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A novel proterhodopsin bearing Flavobacterium species from an Antarctic saline lake

conference contribution
posted on 2023-05-23, 06:49 authored by Shi, Feng, Shane PowellShane Powell, John BowmanJohn Bowman
Numerous Flavobacterium species have been officially described from Antarctic samples, and with recent investigations more will likely be described [1]. All Antarctic Flavobacterium species show some level of cold adaptation and have enhanced osmotolerance relative to other members of Flavobacterium (Fig. 1). The overall pattern of the distribution of cold-adapted species within the Flavobacterium phylogenetic radiation suggests the emergence of cold adaptation has occurred multiple times within different ecosystems, however most species cluster together suggesting ecophysiological specialisation amongst related Flavobacterium species. Within the largest of these cold-adapted clades (Fig. 2) resides one so far undescribed strain, designated ACAM 123, most closely related to the species F. degerlachei and F. frigoris. ACAM 123 likely represents a novel species, based on accumulated data [2]. ACAM 123 is both salt-requiring and psychrophilic (tolerates up to 6% NaCl, optimal temperature for growth ~10°C). ACAM 123 forms slimy orange colonies and contains carotenoids but not flexirubin pigments. The strain is not motile (or only weakly so at best) and is also non-fermentative, proteolytic, moderately saccharolytic and able to perform assimilatory denitrification, via reduction of nitrate to ammonia.


Department of Environment and Energy (Cwth)


Publication title

Proceedings of Flavobacterium 2012




Tasmanian Institute of Agriculture (TIA)


Flavobacterium 2012

Place of publication

Turku, Finland

Event title

Flavobacterium 2012

Event Venue

Turku, Finland

Date of Event (Start Date)


Date of Event (End Date)


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Copyright 2012 The Authors - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from the copyright owner(s).

Repository Status

  • Restricted

Socio-economic Objectives

Biodiversity in Antarctic and Southern Ocean environments

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