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Microbacterium enclense sp. nov., isolated from sediment sample.

Rahul R Mawlankar1, Poonam Mual2, Vidya V Sonalkar1

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A new yellow-pigmented bacterium, Microbacterium enclense sp. nov. strain NIO-1002(T), was discovered in Indian marine sediments. This novel species expands the known diversity within the Microbacterium genus.

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Area of Science:

  • Microbiology
  • Bacteriology
  • Taxonomy

Background:

  • The genus Microbacterium comprises diverse bacteria found in various environments.
  • Isolation and characterization of novel bacterial species are crucial for understanding microbial diversity and ecological roles.

Purpose of the Study:

  • To isolate and characterize a novel bacterium from marine sediment.
  • To determine the taxonomic position of the novel isolate within the genus Microbacterium.

Main Methods:

  • Morphological, physiological, and biochemical characterization.
  • 16S rRNA gene sequencing and phylogenetic analysis.
  • DNA-DNA hybridization and chemotaxonomic analysis (fatty acids, cell-wall peptidoglycan).

Main Results:

  • Strain NIO-1002(T) is a Gram-positive, non-motile, non-spore-forming rod with yellow colonies.
  • Optimal growth occurs at 30 °C in 0-12% NaCl.
  • Phylogenetic analysis showed highest similarity to Microbacterium hominis (98.1%).
  • DNA-DNA hybridization values were below 70%, supporting novelty.
  • Major fatty acids and lysine in peptidoglycan were identified.

Conclusions:

  • Strain NIO-1002(T) represents a novel species within the genus Microbacterium.
  • The proposed name for the novel species is Microbacterium enclense sp. nov.
  • The type strain is NIO-1002(T) (= NCIM 5454(T) = DSM 25125(T) = CCTCC AB 2011120(T)).