The intensity of seeds luminescence induced by γ radiation and its decay speed both decrease gradually after the seed have been irradiated.The decay rule of the luminescence intensity follow nearly the second order reaction dynamics rule. The perseed luminescence induced by perdose correlate significantly with the seedling relative height,and the perseed or pergram seed luminescence at the soaking begining time correlate extremely significantly or significantly with the seedling relative height,these suggest that the higher radiosesitivity of the seed the higher intensity of seed luminescence induced by γ radiation. After germinating，the luminescence intensity of the irradiated seed is lower than that of the no-irradiated seed，this is because of the radianon inhibit the seedling growth.