1887

Abstract

Four Gram-stain-negative, catalase- and oxidase-positive, rod-shaped and motile strains (Y26, Y57, ZJ14W and RP18W) were isolated from mariculture fishponds in PR China. Comparisons based on 16S rRNA gene sequences showed that strains Y26 and Y57 share 16S rRNA gene sequence similarities in the range of 95.1−98.5 % with species of the genus , and strains ZJ14W and RP18W share 16S rRNA gene sequence similarities in the range of 96.7 −98.8 % with species of the genus , respectively. The genome sizes of strains Y26, Y57, ZJ14W and RP18W were about 4.85, 5.40, 4.70 and 4.70 Mbp with 49.5, 51.7, 51.2 and 51.3 mol% G+C content, respectively. The calculated pairwise OrthoANIu values among strains Y26, Y57 and species of the genus were in the range of 72.6−83.1 %, but the value between strains Y26 and Y57 was 96.2 %. The pairwise OrthoANIu values among strains ZJ14W, RP18W and other species of the genus were all less than 93.9 %, but the value between strains ZJ14W and RP18W was 99.3 %. Q-8 was the major respiratory quinone of strains Y26, Y57, ZJ14W and RP18W, and the major fatty acids of these strains were all C ω7, C and C ω7. The predominant polar lipids of strains Y26 and Y57 included phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and phosphatidylinositol, but strains ZJ14W and RP18W only contained phosphatidylethanolamine and phosphatidylglycerol. Combining phenotypic, biochemical and genotypic characteristics, strains Y26 and Y57 should belong to the same species and represent a novel member of the genus , and strains ZJ14W and RP18W should belong to the same species and represent a novel member of the genus , for which the names sp. nov. (type strain Y57=GDMCC 1.2180=KCTC 82439) and sp. nov. (type strain ZJ14W=GDMCC 1.2203=KCTC 82438) are proposed.

Funding
This study was supported by the:
  • GDAS’ Special Project of Science and Technology Development (Award 2020GDASYL-20200103016; 2020GDASYL-20200402001)
    • Principle Award Recipient: MeiyingXu
  • Guangdong MEPP Fund (Award NO. GDOE(2019)A34)
    • Principle Award Recipient: MeiyingXu
  • Guangdong Provincial Programs for Science and Technology Development (Award 2020B0202080005; 2019B110205004)
    • Principle Award Recipient: MeiyingXu
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2021-08-05
2024-12-14
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