Cedecea sulfonylureivorans sp. nov., a novel chlorimuron-ethyldegrading bacterium isolated from an...

A Gram-stain-negative, motile, rod-shaped bacterium, designated strain LAM2020^T, was isolated from a sulfonylurea herbicides-degrading bacterial consortium. The optimal temperature and pH for the growth of strain LAM2020^T were 30 °C and 7.0, respectively. Strain LAM2020^T formed a distinct phylogenetic subclade within the genus Cedecea in the phylogenetic trees built with 16S rRNA gene sequences and shared the highest similarity with Cedecea davisae DSM 4568^T (98.4%). The values of digital DNA-DNA hybridization and average nucleotide identity (ANI) based on the genome sequences between LAM2020^T and C. davisae DSM 4568^T were 22.7% and 80.0%, respectively. It contained 54.0 mol% of G + C in the genomic DNA. The major cellular fatty acids of strain LAM2020^T were summed feature 3 (C_16:1 ω6c and/or C_16:1 ω7c), C_16:0 and summed feature 8 (C_18:1 ω7c/C_18:1 ω6c). The major polar lipids present in strain LAM2020^T were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and aminophospholipid. The respiratory quinone of strain LAM2020^T was ubiquinone-8 and ubiquinone-7. Based on the phenotypic characteristics, chemotaxonomic data and genotypic analyses, strain LAM2020^T should be classified as a novel species of genus Cedecea, for which the name Cedecea sulfonylureivorans sp. nov. is proposed. The type strain is LAM2020^T (= GDMCC 1.2363^T = JCM 34640^T).