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Leuconostoc mesenteroides subsp. suionicum subsp. nov.

Chun Tao Gu¹, Fang Wang^2,3, Chun Yan Li¹

¹Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, PR China.

International Journal of Systematic and Evolutionary Microbiology

|August 23, 2011

Summary

This summary is machine-generated.

Two Leuconostoc mesenteroides strains were reclassified using a polyphasic approach. These strains represent a novel subspecies, Leuconostoc mesenteroides subsp. suionicum subsp. nov., distinct from existing L. mesenteroides subspecies.

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Area of Science:

Microbiology
Bacteriology
Systematics

Background:

Accurate bacterial classification is crucial for understanding microbial ecology and function.
Leuconostoc mesenteroides is a species with several recognized subspecies.
The taxonomic status of strains LMG 8159 and LMG 11499 required clarification.

Purpose of the Study:

To reclassify bacterial strains LMG 8159 and LMG 11499.
To determine the taxonomic relationship of these strains to Leuconostoc mesenteroides.
To propose a new subspecies if warranted by the data.

Main Methods:

Polyphasic taxonomic approach.
16S rRNA and 16S-23S rRNA intergenic spacer (IGS) gene sequence analysis.
(GTG)(5)-PCR and RAPD fingerprinting.
Fatty acid methyl ester analysis.
Phenotypic characterization using API 50 CH.

Main Results:

Strains LMG 8159 and LMG 11499 showed high 16S rRNA gene sequence similarity (99.7-99.9%) to Leuconostoc mesenteroides type strains.
Lower similarities in atpA gene sequences (91.4-91.7%) and distinct results from fingerprinting, fatty acid analysis, and phenotypic tests differentiated these strains.
These findings supported the distinction from established subspecies.

Conclusions:

Strains LMG 8159 and LMG 11499 are distinct from existing Leuconostoc mesenteroides subspecies.
A novel subspecies, Leuconostoc mesenteroides subsp. suionicum subsp. nov., is proposed.
Strain LMG 8159(T) is designated as the type strain for the new subspecies.