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Updated: Jun 21, 2026

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Thalassospira xianhensis sp. nov., a polycyclic aromatic hydrocarbon-degrading marine bacterium
Baisuo Zhao1, Hui Wang1, Ruirui Li1
1Department of Environmental Science and Engineering, State Key Joint Laboratory on Environmental Simulation and Pollution Control, Tsinghua University, Beijing 100084, PR China.
Abstract:
A polycyclic aromatic hydrocarbon-degrading marine bacterium, designated strain P-4(T), was isolated from oil-polluted saline soil in Xianhe, Shangdong Province, China. Strain P-4(T) was Gram-negative-staining with curved to spiral rod-shaped cells and grew optimally with 3-6 % (w/v) NaCl and at 30 degrees C. The predominant fatty acids were C(18 : 1)omega7c (35.0 %), C(16 : 0) (25.0 %), C(16 : 1)omega7c (17.9 %), C(14 : 0) (6.2 %) and C(17 : 0) cyclo (5.2 %). The major respiratory quinone was Q-9 and the genomic DNA G+C content was 61.2+/-1.0 mol%. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain P-4(T) belonged to the genus Thalassospira of the class Alphaproteobacteria. DNA-DNA hybridization with Thalassospira xiamenensis DSM 17429(T) showed relatedness of 36.0 %, and lower values were obtained with respect to other Thalassospira species. Based on physiological and biochemical tests and 16S rRNA gene sequence analysis as well as DNA-DNA relatedness, strain P-4(T) should be placed in the genus Thalassospira within a novel species. The name Thalassospira xianhensis sp. nov. is proposed, with P-4(T) (=CGMCC 1.6849(T) =JCM 14850(T)) as the type strain.
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