A Study on Relations between Abscisic Acid and Absciss of Fruit of Hippophae rhamnoides

Exogenous abscisic acid can make the activity of carppodium of Hippophae rhamnoides increase immediately and causes absciss of enormous fruit. But this absciss is not concentrated and an absciss of a large number of leaves is also caused. High concentration of abscisic acid is harmful for the growth of twigs and even makes it die, and low concentration of it is available for the growth of autumn twigs. The analysis of endogenous hormone of the fruit that trops naturally shows that with the development of absciss the abcisic acid and the class of kinin increase obviously, and also there is a little increase of somatotropin. This result tallies with what the absciss of fruit treated by exogenous hormone.