外源激素对珍稀濒危植物距瓣尾囊草种子萌发的影响

Effect of Exogenous Hormone on Seed Germination Characteristics of An Endangered and Rare Species Urophysa rockii Ulbr

为提高距瓣尾囊草种子的发芽速度和发芽率,更好地对珍稀濒危植物距瓣尾囊草种质资源进行保存、开发及可持续利用,研究了不同浓度的赤霉素(GA3)、吲哚乙酸(IAA)、萘乙酸(NAA)及6-苄氨基嘌呤(6-BA)4种外源植物激素对距瓣尾囊草种子萌发的影响。结果表明,在合适的浓度范围内,外源激素能提高距瓣尾囊草种子的发芽率,缩短发芽时间;800 mg/L的GA3、100 mg/L的NAA和1 mg/L的6-BA处理效果最佳,种子的萌发率分别为63.33%、76.67%和63.33%;而高浓度的NAA和6-BA对种子的萌发具有明显的抑制作用。

The effects of exogenous hormone （ GA3, IAA, NAA and 6-BA ） on seed germination characteristics of an endangered and rare species Urophysa rockii Ulbr were studied in this paper. The results showed that it can increase seed germination rate and short germination time of Urophysa rockii Ulbr in the appropriate concentrations range of exogenous hormones. The treatment of 800 mg/L of GA3,100 mg/L of NAA and 1 mg/L of 6-BA were suitable for seed germination of Urophysa rockii Ulbr, with the germination rate of 63.33% ,76.67% and 63.33%. Besides, seed germination rate were inhibited with high concentrations of NAA and 6-BA.