Abstract
The present investigation was carried out in order to find out the effects of irradiation on the flower organ formation in tulip and to elucidate the mechanisms of the morphological changes anatomically.
The bulbs and plants of tulips at the various growing stages, from the early stage of the flower bud differentiation (July) to the late stage of appearance of flower bud (March) were irradiated with cobalt-60 gamma rays (Table 1, Fig. 1, 3). Dosages employed were 0.5, 1 and 3 krad at dose rates of 1.6×102 and 1.4×104 rad/hr (Table 2).
The results of the observation are as follows:
