On December 10 , IOD activities achieved to the lowest, which was coincidedwith the time when flower bud dormancy was broken.

• 12月10日，15℃与20℃处理桃花芽IOD活性均降至最低，这与桃花芽休眠解除的时间相一致，表明IOD活性最低时期的出现是桃花芽休眠解除的标志。