Relationships between Arctic and Antarctic Shewanella strains evaluated by a polyphasic taxonomic approach

• Published in: Polar Biology
• Main Authors: Zeng, Yinxin, Zheng, Tianling, 郑天凌, Yu, Yong, Chen, Bo, He, Jianfeng
• Format: Article in Journal/Newspaper
• Language: English
• Published: SPRINGER 2010
• Subjects: Shewanella frigidimarina; Bipolar distribution; Polyphasic taxonomy; Antarctic; Arctic; Canada; Greenland; Prydz Bay; The Antarctic; Antarc*; Antarctica; canada basin; Greenland Sea; International Polar Year; IPY; Polar Biology
• Online Access: https://doi.org/10.1007/s00300-009-0730-2; http://dspace.xmu.edu.cn/handle/2288/10260

As a result of the recent application of DNA-based technologies to investigate bacterial diversity in the polar marine environment, bacterial strains sharing significant 16S rRNA gene sequence similarities were isolated from both the Arctic and the Antarctic sea waters. Three selected marine bacterial isolates (BSw20248, BSw20661 and BSw10166) from two Arctic regions (the Greenland Sea and Canada Basin) and from Antarctica (Prydz Bay) were studied to determine their evolutionary relationships and phylogenetic position using a polyphasic taxonomic approach, including phenotypic characterization and genotypic analyses. These bacterial isolates proved to belong to the same species and were identified as Shewanella frigidimarina. Differences in phenotypic properties observed among them revealed a diversity of ecotypes for adaptation to the changing ecological or geographical conditions. It provided the evidence that Shewanella frigidimarina has a bipolar, or even global, distribution in the marine environment. National Natural Science Foundation of China [40576002, 40676002, 40876097]; High-Tech Research and Development Program of China [2008AA09Z408]; Program for Changjiang Scholars and Innovative Research Team in University [40821063]; Science and Technology Committee of Shanghai, China [052307053]; China's Action Plan for the International Polar Year (IPY)