Characterization of halotolerant Bicosoecida and Placididea (Stramenopila) that are distinct from marine forms, and the phylogenetic pattern of salinity preference in heterotrophic stramenopiles

Environmental Microbiology
Jong Soo Park, Alastair G B Simpson

Abstract

Recent culture-based studies demonstrate the distinctiveness of the microbial eukaryote biota of very hypersaline environments. In contrast, microscopy-based faunistic studies suggest that the biota of habitats of more moderate hypersalinity (60-150 per thousand) overlaps substantially with that of marine environments, but this has barely been studied with modern techniques. To investigate the diversity and salinity tolerance range of these organisms, eight cultures of heterotrophic stramenopiles were established from (or from nearby) moderately hypersaline locations. These isolates represent five independent groups; Groups A, B and C are bicosoecids; Groups D and E belong to Placididea. One isolate (Group A) is a strain of the widespread marine species Cafeteria roenbergensis, and cannot grow above 100 per thousand salinity. The other isolates - Groups B-E - can all grow at 150-175 per thousand salinities and are probably moderate halophiles. Groups B-E all represent previously unsequenced species or even genera, although Group B is the sister group of the borderline extreme halophile Halocafeteria. The high level of novelty en countered suggests that moderately hypersaline environments may harbour a heterotrophic stramenopile...Continue Reading

References

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Citations

Dec 3, 2011·Extremophiles : Life Under Extreme Conditions·Jong Soo Park
Oct 20, 2011·Extremophiles : Life Under Extreme Conditions·Alexandra StockThorsten Stoeck
Dec 5, 2014·Extremophiles : Life Under Extreme Conditions·Sabine FilkerThorsten Stoeck
Jul 24, 2015·Protist·Jong Soo Park, Alastair G B Simpson
Oct 21, 2014·Environmental Microbiology·Andreas OikonomouThorsten Stoeck
May 2, 2015·Current Opinion in Microbiology·Nina S AtanasovaDennis H Bamford
Feb 15, 2013·FEMS Microbiology Ecology·Xavier Triadó-Margarit, Emilio O Casamayor
Jul 13, 2016·Evolution; International Journal of Organic Evolution·T Fatima MitterboeckSarah J Adamowicz
Aug 20, 2016·European Journal of Protistology·Won Je Lee, Jong Soo Park
Feb 14, 2017·Microbes and Environments·Ryuji Kondo, Takahiko Okamura
Dec 22, 2017·The Journal of Eukaryotic Microbiology·Tommy Harding, Alastair G B Simpson
Oct 26, 2018·Frontiers in Microbiology·Natassa StefanidouMaria Moustaka-Gouni

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