赤霉素和细胞激动素对白刺种子萌发的调控研究

Regulatory effect of GA and KT on seeds germination of Nitraria tangutorum Bobr

为探讨白刺种子萌发特性,采用不同浓度赤霉素和细胞激动素处理方法,测定了白刺种子生活力、吸水率、发芽率、发芽势、发芽指数和萌发指数。结果表明:浸种最初的2h是白刺种子的迅速吸水期,整个吸水过程呈快—慢—缓慢规律。赤霉素和细胞激动素处理对白刺种子萌发有明显调控作用。150mg·kg-1的赤霉素处理24h,种子发芽势、发芽率、发芽指数、种子生活力最高,300mg·kg-1赤霉素处理的发芽势、发芽率、发芽指数最低。6mg·kg-1细胞激动素处理白刺种子1h,其发芽势、发芽率、发芽指数、种子生活力均最高,而10mg·kg-1细胞激动素处理白刺种子发芽率、发芽势、发芽指数、活力指数均最低。

Nitraria tangutorum Bobr. seeds were treated with GA and KT with different concentrations, and the vigor, water absorption rate, seed germination rate etc of seed tested. Results show that the water absorption rate of N. tangutorum seed rapidly increases in the first 2 hours, and the whole absortption procedure appears rapid-slow-slower regulation. The best germination feature appears in treatment of 150 mg·kg^-1 GA, meanwhile seed germination rate and other features are lowest under 300 mg·kg^-1 GA. 60 mg·kg^-1 KT showes best effect on improving seed germination with highest germination rate, germination energy, germination index and vigor index, while 100 mg·kg^-1 KT presents inverse effect.