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Int J Syst Evol Microbiol 58 (2008), 1404-1408; DOI  10.1099/ijs.0.65716-0
© 2008 International Union of Microbiological Societies

Pseudomonas duriflava sp. nov., isolated from a desert soil

Rui Liu1,{dagger}, Huan Liu2,3,{dagger}, Hao Feng1, Xu Wang1, Chong-Xing Zhang1, Ke-Yun Zhang1 and Ren Lai1,2

1 Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Life Sciences College of Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
2 Biotoxin Department of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, PR China
3 Graduate School of the Chinese Academy of Sciences, Beijing 100009, China

Correspondence
Ren Lai
rlai72{at}njau.edu.cn

A Gram-negative, rod-shaped, non-motile, non-spore-forming bacterium, designated strain HR2T, was isolated from a soil sample from the Taklimaken Desert in Xinjiang Province, China. Strain HR2T grew optimally at pH 7.0–8.0 and 30–37 °C in the presence of 0–1 % (w/v) NaCl. An analysis of 16S rRNA gene sequences revealed that strain HR2T fell within the radiation of the genus Pseudomonas, the highest level of similarity being found with respect to Pseudomonas luteola IAM 13000T (97.5 %); the levels of sequence similarity with respect to other recognized Pseudomonas species were <96.4 %. DNA–DNA hybridization showed that the genetic relatedness between strain HR2T and P. luteola IAM 13000T was 53.2 %. The G+C content of the genomic DNA of strain HR2T was 55.2 mol%. The major fatty acids were 18 : 1, summed feature 3 and 16 : 0. The hydroxylated fatty acids 10 : 0 3-OH, 12 : 0 3-OH and 12 : 0 2-OH were also present. The data obtained in this polyphasic study indicated that this isolate represents a novel species of the genus Pseudomonas, for which the name Pseudomonas duriflava sp. nov. is proposed. The type strain is HR2T (=KCTC 22129T=CGMCC 1.6858T).

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain HR2T is EU046271.

Transmission electron micrographs of strain HR2T are available as supplementary material with the online version of this paper.






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