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Volume 69, Issue 5

Trinickia dinghuensis sp. nov. and Trinickia fusca sp. nov., isolated from forest soil Free

Abstract

Two Gram-stain-negative, aerobic, non-spore forming and rod-shaped bacterial strains, designated DHOM06 and 7MK8-2, were isolated from forest soil sampled at Dinghushan Biosphere Reserve, Guangdong Province, PR China. Strain DHOM06 grew at 12–37 °C (optimum, 28–33 °C), pH 4.5–7.5 (pH 5.5) and in the presence of 0–0.5 % NaCl (w/v); while strain 7MK8-2 grew at 12–42 °C (28–33 °C), pH 4.0–8.5 (pH 4.5–5.5) and in the presence of 0–1.0 % NaCl (w/v). Strains DHOM06 and 7MK8-2 each has a 16S rRNA gene sequence similarity of 97.1–98.9 % as well as 97.4–97.9 % to Trinickia strains, respectively. In the 16S rRNA gene sequence phylogram, both strains and all five currently described Trinickia species formed a clade but they were all distinct from each other. The average nucleotide identity and digital DNA–DNA hybridization values for strains DHOM06 and 7MK8-2 and all Trinickia species were in the range of 77.4–82.6 % and 21.7–26.2 %, respectively. The DNA G+C content of DHOM06 and 7MK8-2 was 63.2 and 63.5 mol%, respectively, based on total genome calculations. These two strains contained ubiquinone 8 as the major respiratory quinone and C16 : 0, C17 : 0cyclo, C19 : 0cyclo ω8c, summed feature 3 (C16 : 1 ω7c/C16 : 1 ω6c) and summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c) as the major cellular fatty acids. The major polar lipids of DHOM06 and 7MK8-2 were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. On the basis of phenotypic, chemotaxonomic, phylogenetic and genomic analysis data, strains DHOM06 and 7MK8-2 represent two novel species of the genus Trinickia , for which the names Trinickia dinghuensis sp. nov. (type strain DHOM06=GDMCC 1.1280=LMG 30259) and Trinickia fusca sp. nov. (type strain 7MK8-2=GDMCC 1.1449=KCTC 62469) are proposed.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): phylogeny , proteobateria , taxonomy and Trinickia
© 2019 IUMS
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2019-02-28
2024-04-24
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Trinickia dinghuensis sp. nov. and Trinickia fusca sp. nov., isolated from forest soil
Int J Syst Evol Microbiol 69, 1390 (2019); https://doi.org/10.1099/ijsem.0.003324
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