Comamonas composti sp. nov., isolated from food waste compost

1 Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, Taiwan, ROC 2 Department of Marine Biotechnology, National Kaohsiung Marine University, Kaohsiung, Taiwan, ROC 3 Laboratory of Microbiology, Department of Seafood Science, National Kaohsiung Marine University, No. 142 Hai-Chuan Road, Nan-Tzu, Kaohsiung City 811, Taiwan, ROC Correspondence Wen-Ming Chen p62365{at}ms28.hinet.net A bacterial strain designated YY287 T , isolated from food waste compost, was investigated by polyphasic taxonomic approach. The cells were rod-shaped, Gram-negative, non-pigmented, non-spore-forming and non-fermentative. Phylogenetic analyses using the 16S rRNA gene sequence showed that the strain formed a monophyletic branch towards the periphery of the evolutionary radiation occupied by the genus Comamonas ; its closest neighbours were the type strains Comamonas testosteroni DSM 50244 T (96.5 %), Comamonas terrigena DSM 7099 T (95.4 %), Comamonas odontotermitis Dant 3-8 T (95.2 %) and Comamonas koreensis KCTC 12005 T (94.6 %). Strain YY287 T was clearly distinguished from all of these strains using phylogenetic analysis, DNA–DNA hybridization, fatty acid composition data and a range of physiological and biochemical characteristics. The major fatty acids were 16 : 0 (33 %), 18 : 1 7 c (13 %) and summed feature 3 (16 : 1 7 c and/or 15 : 0 iso 2-OH; 41 %). The DNA G+C content of the genomic DNA was 62.8 mol%. It is evident from the genotypic and phenotypic data that strain YY287 T represents a novel species in the genus Comamonas , for which the name Comamonas composti sp. nov. is proposed. The type strain is YY287 T (=BCRC 17659 T =LMG 24008 T ). The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Comamonas composti sp. nov. YY287 T is EF015884 . A phylogenetic tree based on 16S rRNA gene sequences and an antibiogram of strain YY287 T and type strains of other Comamonas species are available with the online version of this paper.