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  • Title: Pseudomonas lopnurensis sp. nov., an endophytic bacterium isolated from Populus euphratica at the ancient Ugan river.
    Author: Mamtimin T, Anwar N, Abdurahman M, Kurban M, Rozahon M, Mamtimin H, Hamood B, Rahman E, Wu M.
    Journal: Antonie Van Leeuwenhoek; 2021 Apr; 114(4):399-410. PubMed ID: 33587227.
    Abstract:
    A Gram-stain negative, aerobic, rod-shaped, motile by a single polar flagellum, non-spore-forming bacterium, designated strain AL-54T, was isolated from the storage liquid in the stems of Populus euphratica tree at the ancient Ugan River in Xinjiang, PR China. Isolated AL-54T grew optimally at pH 7.0 and temperature 35 °C in the presence of 3% (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequence demonstrated that the isolate belonged to the genus Pseudomonas and was closely related to Pseudomonas songnenensis NEAU-ST5-5 T (97.6%), Pseudomonas zhaodongensis NEAU-ST5-21 T (97.5%), Pseudomonas alcaliphila AL15-21T (97.3%), Pseudomonas toyotomiensis HT-3T (97.3%), Pseudomonas oleovorans subsp. lubricantis RS1T (97.3%), Pseudomonas stutzeri ATCC 17588T (97.3%), Pseudomonas chengduensis CGMCC 2318T (97.2%), and Pseudomonas xanthomarina KMM 1447T (97.1%). Multilocus Sequences Analysis (MLSA) of strain AL-54T based on the three housekeeping genes, rpoB, rpoD and gyrB further confirmed the phylogenetic assignment of the isolates. The G+C content was 64.7 mol%. The DNA-DNA hybridization with P. songnenensis NEAU-ST5-5 T, P. zhaodongensis NEAU-ST5-21T, P. alcaliphila AL15-21T, P. toyotomiensis HT-3T, P. oleovorans subsp. lubricantis RS1T, P. stutzeri ATCC 17588T, P. chengduensis CGMCC 2318T and P. xanthomarina KMM 1447T revealed 44.0%, 44.7%, 60.1%, 48.7%, 49.1%, 60.1%, 58.9% and 60.2% relatedness respectively. The predominant quinone system is ubiquinone-9 (Q-9). The major components of the cellular fatty acids (>10%) were summed feature 8 (comprising C18:1 ω7c /C18:1 ω6c), summed feature 3 (comprising C16:1 ω7c /C16:1 ω6c) and C16:0. The detected major polar lipids were phosphatidylethanolamine (PE), phosphatidylglycerol (PG), diphosphatidylglycerol (DPG) and phosphatidylcholine (PC). On the basis of phenotypic data, chemotaxonomic and phylogenetic properties, strain AL-54T can consider as a novel species within the genus Pseudomonas, for which the name Pseudomonas lopnurensis sp. nov. is proposed. The type strain is AL-54T (= JCM 19136T = CCTCC AB 2013066T = NRRL B-59987T).
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