Figure 1.

Variation in larval thermotolerance. The y-axis displays the percentage of third-instar larvae that survived to adulthood after control, pretreatment, heat shock and pretreatment plus heat shock treatments (C, PT, HS and PT+HS respectively on the x-axis). '#Hsp70s (Strain)' indicates Hsp70 copy numbers of the Hsp70^-, Hsp70^A-Ba-, Hsp70⁺and Hsp70^traIII strains, respectively. Symbols are means ± 1 standard error (SE). For HS and PT+HS treatments, orange symbols indicate heat shocks of 39°C and red symbols indicate heat shocks of 39.5°C. See the methods section for a full description of the treatments.