| Chionanthus virginica seed has the characteristic of dormancy and usually takes 18 months to
germinate in nature. In order to understand the causes of seed dormancy, this paper carried out the observation of
shape，determination of embryo viability and water permeability and seed parts inhibitor bioassay test. The results
showed that，the viability of seed was high，and the inhibitory effect of each part of extracts on cabbage increased
with concentration increasing, and the inhibition effect of endosperm was most obvious. Launched by the above
results，C. virginica seed germination potential was high，and the main causes of seed dormancy may be that there
were inhibitory substances in endosperm and embryo had dormancy. The lignified seed shell had a little effect on the
absorption of oxygen and water the inhibitory substances in shell had no significant effect on the seed dormancy, so it
was not the main reason for seed dormancy. |
