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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 75, Issue 4

Identification of four novel isolated from machair grassland soil using a culture-based bioprospecting strategy: sp. nov., sp. nov., sp. nov. and sp. nov. Open Access

Abstract

A culture-dependent bioprospecting strategy, based on the use of several selective isolation media, revealed the presence of relatively high numbers of streptomycete-like colonies from machair grassland soil, in which carbonate minerals dominate. Representatives were shown to be bioactive in primary and secondary antimicrobial screens conducted through standard plug assays. The comparison of the whole-genome sequences showed that four of the isolates were novel species in the genus , for which the names sp. nov. (=DSM 118365; =NCIMB 15554), sp. nov. (=DSM 118363; =NCIMB 15553), sp. nov. (=DSM 118364; =NCIMB 15555) and sp. nov. (=NCIMB 15556; =DSM 118366) are proposed. Genomes of the novel strains were found to be rich in biosynthetic gene clusters predicted to encode for diverse, specialized metabolites, notably antibiotics. They also contained stress-related genes that provided an insight into how streptomycetes cope with the prevailing conditions in machair grassland soils. It can be concluded that selective isolation and dereplication of streptomycetes from the unique machair habitat provides a practical way of isolating novel strains for ecological and biotechnological studies.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): machair grassland soil , novel Streptomyces species , specialized metabolites and taxonomic description
© 2025 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2025-04-27
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Identification of four novel Streptomyces isolated from machair grassland soil using a culture-based bioprospecting strategy: Streptomyces caledonius sp. nov., Streptomyces machairae sp. nov., Streptomyces pratisoli sp. nov. and Streptomyces achmelvichensis sp. nov.
Int J Syst Evol Microbiol 75, 006736 (2025); https://doi.org/10.1099/ijsem.0.006736
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