Abstract
A novel strain of Planctomycetes, designated JC670T, was isolated from a high altitude (~ 2900 m above sea level) soil sample collected from Garhwal region in the Western Himalaya. Colonies of this strain were observed to be light pink coloured with spherical to oval shaped cells having crateriform structures distributed all over the cell surface. The cells divide by budding. Strain JC670T was found to grow well at pH 7.0 and pH 8.0 and to tolerate up to 2% NaCl (w/v). MK6 was the only respiratory quinone identified. The major fatty acids of strain JC670T were identified as C18:1ω9c, C18:0 and C16:0, and phosphatidylcholine, two unidentified phospholipids and six unidentified lipids are present as the polar lipids. The polyamines putrescine and sym-homospermidine were detected. Strain JC670T shows high 16S rRNA gene sequence identity (95.4%) with Paludisphaera borealis PX4T. The draft genome size of strain JC670T is 7.97 Mb, with G + C content of 70.4 mol%. Based on phylogenetic analyses with the sequences of ninety-two core genes, low dDDH value (20.6%), low gANI (76.8%) and low AAI (69.1%) results, differential chemotaxonomic and physiological properties, strain JC670T (= KCTC 72850T = NBRC 114339T) is recognised as the type strain of a new species of the genus Paludisphaera, for which we propose the name Paludisphaera soli sp. nov.
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Abbreviations
- NCBI:
-
National Center for Biotechnology Information
- ANI:
-
Average Nucleotide Index
- AAI:
-
Average Nucleotide Index
- dDDH:
-
Digital DNA-DNA Hybridization
- HPLC:
-
High-Pressure Liquid Chromatography
- KCTC:
-
Korean Collection for Type Cultures
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Acknowledgements
MS thanks CSIR, RK and KG thank the DBT, New Delhi and JU thanks TEQIP III for the award for research fellowships. Ramana thanks the Department of Biotechnology, Government of India for the award of Tata Innovation fellowship. Sasikala thanks UGC for Mid-Career Award. We thank the staff and the laboratory facilities provided by Centre for Interdisciplinary Studies of Mountain & Hill Environment, University of Delhi.
Funding
This work received grant specifically from Department of Biotechnology, Government of India. Financial support received from Council for Scientific and Industrial Research (CSIR), and AICTE, New Delhi is acknowledged. Infrastructure facilities funded by DST-FIST, UGC-SAP (DRS) and TEQIP, AICTE-RPS and MODROBS are acknowledged. The financial assistance of DST-PURSE Grant to MKP is gratefully acknowledged.
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RK and MS performed sample collection. RK, MS and KG isolated the strain and performed the initial cultivation, strain deposition and strain characterisation, KG performed the electron microscopic analysis and media optimisation, JU performed the genomic and phylogenetic analysis, SA performed and analysed the data for polyamines, RK, MS and KG wrote the manuscript, Ramana, Sasikala and MKP supervised the study and contributed to text preparation and revised the manuscript. All authors read and approved the final version of the manuscript.
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Kaushik, R., Sharma, M., Gaurav, K. et al. Paludisphaera soli sp. nov., a new member of the family Isosphaeraceae isolated from high altitude soil in the Western Himalaya. Antonie van Leeuwenhoek 113, 1663–1674 (2020). https://doi.org/10.1007/s10482-020-01471-w
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DOI: https://doi.org/10.1007/s10482-020-01471-w