Leucobacter triazinivorans sp. nov., a s-triazine herbicide prometryn-degrading bacterium isolated from sludge.

A Gram-stain-positive, rod-shaped, non-motile bacterial strain, designated JW-1, was isolated from activated sludge collected from the outlet of an aeration tank in a prometryn-manufacturing plant, located in Binzhou City, Shandong province, PR China. Phylogenetic analysis, based on 16S rRNA gene sequences, indicated that strain JW-1 belongs to the genus Leucobacter and its closest neighbours are 'Leucobacter kyeonggiensis' F3-P9 (98.95 % similarity), Leucobacter celer subsp. astrifaciens CBX151 (98.62 %), Leucobacter celer subsp. celer NAL101 (98.53 %), Leucobacter chromiiresistens JG31 (97.86 %) and Leucobacter chironomi DSM 19883 (97.37 %). DNA-DNA hybridization values with the above strains were <55 %. The DNA G+C content of strain JW-1 was 72.6 mol%. The major fatty acids of strain JW-1 were iso-C16 : 0, anteiso-C15 : 0, anteiso-C17 : 0 and iso-C15 : 0. The predominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol and glycolipid. The predominant menaquinone was MK-11. The cell wall amino acids were 2,4-diaminobutyric acid, alanine, glutamic acid, glycine and threonine. Based on the molecular and chemotaxonomic data, as well as the physiological and biochemical characteristics, strain JW-1 is considered to represent a novel species of the genus Leucobacter, for which the name Leucobacter triazinivorans is proposed. The type strain is JW-1 (=DSM 105188=LMG 30083).