Carotenoid accumulation in the psychrotrophic bacterium Arthrobacter agilis in response to thermal and salt stress

A psychrotrophic strain of Arthrobacter agilis, isolated from Antarctic sea ice, grows from 5 degrees C to 40 degrees C and in culture media containing 0-10% (w/v) NaCl. Maximum growth rate occurred at 30-35 degrees C with a drastic decline as the cultivation temperatures diverged. Adaptation to ext...

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Bibliographic Details
Published in:	Applied microbiology and biotechnology Vol. 56; no. 5/6; pp. 750 - 756
Main Authors:	Fong, N.J.C, Burgess, M.L, Barrow, K.D, Glenn, D.R
Format:	Journal Article
Language:	English
Published:	Berlin Springer 01-09-2001 Springer Nature B.V
Subjects:	Accumulation Antarctica Arthrobacter - drug effects Arthrobacter - growth & development Arthrobacter - metabolism Arthrobacter - physiology Arthrobacter agilis Bacteria Biological and medical sciences Biology of microorganisms of confirmed or potential industrial interest Biomass biomass production Biotechnology Brackish Carotenoids Carotenoids - chemistry Carotenoids - metabolism Cold Temperature Cultivation Culture Media Freshwater Fundamental and applied biological sciences. Psychology glycosylation ice Low temperature Miscellaneous Mission oriented research psychrotrophic bacteria Salinity salt stress Sea ice Sodium chloride Sodium Chloride - pharmacology Temperature Antarctic region PS, Antarctica Arthrobacter agilis Microorganism growth Adaptive response Environmental factor Stress Production Microorganism culture Bacteria Actinomycetes Psychrotrophy Carotenoid Low temperature Sodium Chlorides
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Summary:	A psychrotrophic strain of Arthrobacter agilis, isolated from Antarctic sea ice, grows from 5 degrees C to 40 degrees C and in culture media containing 0-10% (w/v) NaCl. Maximum growth rate occurred at 30-35 degrees C with a drastic decline as the cultivation temperatures diverged. Adaptation to extremes of low temperature may be partially attributed to the production of the C-50 carotenoid bacterioruberin, and its glycosylated derivatives. Lowering of the cultivation temperature resulted in a concomitant increase in carotenoid production, which may contribute to membrane stabilisation at low temperature. Maximum biomass accumulation occurred at 5-30 degrees C with a tenfold reduction at 40 degrees C. Changes in growth rates were minimal in culture media containing 0-2% (w/v) NaCl at 10 degrees C while a gradual decrease in growth rates occurred at higher salinity. Biomass accumulation at different salinity followed a trend similar to that observed with different cultivation temperatures. Maximum biomass accumulation was observed in culture media containing 0-5% (w/v) NaCl with a tenfold reduction at 10% (w/v) NaCl. Carotenoid production also decreased as salinity increased.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0175-7598 1432-0614
DOI:	10.1007/s002530100739