The present paper studied the effect of illumination on somatic plant regeneration with complete embryo and cotyledon of existing cotyledon petiole of tea plant under the illumination intensity of 500,1 500 lx and darkness. The results showed that embryoid appeared mostly on the cotyledon petiole and the protrusion of cotyledon blade. The appearance rate of cotyledon protrusion declined with the rise of illumination intensity. Embryoid differentiation rate of cotyledon was higher when cotyledon culture with protrusion was cultured under the illumination intensity of 500 lx. Embryodiod and adve...