珍稀植物青檀种子休眠与萌发的研究

为了探讨和研究青檀种子休眠和萌发特性,采用石蜡切片法、生物鉴定(白菜籽发芽实验)法、赤霉素溶液浸种、以及赤霉素与低温层积相结合等方法,寻找引起青檀种子休眠的原因和解除休眠的最佳措施。结果表明:青檀种子本身含有发芽抑制物和存在生理后熟是引起休眠的2个主要原因,用质量浓度为300mg/L的赤霉素溶液浸种24h或低温层积后用赤霉素处理均能在一定程度上解除休眠促进萌发,其中以低温层积25d后用500mg/L的赤霉素浸种36h效果最好。发芽率和发芽势分别达到83.5%和65%。

Seed dormancy and germination in rare plant Pterocektis tartarinowii Maxim

In order to investigate the characteristic of dormancy and germination,to find the reason of dormancy and the optimal measure for breaking the dormancy of Pterocektis tartarinowii Maxim seed,some methods such as seed slices of paraffin wax,biological identification,soaking seed in GA3,interaction GA3 and cold stratification were demonstrated.The results showed that physiological after-ripping and chemical inhibitors in seed were two principal reasons which cause the dormancy.By soaking the seed in 300mg/L GA3 solution for 24h or in GA3 solution following cold stratification cound overcome the dormancy of seed.The optimal measure was that soaking the seed in 500mg/L GA3 solution for 36h following cold stratification for 25d,with the percentage of germination and germination power of 83.5% and 65%.