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  • Title: Pararobbsia silviterrae gen. nov., sp. nov., isolated from forest soil and reclassification of Burkholderia alpina as Pararobbsia alpina comb. nov.
    Author: Lin QH, Lv YY, Gao ZH, Qiu LH.
    Journal: Int J Syst Evol Microbiol; 2020 Feb; 70(2):1412-1420. PubMed ID: 31851603.
    Abstract:
    A novel Gram-stain-negative, aerobic, non-spore-forming, non-motile and rod-shaped bacterial strain, DHC34T, was isolated from forest soil of Dinghushan Biosphere Reserve, Guangdong Province, China (112° 31' E 23° 10' N). It grew optimally on R2A medium at 28 °C, at pH 6.0-7.0 and in the presence of 0-1 % (w/v) NaCl. Strain DHC34T was closely related to Burkholderia alpina LMG 28138T (98.5 % 16S rRNA gene sequence similarity). 16S rRNA gene sequence analysis showed that strain DHC34T formed a clade with B. alpina LMG 28138T, which is next to but branched deeply with Robbsia andropogonis ICMP 2807T. The phylogenetic relationships among these three strains were also supported with the phylogram based on concatenated partial gyrB, recA and trpB gene sequences. The phylogenomic tree generated with the UBCG tool showed that strains DHC34T and R. andropogonis ICMP 2807T were in a different clade. The DNA-DNA relatedness values between strain DHC34T and B. alpina LMG 28138T and R. andropogonis ICMP 2807T were much lower than 70 %. Strain DHC34T contained ubiquinone 8 as the major respiratory quinone. Its major fatty acids were C16 : 0, C17 : 0 cyclo and C19 : 0 cyclo ω8c. The DNA G+C content of strain DHC34T was 64.2 mol%. The major polar lipids were phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, three unidentified aminophospholipids, four unidentified phospholipids, one unidentified aminolipid and a polar lipid. The phenotypic, phylogenetic, genotypic and chemotaxonomic data showed that strain DHC34T represents a novel species of a new genus in the family Burkholderiaceae, for which the name Pararobbsia silviterrae gen. nov., sp. nov. is proposed. The type strain of Pararobbsia silviterrae is DHC34T (=KCTC 42628T=LMG 28845T). On the basis of the current data, Burkholderia alpina is renamed as Pararobbsia alpina comb. nov.
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