sp. nov., a mineral-weathering bacterium isolated from purplish paddy soil Free

Abstract

A novel type of mineral-weathering bacterium was isolated from purplish soils collected from Yanting (Sichuan, south-western China). Cells of strain 1007 were Gram-stain-negative and rod-shaped, motile and yellow-pigmented. The isolate was strictly aerobic, catalase- and oxidase-positive, and grew optimally at 28-30 °C and pH 6.0-7.0. The genomic DNA G+C content of strain 1007 was 67±0.7 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain 1007 belonged to the genus and was most closely related to IFO 15498 (97.3 %), IFO 15500 (97.2 %), KC7 (97.2 %) and JSS26 (97.0 %). This affiliation of strain 1007 to the genus was confirmed by the presence of Q-10 as the major ubiquinone, sphingoglycolipid, C 2-OH and by the absence of 3-hydroxy fatty acids. The major polyamine was homospermidine. The main cellular fatty acids included summed feature 8 (comprising Cω7 and/or Cω6) and C. Based on the low level of DNA–DNA relatedness (ranging from 26.1 % to 58.7 %) to these type strains of species of the genus and unique phenotypic characteristics, strain 1007 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 1007 ( = DSM 27244 = JCM 19201 = CCTCC AB 2013146).

Funding
This study was supported by the:
  • National Science Foundation of China (Award 41071173)
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2014-03-01
2024-03-28
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