic heterotrophic soil bacterial communities of the central region of the Mojave Desert. A high total number of prokaryotic cells and a high proportion of culturable forms in the soil studied were observed. Prevalence of Actinobacteria, Proteobacteria, and Firmicutes was discovered. The dominance of pigmented strains in culturable communities and high proportion of thermotolerant and pH-tolerant bacteria were detected. Resistance to a number of salts, including the ones found in Martian regolith, as well as antibiotic resistance, were also estimated.

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Section: Discussionmentioning

confidence: 99%

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

et al. 2019

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“…In an effort to characterize the culturable diversity of soil contaminated with HCH [12][13][14][15][16][17][18] , we isolated and characterized four novel members of the genus Devosia viz. D. chinhatensis IPL18 7 , D. crocina IPL20 8 , D. albogilva IPL15 8 and D. lucknowensis L15 19 .…”

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confidence: 99%

Defining the Environmental Adaptations of Genus Devosia: Insights into its Expansive Short Peptide Transport System and Positively Selected Genes

Talwar

Nagar

Kumar

et al. 2020

Sci Rep

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Devosia are well known for their dominance in soil habitats contaminated with various toxins and are best characterized for their bioremediation potential. In this study, we compared the genomes of 27 strains of Devosia with aim to understand their metabolic abilities. The analysis revealed their adaptive gene repertoire which was bared from 52% unique pan-gene content. A striking feature of all genomes was the abundance of oligo-and di-peptide permeases (oppABCDF and dppABCDF) with each genome harboring an average of 60.7 ± 19.1 and 36.5 ± 10.6 operon associated genes respectively. Apart from their primary role in nutrition, these permeases may help Devosia to sense environmental signals and in chemotaxis at stressed habitats. Through sequence similarity network analyses, we identified 29 Opp and 19 Dpp sequences that shared very little homology with any other sequence suggesting an expansive short peptidic transport system within Devosia. The substrate determining components of these permeases viz. OppA and DppA further displayed a large diversity that separated into 12 and 9 homologous clusters respectively in addition to large number of isolated nodes. We also dissected the genome scale positive evolution and found genes associated with growth (exopolyphosphatase, HesB_IscA_SufA family protein), detoxification (moeB, nifU-like domain protein, alpha/beta hydrolase), chemotaxis (cheB, luxR) and stress response (phoQ, uspA, luxR, sufE) were positively selected. The study highlights the genomic plasticity of the Devosia spp. for conferring adaptation, bioremediation and the potential to utilize a wide range of substrates. The widespread toxin-antitoxin loci and 'open' state of the pangenome provided evidence of plastic genomes and a much larger genetic repertoire of the genus which is yet uncovered.

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“…At the time of writing, the genus comprised 34 species with validly published names (www.bacterio.net/pontibacter.html). Those species were mainly isolated from soil environments, some of which were from hexachlorocyclohexane-contaminated environments [3–9], and some were from marine environments [1, 10–13]. In this paper, we present the results of the taxonomic study of a novel Pontibacter strain isolated from a mangrove sediment sample in Hainan, PR China.…”

Section: Full-textmentioning

confidence: 99%

Pontibacter mangrovi sp. nov., isolated from mangrove sediment

et al. 2020

International Journal of Systematic and Evolutionary Microbiology

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A Gram-stain-negative, short-rod-shaped and pink-pigmented bacterial strain (HB172049 T ) was isolated from mangrove sediment. Cells grew at 10-45 °C (optimum, 30 °C), pH 6.0-9.0 (optimum, pH 7.0) and with 0.5-9.0 % (w/v) NaCl (optimum, 2-5 %). Analysis of the 16S rRNA gene sequence revealed that the isolate had highest sequence similarities to Pontibacter mucosus DSM 100162 T (96.5 %) and Pontibacter korlensis X14-1 T (96.5 %). The values of average nucleotide identity, average amino acid identity and digital DNA-DNA hybridization between the isolate and its close neighbours were, respectively, less than 80.1, 81.7 and 23.2 %. Chemotaxonomic analysis indicated that the sole respiratory quinone was MK-7 and the predominant cellular fatty acids were summed feature 4 and iso-C 15 : 0 (42.2 and 24.6 %, respectively). The major polar lipids consisted of phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, one unidentified glycolipid, one unidentified phospholipid, one unidentified aminophospholipid and two unidentified polar lipids. The genomic DNA G+C content was 52.6 mol%. Based on polyphasic taxonomic characterization, it is proposed that strain HB172049 T belongs to the genus Pontibacter and represents a novel species, for which the name Pontibacter mangrovi sp. nov. is proposed. The type strain is HB172049 T (=CGMCC 1.16729 T =JCM 33333 T ).

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Pontibacter ummariensis sp. nov., isolated from a hexachlorocyclohexane-contaminated soil

Cited by 22 publications

References 50 publications

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

Defining the Environmental Adaptations of Genus Devosia: Insights into its Expansive Short Peptide Transport System and Positively Selected Genes

Pontibacter mangrovi sp. nov., isolated from mangrove sediment

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