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Streptomyces adelaidensis sp. nov., an actinobacterium isolated from the root of Callitris preissii with potential for plant growth-promoting properties

Archives of Microbiology volume 203, pages 3341–3352 (2021)Cite this article

Abstract

An endophytic actinobacterium, strain CAP261T was isolated from the surface sterilized root of Callitris preissii (Australian native pine tree). As a result of a polyphasic taxonomy study, this strain was identified as a member of the genus Streptomyces. This strain was an aerobic actinobacterium with well-developed substrate mycelia with loop spore chains and the spore surfaces are verrucose. The closest phylogenetic members which shared the highest 16S rRNA gene sequences similarity was Streptomyces bottropensis ATCC 25435 T at 98.1%. Chemotaxonomic data including cell wall components, major menaquinones, and major fatty acids confirmed the affiliation of strain CAP261T to the genus Streptomyces. The results of the phylogenetic analysis, including physiological and biochemical studies in combination with genome comparison study, allowed the genotypic and phenotypic differentiation of strain CAP261T and the closest species with validly published names. ANIb, ANIm and dDDH values of strain CAP261T and S. bottropensis ATCC 25435 T were 86.7%, 89.2% and 33.9%, respectively. The name proposed for the new species is Streptomyces adelaidensis sp. nov. The type strain is CAP261T (= DSM 42026 T = NRRL B-24814 T).

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Acknowledgements

The authors thank Greg Kirby for his assistance with a sampling of native plants, Daniel Jardine for menaquinone analysis, Lynnett Waterhouse at Adelaide Microscopy for SEM visualization and Max Aravena-Roman for performing the MIDI-FAME analysis.

Funding

This research project is financially supported by Mahasarakham University (Fast Track 2020; Grant number: 6307043) Mahasarakham University, Thailand.

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Affiliations

  1. Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham Province, 44150, Thailand

    Onuma Kaewkla

  2. Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Klong Luang, Pathumthani, 12120, Thailand

    Chanwit Suriyachadkun

  3. Department of Medical Biotechnology, College of Medicine and Public Health, Flinders University, Adelaide, Australia

    Onuma Kaewkla & Christopher Milton Mathew Franco

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  1. Onuma Kaewkla
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  3. Christopher Milton Mathew Franco
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Contributions

OK and CF planned the experiments. OK carried out the experimental work and prepared the draft manuscript. CF contributed to improving the manuscript and provided the facilities. CS extracted genomic DNA for genome sequencing purpose.

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Correspondence to Onuma Kaewkla.

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The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence and the draft genome of strain CAP261T are GU434247 and JAEMUX000000000, respectively.

A micrograph showing the spore morphology, an extended neighbor joining tree containing strain CAP261T and other 29 related valid species showing the positions of strain CAP261T, whole-cell fatty acid composition (%) of CAP261T and a related species of Streptomyces, and genome mining data are available as supplementary materials with the online version of this paper .

Communicated by Erko Stackebrandt.

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Kaewkla, O., Suriyachadkun, C. & Franco, C.M.M. Streptomyces adelaidensis sp. nov., an actinobacterium isolated from the root of Callitris preissii with potential for plant growth-promoting properties. Arch Microbiol 203, 3341–3352 (2021). https://doi.org/10.1007/s00203-021-02308-4

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Keywords

  • Streptomyces adelaidensis sp. nov.
  • Genome mining
  • Actinobacterium
  • Endophyte