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An unusual cyanobacterium from saline thermal waters with relatives from unexpected habitats

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Acknowledgment to reviewers 2008

Extremophiles : Volume 13, Issue 3, May 2009

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An unusual cyanobacterium from saline thermal waters with relatives from unexpected habitats

Content Provider	Springer Nature Link
Author	Banerjee, Meenakshi Everroad, R. Craig Castenholz, Richard W.
Copyright Year	2009
Abstract	Cyanobacteria that grow above seawater salinity at temperatures above 45°C have rarely been studied. Cyanobacteria of this type of thermo-halophilic extremophile were isolated from siliceous crusts at 40–45°C in a geothermal seawater lagoon in southwest Iceland. Iceland Clone 2e, a Leptolyngbya morphotype, was selected for further study. This culture grew only at 45–50°C, in medium ranging from 28 to 94 g L−1 TDS, It showed 3 doublings 24 h−1 under continuous illumination. This rate at 54°C was somewhat reduced, and death occurred at 58°C. A comparison of the 16S rDNA sequence with all others in the NCBI database revealed 2 related Leptolyngbya isolates from a Greenland hot spring (13–16 g L−1 TDS). Three other similar sequences were from Leptolyngbya isolates from dry, endolithic habitats in Yellowstone National Park. All 6 formed a phylogenetic clade, suggesting common ancestry. These strains shared many similarities to Iceland Clone 2e with respect to temperature and salinity ranges and optima. Two endolithic Leptolyngbya isolates, grown previously at 23°C in freshwater medium, grew well at 50°C but only in saline medium. This study shows that limited genotypic similarity may reveal some salient phenotypic similarities, even when the related cyanobacteria are from vastly different and remote habitats.
Starting Page	707
Ending Page	716
Page Count	10
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	13
Issue Number	4
e-ISSN	14334909
Language	English
Publisher	Springer Japan
Publisher Date	2009-06-20
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cyanobacteria Leptolyngbya Thermophile Halophile Endolith Iceland Greenland Yellowstone Ecology Biotechnology Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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