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原文連結
論文資訊
- 類型：已發表論文
- 日期：2022-07-15
摘要
氣候 change is gradual, but it can also cause brief extreme heat waves that can exceed the upper thermal limit of any one organism. To study the 演化ary potential of upper thermal tolerance, we evolved the cold-adapted Antarctic bacterium Pseudoalteromonas haloplanktis to survive at 30°C, beyond its ancestral thermal limit. This high-temperature 適應 occurred rapidly and in multiple 族群s. It involved genomic changes that occurred in a highly parallel fashion and mitigated the effects of 蛋白質 misfolding. However, it also confronted a physiological limit, because 族群s failed to grow beyond 30°C. Our experiments aimed to facilitate 演化ary rescue by using a small organism with large 族群s living at temperatures several degrees below their upper thermal limit. Larger organisms with smaller 族群s and living a
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