Propionicimonas

Abstract

Pro.pio.ni.ci.mo'nas. N.L. n. acidum propionicum propionic acid; L. fem. n. monas a unit, monad; N.L. fem. n. Propionicimonas propionic acid‐producing monad. Actinobacteria / Actinobacteria / Propionibacteriales / Propionibacteriaceae / Propionicimonas Irregular , often slightly curved rods . Gram‐stain‐positive . Endospores are not produced. Nonmotile. Facultatively anaerobic . Chemo‐organotrophic . Negative for oxidase, catalase, and nitrate reduction. Mesophilic. In the presence of an excess amount of cobalamin , acetate and propionate are produced anaerobically as major fermentation products from glucose . Cell‐wall peptidoglycan contains meso ‐ diaminopimelic acid ( DAP ), and major cellular fatty acids are C 15 : 0 , C 15 : 0 anteiso, and C 15 : 0 . The major respiratory quinones are MK‐9 ( H 4 ) and MK‐10 ( H 4 ). Based on 16S rRNA gene sequences, species in the genera Micropruina , Microlunatus , and Friedmanniella in the Nocardioidaceae are the most closely related to those of Propionicimonas . Isolated from rice plant residue (straw and roots) in irrigated rice field soil in Japan. DNA G + C content ( mol %): 68.7 (HPLC). Type species : Propionicimonas paludicola Akasaka, Ueki, Hanada, Kamagata and Ueki 2003, 1996 VP .