Characterization of Acetobacter pomorum KJY8 Isolated from Korean Traditional Vinegar

초록

Acetobacter sp. strains were isolated from traditional vinegar collected in Daegu city and Gyeongbuk province. The strain KJY8 showing a high acetic acid productivity was isolated and characterized by phenotypic, chemotaxonomic, and phylogenetic inference based on 16S rRNA sequence analysis. The chemotaxonomic and phylogenetic analyses revealed the isolate to be a strain of Acetobacter pomorum.. The isolate showed a G+C content of 60.8 mol%. It contained LL-diaminopimelic acid (LL-A(2)pm) as the cell wall amino acid and ubiquinone Q(9) (H6) as the major quinone. The predominant cellular fatty acids were C-18:1 w9c, w12t, and w7c. Strain KJY8 grew rapidly on glucose-yeast extract (GYC) agar and formed pale white colonies with smooth to rough surfaces. The optimum.cultivation conditions for acetic acid production by the KJY8 strain were 20 degrees C and pH 3.0, with an initial ethanol concentration of 9% (w/v) to produce an acetic acid concentration of 8% (w/v).

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