Rhizomicrobium palustre gen. nov., sp. nov., a facultatively anaerobic, fermentative stalked bacterium in the class Alphaproteobacteria isolated from rice plant roots

The Journal of General and Applied Microbiology
Atsuko UekiKatsuji Ueki

Abstract

Facultatively anaerobic bacterial strains (A48(T), RR25 and RR54) were isolated from roots of living rice plants in an irrigated rice-field in Japan. The three strains had identical 16S rRNA gene sequences and showed almost the same phenotypic properties examined. Cells of the strains were Gram-negative, non-spore-forming rods. Reproduction of cells was by binary fission as well as by budding. Cells occurred singly or in pairs arranged angularly. Some cells, including dividing cells, were motile with a single polar flagellum. Cells developed a polar prostheca (stalk) with a holdfast-like structure and the cell with the stalk budded a daughter cell. The strains were chemoorganotrophs and utilized various sugars as growth substrates. The strains fermentatively produced acetate and lactate as well as small amounts of ethanol and H(2) from the substrates. Growth temperature and pH ranges for growth were 15-40 degrees C and pH 5.5-7.3 with optimum growth at 30-35 degrees C and pH 6.8. NaCl concentration range for growth was 0-1.0% (wt/vol) with an optimum at 0% (wt/vol). Catalase and oxidase activities were not detected. The strains reduced Fe(III) to Fe(II) in the presence of glucose, while they did not reduce nitrate, fumarate, ma...Continue Reading

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Citations

Aug 31, 2010·International Journal of Systematic and Evolutionary Microbiology·Yumiko Kodama, Kazuya Watanabe
Sep 7, 2016·Microbes and Environments·Makoto MatsushitaHiroyuki Kimura
Apr 28, 2021·Environmental Science and Pollution Research International·Muhammad TayyabHua Zhang

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