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Updated: Aug 14, 2026

Adaptation at the Extremes of Life: Experimental Evolution with the Extremophile Archaeon Sulfolobus acidocaldarius
Published on: June 14, 2024
Genetic Adaptation to Elevated Carbon Dioxide Atmospheres by Pseudomonas-Like Bacteria Isolated from Rock Cod
1Institute of Marine Resources, University of California, Davis, California 95616.
Abstract:
The microorganisms on rock cod fillets stored in a modified atmosphere (MA; 80% CO(2)-20% air) at 4 degrees C for 21 days were isolated. Only Lactobacillus sp. (71 to 87%) and tan-colored Pseudomonas sp.-like isolates (TAN isolates) were found. The TAN isolates grew more slowly in MA than in air at 8 degrees C. When TAN isolates were grown in air at 8 degrees C and then transferred to MA at 8 degrees C, there was an initial decline in viable counts for 10 to 30 h followed by exponential growth. During this exponential growth phase in MA, the growth rates of the TAN isolates from MA-stored fish were significantly greater than those of the TAN isolates from fresh fish. When a TAN isolate from fresh fish was grown under MA for 21 days, it then grew as rapidly under MA as isolates from MA-stored fish. These results suggest that the TAN isolates genetically adapt to high levels of CO(2).
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