Abstract
Seedlings of Raphanus and Pharbitis treated with aurantia showed generally enlarged and thickend characters and when they grew up, about 61% of them were gigantic in size of stomata and pollen grains. Surely, 4 plants of Rhaphanus were determined to have doubled chromosomes not only in somatic cells, but also in P.M.C. (Fig. 1).
In addition to this experiment, the effect of aurantia on the growing root of Allium was investigated. And it was ascertained that the swelling of root tips and abnormal mitotic division were observed, same as in the case treated with colchicine (Fig. 2-3).
