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Adaptive Prediction Emerges Over Short Evolutionary Time Scales.

Author
Abstract
:

Adaptive prediction is a capability of diverse organisms, including microbes, to sense a cue and prepare in advance to deal with a future environmental challenge. Here, we investigated the timeframe over which adaptive prediction emerges when an organism encounters an environment with novel structure. We subjected yeast to laboratory evolution in a novel environment with repetitive, coupled exposures to a neutral chemical cue (caffeine), followed by a sublethal dose of a toxin (5-FOA), with an interspersed requirement for uracil prototrophy to counter-select mutants that gained constitutive 5-FOA resistance. We demonstrate the remarkable ability of yeast to internalize a novel environmental pattern within 50-150 generations by adaptively predicting 5-FOA stress upon sensing caffeine. We also demonstrate how novel environmental structure can be internalized by coupling two unrelated response networks, such as the response to caffeine and signaling-mediated conditional peroxisomal localization of proteins.

Year of Publication
:
2017
Journal
:
Genome biology and evolution
Volume
:
9
Issue
:
6
Number of Pages
:
1616-1623
Date Published
:
2017
URL
:
https://academic.oup.com/gbe/article-lookup/doi/10.1093/gbe/evx116
DOI
:
10.1093/gbe/evx116
Short Title
:
Genome Biol Evol
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