Genetic interaction between TPS1 and HSF1. Viability of the TPS1 hsf1Δ, tps1Δ hsf1Δ, and tps1-156 hsf1Δ strains rescued by pTet-HSF1 and exposed to 40 °C for 2 h. Viability measured before heat shock (30 °C, open bars) or after 2 h at 42 °C (gray bars). Tetracyclin, stress exposure in the absence (−) or presence (+) of tetracyclin. Trehalose, growth in YN Gal without (−) or with 1% trehalose (+). The data are represented as means ± S.D. of three independent biological replicates.