A 2024 study published in Molecular Biology and Evolution investigates the contrasting selective signatures of gene expression plasticity in yeast in response to the antifungal agent clotrimazole compared to common environmental stresses like heat and salt. The research, led by a team from the University of Toronto, analyzed how Saccharomyces cerevisiae adapts its gene expression, a form of phenotypic plasticity, when exposed to these different challenges.
The findings reveal that the evolutionary pressures shaping gene expression plasticity for coping with a toxic drug like clotrimazole are distinct from those for dealing with natural environmental fluctuations. The study employed experimental evolution and RNA sequencing to track changes over multiple generations, identifying specific genetic pathways and regulatory networks involved in each type of response.
This work contributes to the broader theoretical framework discussed in the 2021 volume Phenotypic Plasticity and Evolution, edited by David W. Pfennig, which explores how plasticity influences evolutionary trajectories. The research has implications for understanding fungal drug resistance and the fundamental mechanisms of evolutionary adaptation.
