Phenylobacterium terrae sp. nov., isolated from a soil sample of Khyber-Pakhtun-Khwa, Pakistan

Abstract

A Gram-stain negative, aerobic, motile, non-spore-forming and rod-shaped bacterial strain, designated YIM 730227T, was isolated from a soil sample, collected from Karak district, Khyber-Pakhtun-Khwa, Pakistan. The bacterium was characterized using a polyphasic taxonomic approach. Pairwise comparison of the 16S rRNA gene sequences showed that strain YIM 730227T is closely related to Phenylobacterium lituiforme FaiI3T (97.5% sequence similarity), Phenylobacterium muchangponense A8T (97.4%), Phenylobacterium panacis DCY109T (97.1%), Phenylobacterium immobile ET (97.1%) and Phenylobacterium composti 4T-6T (97.0%), while also sharing 98.0% sequence similarity with Phenylobacterium hankyongense HKS-05T after NCBI blast, showing it represents a member of the family Caulobacteraceae. The major respiratory quinone was Q-10 and the major fatty acids were C16:0, summed feature 8 (comprising C18:1ω7c and/or C18:1ω6c), C18:1ω7c 11-methyl and C17:0. The polar lipids were phosphatidylglycerol, unidentified glycolipids, phospholipid and unidentified lipid. The G + C content of the genomic DNA was 68.2 mol%. The DNA–DNA relatedness values of strain YIM 730227T with P. hankyongense HKS-05T, P. lituiforme FaiI3T, P. muchangponense A8T, P. panacis DCY109T, P. immobile ET and P. composti 4T-6T were 31.3 ± 0.6, 26.1 ± 0.2, 24.3 ± 0.1, 21.8 ± 0.9, 19.8 ± 0.6 and 18.2 ± 1.1%, respectively, values lower than 70%. Besides the morphological and chemotaxonomic characteristics, phylogenetic analyses of 16S rRNA gene sequences and the biochemical characteristics indicated that the strain YIM 730227T represents a novel member of the genus Phenylobacterium, for which the name Phenylobacterium terrae sp. nov. (type strain YIM 730227T = KCTC62324T = CGMCC 1.16326T) is proposed.

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Acknowledgements

We are grateful to Dr Rüdiger Pukall (DSMZ, Germany) and Professor Jung-Sook Lee (KCTC, Korea) for kindly providing the reference type strains. This work was supported by Science and Technology Infrastructure work project of Ministry of Science & Technology (No. 2015FY110100) and National Natural Science Foundation of China (No. 31470139). W-J Li was also supported by Guangdong Province Higher Vocational Colleges & Schools Pearl River Scholar Funded Scheme (2014).

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Correspondence to Xiao-Yang Zhi or Wen-Jun Li.

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It is the original work of the authors. The work described has not been submitted elsewhere for publication, in whole or in part, and all authors listed carry out the data analysis and manuscript writing and ‘‘This article does not contain any studies with human participants or animals performed by any of the authors’’. Moreover, all authors read and approved the final manuscript.

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Khan, I.U., Habib, N., Xiao, M. et al. Phenylobacterium terrae sp. nov., isolated from a soil sample of Khyber-Pakhtun-Khwa, Pakistan. Antonie van Leeuwenhoek 111, 1767–1775 (2018). https://doi.org/10.1007/s10482-018-1064-2

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Keywords

  • Phenylobacterium terrae sp. nov.
  • A soil sample
  • Karak
  • Khyber-Pakhtun-Khwa
  • Pakistan
  • Polyphasic taxonomic approaches