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Volume 71, Issue 3

sp. nov., and sp. nov., isolated from oxidized rice paddy soil Free

Abstract

Three Gram-stain-negative, motile or non-motile, rod-shaped, facultatively aerobic strains, designated MO-4, NP-34 and NM-18, were isolated from oxidized rice paddy soil in Chungbuk, Republic of Korea. Colonies were circular and convex with entire margins, red in colour on R2A after 3 days at 30 °C. The three strains grew at pH 5.0–10.0 (optimum, pH 8.0), at 15–45 °C (optimum, 30 °C) and at salinities of 0–1.5 % (w/v) NaCl (optimum, 0.4 % NaCl). The results of phylogenetic analyses based on 16S rRNA gene sequences indicated that the three isolates represent members of the genus and strains MO-4 and NP-34 were most closely related to TH057 (97.7 %) and DSM 17366 (97.1 %). NM-18 showed highest 16S rRNA gene sequence similarities to DSM 17366 (98.7 %) and TH057 (96.7 %). Genomic similarities between strains MO-4 and NM-18 and the two type strains of species of the genus based on average nucleotide identity and digital DNA–DNA hybridization values were lower than the species delineation thresholds. The major fatty acids were iso-C ω7 and summed feature 3. The DNA G+C contents of strains MO-4 and NM-18, obtained from genome sequencing data, were 67.6 and 66.6 mol%, respectively. On the basis of these genotypic and phenotypic characteristics, the three strains are assigned to two novel species of the genus , for which the names sp. nov. (type strain MO-4 =KACC 21378=NBRC 114106) and sp. nov. (type strain NM-18=KACC 21379=NBRC 113957) are proposed.

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Keyword(s): phototroph , rice paddy soil , Sandarakinorhabdus oryzae sp. nov , Sandarakinorhabdus rubra sp. nov and taxonomy
© 2021 The Authors
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2021-02-25
2024-04-25
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Sandarakinorhabdus rubra sp. nov., and Sandarakinorhabdus oryzae sp. nov., isolated from oxidized rice paddy soil
Int J Syst Evol Microbiol 71, 004722 (2021); https://doi.org/10.1099/ijsem.0.004722
/content/journal/ijsem/10.1099/ijsem.0.004722
/content/journal/ijsem/10.1099/ijsem.0.004722
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