Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 65, Issue -, Pages 2154-2160Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.000235
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Funding
- National Natural Science Foundation of China [81102806, 31200008, 31400009]
- Hundred Talents Program of Chinese Academy of Sciences
- High-level Talents Program of Xinjiang Autonomous Region
- West Light Foundation of Chinese Academy of Sciences
- Deanship of Scientific Research at King Saud University [RGP-205]
- Guangdong Province Higher Vocational Colleges & Schools Pearl River Scholar Funded Scheme
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A Gram-staining-positive, white-coloured, aerobic, non-motile, catalase-positive and oxidase-negative, endophytic actinobacterium, designated strain EGI 6500322(T), was isolated from the surface-sterilized root of the halophyte Salsola affinis C. A. Mey collected from Urumqi, Xinjiang province, north-west China. Growth occurred at 5-35 degrees C (optimum 25-30 degrees C), at pH 5-10 (optimum pH 7-8) and with 0-13% NaCl (w/v) (optimum 0-5%). The predominant menaquinone was MK-9 (93.1%). The major cellular fatty acids were anteiso-C-15:0 (49.5%) and iso-C-(15:0) (15.1%). The cell-wall peptidoglycan contained lysine, alanine and glutamic acid. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, two unknown phospholipids and one unknown glycolipid. The DNA G+C content of strain EGI 6500322(T) was 62.0 mol%. Based on 16S rRNA gene sequence analysis, the nearest phylogenetic neighbours of strain EGI 6500322(T) were identified as Arthrobacter ardleyensis DSM 17432(T) (98.38%) and Arthrobacter bergerei DSM 16367(T) (98.37 %). The DNA-DNA relatedness between strain EGI 6500322(T) and Arthrobacter ardleyensis DSM 17432T and Arthrobacter bergerei DSM 16367(T) was 53.4 +/- 4.1% and 30.5 +/- 1.7%, respectively. On the basis of the phylogenetic analysis, chemotaxononnic data, physiological characteristics and DNA-DNA hybridization data, strain EGI 6500322(T) should represent a novel species of the genus Arthrobacter, for which the name Arthrobacter endophyticus sp. nov. is proposed. The type strain is EGI 6500322(T) (=KCTC 29490(T)=JCM 30091(T)).
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