Journal of the Japanese Society for Horticultural Science
Online ISSN : 1880-358X
Print ISSN : 0013-7626
ISSN-L : 0013-7626
Morphological Investigations on the Tulip Plants Irradiated by Gamma Rays
I. Effects of the Time for Irradiation
Hisao MATSUBARA
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1975 Volume 43 Issue 4 Pages 430-442

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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:

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