Fig. 1

Daily light exposure decreases C. elegans lifespan. a Experimental setup for exposing worms to different photoperiods with the amount of light indicated in the white box and the amount of darkness indicated in the black box for each condition. b Lifespan of N2 worms and (c) of the JU361 wild isolate under the four different photoperiods. d Lifespan of N2 worms under PD or NL conditions with heat-inactivated bacteria as the source of food or, (e), antibiotic-lyzed bacteria as the source of food. f Lifespan of N2 worms kept in NL conditions after having been placed from D1 adult on plates previously exposed to PD or NL conditions. Worms were transferred every 1–2 days until the end of their lifespan