Fig. 3
Light intensity is the primary signal decreasing the lifespan. a Lifespan of lite-1(ok530) mutants and b lite-1(xu7) and lite-1(ce314) under PD or NL conditions. c Lifespan of tax-2 mutants is reduced upon daily light exposure. d Lifespan of N2 worms is proportional to the intensity of white light received (permanent-day condition). e Relationship between light intensity and mean lifespan; the black dotted line represents a linear trendline of the series. f Lifespan of worms exposed to laboratory light versus worms kept in the dark. g Lifespan of worms scored and transferred in the dark under dim stereomicroscope light, versus worms scored and transferred under laboratory light. **P < 0.01 using Pearson’s coefficient
