Streptomyces boninensis sp. nov., isolated from soil from a limestone cave in the Ogasawara Islands

A new species of Streptomyces, named Streptomyces boninensis, has been identified from soil samples collected in a limestone cave within the UNESCO-listed Ogasawara Islands. This discovery was based on comprehensive morphological, chemical, and genomic analyses, including 16S rRNA gene sequencing and DNA-DNA relatedness studies. The strain K11-0400T exhibited unique characteristics such as mature spore chains with more than 20 spores per chain, distinct lipid profiles, and a genomic G+C content of 72 mol%. Phylogenetic analysis revealed that while it shared the highest sequence similarity (97.58%) with Streptomyces naganishii, its DNA-DNA relatedness value was below 70%, confirming its status as a novel species. This finding expands the diversity of the Streptomyces genus and contributes to our understanding of microbial ecosystems in remote, ecologically significant regions like the Ogasawara Islands.

Také, A., Inahashi, Y., Ōmura, S., Takahashi, Y., & Matsumoto, A. (2018). Streptomyces boninensis sp. nov., isolated from soil from a limestone cave in the Ogasawara Islands. International Journal of Systematic and Evolutionary Microbiology, 68(5), 1795–1799. https://doi.org/10.1099/ijsem.0.002753