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<b>Abstract</b>— <p>Strain GrWVr-12 was isolated from a groundwater sample (Voskresensk District, Moscow oblast) and characterized. It was identified by 16S rRNA gene sequencing as a member of the genus <i>Janthinobacterium</i>, most phylogenetically related to the species <i>J. svalbardensis</i>. The strain produces a blue-violet pigment, presumably violacein. Disk diffusion assay demonstrated pronounced antibacterial and antifungal activity of the strain’s culture liquid against a wide range of test cultures of both gram-positive and gram-negative bacteria, as well as of phytopathogenic fungi. The antimicrobial activity and antagonistic properties of a new isolate, strain GrWVr-12, against various model <i>E. coli</i> strains were discovered and characterized. These data suggest that <i>Janthinobacterium</i> sp. GrWVr-12 is a promising source of natural broad-spectrum antimicrobial compounds.</p>

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The Ability of Janthinobacterium sp. GrWVr-12 from Groundwater to Suppress the Growth of Coli Group Bacteria

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • Y. A. Perov,
  • N. E. Suzina,
  • T. N. Abashina

摘要

Abstract—

Strain GrWVr-12 was isolated from a groundwater sample (Voskresensk District, Moscow oblast) and characterized. It was identified by 16S rRNA gene sequencing as a member of the genus Janthinobacterium, most phylogenetically related to the species J. svalbardensis. The strain produces a blue-violet pigment, presumably violacein. Disk diffusion assay demonstrated pronounced antibacterial and antifungal activity of the strain’s culture liquid against a wide range of test cultures of both gram-positive and gram-negative bacteria, as well as of phytopathogenic fungi. The antimicrobial activity and antagonistic properties of a new isolate, strain GrWVr-12, against various model E. coli strains were discovered and characterized. These data suggest that Janthinobacterium sp. GrWVr-12 is a promising source of natural broad-spectrum antimicrobial compounds.