1887

Abstract

A Gram-positive, aerobic, motile rod, designated strain CCBAU 05776, was isolated from the inner tissues of a healthy soybean ( L.) root collected from an agricultural field in the countryside of Shijiazhuang city, Hebei Province, China. Phylogenetic analysis of the 16S rRNA gene indicated that this strain was most closely related to LMG 20238 and NBRC 15720 with similarity of 96.5 % and 96.3 %, respectively, lower than the suggested threshold (97.0 %) for separating bacterial species. In phenotypic characterization, the novel strain differed from the two most related species in that it did not hydrolyse casein or starch but could grow on MacConkey agar. It grew between 15 and 45 °C and tolerated up to 7 % NaCl (w/v). Strain CCBAU 05776 grew in media with pH 5.5 to 10 (optimal growth at pH 7.0–8.0). The predominant cellular fatty acids were iso-C (40.81 %) and Cω7 alcohol (10.61 %). The predominant isoprenoid quinone was menaquinone 7 (MK-7). The cell-wall peptidoglycan contained -diaminopimelic acid. The major polar lipids were diphosphatidylglycerol and phosphatidylglycerol. The DNA GC was 40.8 mol% ( ). DNA–DNA relatedness of the novel isolate with and was 42.4 % and 32.7 %, respectively. Based upon the consensus of phylogenetic and phenotypic analyses, strain CCBAU 05776 represents a novel species within the genus , for which the name sp. nov. is proposed. The type strain is CCBAU 05776 ( = LMG 25492  = HAMBI 3097).

Funding
This study was supported by the:
  • , National Natural Science Foundation of China , (Award 30870004 and 30970004)
  • , Agricultural Scientific Achievement Transformation of Ministry of Science and Technology , (Award 2008GB23600460)
  • , Innovative Project of SKLAB , (Award 2009SKLAB05-1)
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2012-02-01
2020-10-22
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