Flavisolibacter nicotianae sp. nov., isolated from rhizosphere soil of Nicotiana tabacum L.
2019
A Gram-stain-negative, aerobic, non-motile and rod-shaped bacterium, designated strain X7XT, was isolated from a rhizosphere soil sample of Nicotiana tabacum L. collected from a tobacco factory located in Kunming, south-western China. The cells showed oxidase-positive and catalase-positive reactions. Growth occurred at 20–40 °C and pH 6.0–8.0, with optimal growth at 30 °C and pH 7.0. The predominant respiratory quinone was MK-7. The major fatty acids were identified as iso-C15 : 0, iso-C17 : 0 3OH and summed feature 3 (C16 : 1 ω7c and/or C16 : 1 ω6c). The cellular polar lipids contained phosphatidylethanolamine, an unidentified aminophospholipid, two unidentified glycolipids, four unidentified aminolipids and four unidentified lipids. The genomic DNA G+C content was 49.7 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain X7XT should be affiliated to the genus
Flavisolibacter
. Results from further analysis showed that strain X7XT had highest 16S rRNA gene sequence similarity to
Flavisolibacter metallilatus
TX0661T (96.4 %) and ‘
Flavisolibacter swuensis
’ SR2-4-2T (96.4 %), followed by other species of the genus
Flavisolibacter
. The polyphasic taxonomic characteristics indicated that strain X7XT represents a novel species of the genus
Flavisolibacter
, for which the name
Flavisolibacter
nicotianae sp. nov. (type strain X7XT=KCTC 62326T=CGMCC 16451T) is proposed.
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