According to our study, we have drawn a conclusion that entogenous hormone, acetone and stratification play an important role in breaking dormancy of Aralia elate seeds in some degree. In this thesis the effect of them on breaking dormancy as well as the potential mechanism of that has been discussed based on our close research on the cause of dormancy and on the way to break it. Both of them are explained in some respects, including not only entogenous hormone and signal transconduction but substance metab...