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Updated: May 8, 2026

Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells
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Published on: January 21, 2016

Bacillus paraflexus sp. nov., isolated from compost.

Piyush Chandna1, Shanmugam Mayilraj2, Ramesh Chander Kuhad1

  • 1Lignocellulose Biotechnology Laboratory, Department of Microbiology, University of Delhi South Campus, New Delhi 110 021, India.

International Journal of Systematic and Evolutionary Microbiology
|August 31, 2013
PubMed
Summary

A novel aerobic bacterium, Bacillus paraflexus sp. nov., was identified from compost. This Gram-positive, endospore-forming organism expands the diversity of the Bacillus genus.

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Area of Science:

  • Microbiology
  • Bacterial Taxonomy
  • Environmental Microbiology

Background:

  • Compost environments harbor diverse microbial communities.
  • Accurate bacterial classification is crucial for understanding ecological roles and potential applications.

Purpose of the Study:

  • To isolate and taxonomically characterize a novel bacterium from compost.
  • To determine the phylogenetic and phenotypic distinctiveness of the isolate.

Main Methods:

  • Polyphasic taxonomic analysis including 16S rRNA gene sequencing.
  • Analysis of cellular fatty acids, cell wall composition, polar lipids, and DNA-DNA hybridization.
  • Determination of growth parameters (temperature, pH) and G+C content.

Main Results:

  • A Gram-positive, aerobic, endospore-forming bacterium (strain RC2(T)) was isolated.
  • 16S rRNA gene sequence analysis showed 98.1% similarity to Bacillus flexus.
  • DNA-DNA hybridization revealed 54.5% relatedness to B. flexus, supporting species-level distinction.
  • Phenotypic and genotypic data confirmed RC2(T) as a novel species, Bacillus paraflexus.

Conclusions:

  • Strain RC2(T) represents a new species, Bacillus paraflexus sp. nov.
  • This finding contributes to the taxonomic understanding of the Bacillus genus.
  • The characterized bacterium expands the known microbial diversity in compost ecosystems.