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Int J Syst Evol Microbiol. 2014 Mar;64(Pt 3):882-6. doi: 10.1099/ijs.0.058412-0. Epub 2013 Nov 22.

Paenalcaligenes suwonensis sp. nov., isolated from spent mushroom compost.

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Agricultural Microbiology Division, National Academy of Agricultural Science, Rural Development Administration, Suwon, Republic of Korea.


A bacterial strain, ABC02-12(T), was isolated from spent mushroom compost, a waste product of button mushroom cultivation. Cells of the strain were Gram-stain-negative, catalase- and oxidase-positive, non-spore-forming, aerobic flagellated rods. Optimum growth occurred at 28 °C and pH 7.0. 16S rRNA gene sequence analysis showed that strain ABC02-12(T) shared the highest sequence similarities with Paenalcaligenes hominis CCUG 53761A(T) (96.0 %), Alcaligenes faecalis subsp. parafaecalis G(T) (95.7 %), Alcaligenes faecalis subsp. faecalis IAM 12369(T) (95.4 %) and Pusillimonas noertemannii BN9(T) (95.3 %). According to the phylogenetic tree, strain ABC02-12(T) formed a robust cluster with Paenalcaligenes hominis CCUG 53761A(T) and Paenalcaligenes hermetiae KBL009(T). The quinone system was ubiquinone Q-8 with minor amounts of Q-7. The major fatty acids (>5 % of total fatty acids) were C16 : 0, C16 : 1ω6c and/or C16 : 1ω7c (summed feature 3), C18 : 1ω7c and/or C18 : 1ω6c (summed feature 8), C17 : 0 cyclo, and iso-C16 : 1 I, C14 : 0 3-OH and/or an unknown fatty acid (summed feature 2). The polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and an unknown aminolipid. Putrescine was the principal polyamine, with small amounts of 2-hydroxyputrescine and cadaverine. On the basis of the evidence presented in this study, strain ABC02-12(T) is a representative of a novel species within the genus Paenalcaligenes, for which the name Paenalcaligenes suwonensis sp. nov. is proposed. The type strain is ABC02-12(T) ( = KACC 16537(T) = NBRC 108927(T)).

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