1887

Abstract

Two Gram-stain positive, aerobic, short-rod-shaped, catalase-positive, oxidase-negative and non-motile strains, designated YIM 101343 and YIM 101645, were isolated from faeces of and respectively. The results of 16S rRNA gene analysis indicated that both represented members of the genus and they shared a similarity of 98.0 % with each other. DSM 44953 showed the highest similarity with both strains YIM 101343 (99.0 %) and YIM 101645 (97.3 %). The results of phylogenetic analysis based on 16S rRNA gene indicated that strain YIM 101343 formed a cluster with DSM 44953 and 2019, strain YIM 101645 formed a cluster with YIM 70093, and the two clusters were neighbours. The genomic size of strain YIM 101343 was 3068751 bp and that of strain YIM 101645 was 3169714 bp. The dDDH, ANI and AAI values among strains YIM 101343, YIM 101645 and the closely related species indicated that the two isolates represented two different novel species Both strains contained -diaminopimelic acid and short-chain mycolic acids, and the major menaquinones were MK-9(H) and MK-8(H). The major polar lipids of the two strains were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannoside. The major fatty acids (>10 %) of both strains were C, summed feature 4 and Cω9, but C 8 was only present as a major component in YIM 101645 In addition, phenotypic and some chemotaxonomic characteristics of strains YIM 101343, YIM 101645 and the closely related species were different. Thus, strains YIM 101343 and YIM 101645 should represent two novel species of the genus , for which the names sp. nov. and sp. nov. are proposed, respectively. The type strains are YIM 101343 (=DSM 45970=CCTCC AB 2013221) and YIM 101645 (=BCRC 16963=CCTCC AB 2013281=KCTC 39868).

Funding
This study was supported by the:
  • Ten Thousand Talent Plans for Young Top-notch Talents of Yunnan Province (Award YNWR-QNBJ-2018-085)
    • Principle Award Recipient: ChenXiu
  • Scientific Research and Technology Development Program of Guangxi (Award AA18242026)
    • Principle Award Recipient: ChenXiu
  • National Natural Science Foundation of China-Yunnan Joint Fund (Award 32060001)
    • Principle Award Recipient: ChenXiu
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2023-08-03
2024-06-15
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