Related Experiment Video
Updated: Aug 4, 2026

Extraction and Visualization of Protein Aggregates after Treatment of Escherichia coli with a Proteotoxic Stressor
Published on: June 29, 2021
Carotenoid accumulation in the psychrotrophic bacterium Arthrobacter agilis in response to thermal and salt stress
N J Fong1, M L Burgess, K D Barrow
1CRC for Food Industry Innovation, University of New South Wales, Sydney, Australia.
Abstract:
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.
More Related Videos
08:27Analysis of Effect of Compound Salt Stress on Seed Germination and Salt Tolerance Analysis of Pepper (Capsicum annuum L.)
Published on: November 30, 2022
05:13Estimation of Structural Sensitivity of Intrinsically Disordered Regions in Response to Hyperosmotic Stress in Living Cells Using FRET
Published on: January 12, 2024
Related Concept Videos
Responses to Heat and Cold Stress
Responses to Salt Stress
Other Stress Responses in Bacteria
Hyperthermophilic Bacteria
Diversity of Archaea III
Diversity of Archaea IV