Studies on the transplantation of the immature embryos in cereals. II. On the germiation of the transplanted embryos of wheat.

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1. By the Immature Embryo Transplanting Method, immature wheat embrycs were transplanted to the immature wheat or barley endosperms of different degree of dorrnancy, and then these ernbryos were matured on the endosperms. Germination tests were made with all these matured seeds, and the results were discussed. 2. Out of 760, the total number of transplanted embryos, 106(about 14%) germinated. In the combination of wheat emdryos and wheat endosperms, high percentage of germination (11-22%) was obtairied when either or both of embryos and endosperms were non-dormant, but it was very low (about 2%) when both were dormant. The germination percentage of proper embryos varied in accordance with the degree of dormancy of them. 3. As to the rapidity of germination, correlation coefflcient between the proper embryos and the transplanted ones showed possitive value. Among these coefficients, the value of those between the proper embryos of non-dormant and the transplanted ones of non-dormant were the highest. The coefficient between th, e proper embryos of non-dormant and the transplanted ones of dormant ranks next, the significance of this coefficient having been recognized by the aralysis of variance. This fact seems to show that non-dormant endosperms exert an accelerative influence upon the germination of transplanted dormant embryos.