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  • Title: Burkholderia diazotrophica sp. nov., isolated from root nodules of Mimosa spp.
    Author: Sheu SY, Chou JH, Bontemps C, Elliott GN, Gross E, Dos Reis Junior FB, Melkonian R, Moulin L, James EK, Sprent JI, Young JPW, Chen WM.
    Journal: Int J Syst Evol Microbiol; 2013 Feb; 63(Pt 2):435-441. PubMed ID: 22467155.
    Abstract:
    Five strains, JPY461(T), JPY359, JPY389, DPU-3 and STM4206 were isolated from nitrogen-fixing nodules on the roots of Mimosa spp. and their taxonomic positions were investigated using a polyphasic approach. All five strains grew at 15-40 °C (optimum, 30-37 °C), at pH 4.0-8.0 (optimum, pH 6.0-7.0) and with 0-1 % (w/v) NaCl [optimum, 0 % (w/v)]. On the basis of 16S rRNA gene sequence analysis, a representative strain (JPY461(T)) showed 97.2 % sequence similarity to the closest related species Burkholderia acidipaludis SA33(T), a similarity of 97.2 % to Burkholderia terrae KMY02(T), 97.1 % to Burkholderia phymatum STM815(T) and 97.1 % to Burkholderia hospita LMG 20598(T). The predominant fatty acids of the five novel strains were summed feature 2 (comprising C(16 : 1) iso I and/or C(14 : 0) 3-OH), summed feature 3 (comprising C(16 : 1)ω7c and/or C(16 : 1)ω6c), C(16 : 0) , C(16 : 0) 3-OH, C(17 : 0) cyclo, C(18 : 1)ω7c and C(19 : 0) cyclo ω8c. The major isoprenoid quinone was Q-8 and the DNA G+C content of the strains was 63.0-65.0 mol%. The polar lipid profile consisted of a mixture of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, an unidentified aminophospholipid, an unidentified aminolipid and several unidentified phospholipids. The DNA-DNA relatedness of the novel strain with respect to recognized species of the genus Burkholderia was less than 54 %. On the basis of 16S rRNA and recA gene sequence similarities, chemotaxonomic and phenotypic data, the five strains represent a novel species in the genus Burkholderia, for which the name Burkholderia diazotrophica sp. nov. is proposed with the type strain, JPY461(T) ( = LMG 26031(T) = BCRC 80259(T) = KCTC 23308(T)).
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