Injection of 1 2 mmol/L EGTA into the dark adapted photoreceptors which were soaked by physiological saline almost abolished the effect of the light adaptation Thus, we conclude that the illumination releases calcium from the organelles.

• 把1?2mmol/LEGTA注入到浸浴在生理盐水中的感光器后，2?5s前光闪造成的光适应现象消失。