Agromonas

Abstract

Ag.ro.mon' as . Gr. n. agros a field; Gr. n. monas a unit, monad; M.L. fem. n. Agromonas field monad. Proteobacteria / Alphaproteobacteria / Rhizobiales / Bradyrhizobiaceae / Agromonas Bent , branched , and / or budding rods , usually 0 . 6–1 . 0 × 2–7 μ m , when grown in diluted nutrient broth ( NB / 100 ). Motile by a polar flagellum . Gram negative. Colonies are colorless to white. No spores or microcysts formed. Aerobic. Oligotrophic ; grows under conditions of low organic carbon supply (<1 mg/ml). Fixes N 2 under microaerobic conditions . Catalase and oxidase positive . Cellulose and starch are not hydrolyzed. Casein and gelatin are not hydrolyzed. Cellular fatty acids consist mainly of a straight‐chain unsaturated acid C 18:1 , with smaller amounts of C 16:0 and C 19:1 . Ubiquinone Q‐10 is present. Isolated from rice paddy soils. The mol % G + C of the DNA is : 65.1–66.0. Type species : Agromonas oligotrophica Ohta and Hattori 1985, 223 (Effective publication: Ohta and Hattori 1983, 43.)