GERMINATION OF DOUBLY DORMANT CHIONANTHUS VIRGINICUS SEEDS.

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  • 1 University of Delaware, Newark, DE 19717

Seeds of Chionanthus virginicus L. have a double dormancy associated with germination. Seeds are inhibited by a hard bony endocarp. Inhibition may also be due to the endosperm and possibly embryo dormancy. Experiments were performed on excised embryos in sterile culture. Little growth was noted on excised embryos, which possibly indicates dormancy within the embryo. In another experiment, whole seeds, seeds with endocarp removed, and acid scarified seeds were germinated in moist peat moss to observe inhibition by the endocarp. Seeds with endocarps removed, germinated quicker and in higher percentages than whole seed or scarified seed. Scarified seeds showed no improvement over whole seeds and radicles which were produced tended to be less vigorous. Whole seeds were also soaked for 24 hours in 1000 ppm GA and germinated in moist peat moss. Treatment with GA did improve radicle emergence.

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