关键词: 油菜品种, 内源激素, 催熟剂, 乙烯, ABA, IAA

Abstract:  To study the effects of ripener on endogenous hormones in rapeseed， and promote the shell and seeds unified maturity and meet mechanized harvesting, 4 rapeseed varieties with different maturity periods and compound ripener （0.5% ethephon + 0.3% diquat） were used to study the difference of endogenous hormones and the effects of ripener on endogenous hormones in 4 rapeseed varieties. It was found that during maturity period， the differences of endogenous hormones content in different rapeseed varieties were remarkable. The contents of ethylene and ABA in earlymaturing varieties were higher than those in latematuring varieties， the fastigium of them appeared earlier but fell faster. While the content of IAA showed contrary to ethylene and ABA. After spraying with ripener， the contents of ethylene and ABA raised while IAA decreased. The increment of ethylene in shell exceeded that in seeds dramatically， which lasted longer in latematuring varieties. The law of increasing of ABA content showed contrary to ethylene. The falling range of IAA content in shell and seeds were entirely different among different varieties. The results indicated that ripener could promote rape seed ripening by regulating the release of endogenous hormones.

Key words: rapeseed varieties, endogenous hormone, ripener, ethylene, ABA, IAA