1887

Abstract

A Gram-negative, aerobic, rod-shaped bacterium, designated strain JA3-B52, was isolated from the roots of fresh rice plants (). The cells were motile by means of polar single or lateral flagella. The colonies were non-pigmented. On the basis of 16S rRNA gene sequence comparisons, the strain was phylogenetically related to species of the genus , having the greatest level of sequence similarity with respect to A62-14B (97.16 %). The bacterium grew at temperatures from 10 to 37 °C, with an optimum at 30 °C. The strain exhibited growth with 0–3.0 % (w/v) NaCl and at pH 6.0–8.5. The main cellular fatty acids were C 7, C 8, C , C 7 and C 3-OH. The DNA G+C content was 47.0 mol%. The levels of similarity between the 16S rRNA gene sequence of strain JA3-B52 and those of the type strains of species ranged from 95.38 to 97.16 %. The mean level of DNA–DNA relatedness between strain JA3-B52 and A62-14B, the strain most closely related to the isolate, was 20.4 %. On the basis of physiological and biochemical characteristics and genotypic data obtained in this work, strain JA3-B52 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is JA3-B52 (=CGMCC 1.6362 =DSM 19460).

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2008-10-01
2024-03-29
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