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  • Title: Sphingomonas oryziterrae sp. nov. and Sphingomonas jinjuensis sp. nov. isolated from rhizosphere soil of rice (Oryza sativa L.).
    Author: Chung EJ, Jo EJ, Yoon HS, Song GC, Jeon CO, Chung YR.
    Journal: Int J Syst Evol Microbiol; 2011 Oct; 61(Pt 10):2389-2394. PubMed ID: 21057052.
    Abstract:
    Two Gram-reaction-negative, yellow-orange-pigmented, rod-shaped bacterial strains, designated YC6722(T) and YC6723(T), were isolated from rhizosphere soil samples collected from rice fields in Jinju, Korea. Strains YC6722(T) and YC6723(T) grew optimally at 25-30 °C and at pH 7.0-8.5. Phylogenetic analyses of 16S rRNA gene sequences showed that strain YC6722(T) was most closely related to Sphingomonas jaspsi TDMA-16(T) (96.6 % sequence similarity) and strain YC6723(T) was related most closely to Sphingomonas aquatilis JSS7(T) (96.9 %). The two strains contained ubiquinone-10 (Q-10) as the major respiratory quinone system and sym-homospermidine as the major polyamine. The G+C contents of the genomic DNA of strains YC6722(T) and YC6723(T) were 63.3 and 61.0 mol%, respectively. The major fatty acid was C(18 : 1)ω7c. The polar lipids detected in the two strains were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, sphingoglycolipid, phosphatidyldimethylethanolamine and other unknown lipids. On the basis of their phylogenetic positions, and their biochemical and phenotypic characteristics, strains YC6722(T) and YC6723(T) represent two novel species of the genus Sphingomonas, for which the names Sphingomonas oryziterrae sp. nov. ( = KCTC 22476(T)  = DSM 21455(T)) and Sphingomonas jinjuensis sp. nov. (KCTC 22477(T)  = DSM 21457(T)) are proposed.
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