不同生境、温度及赤霉素处理对红毛五加种子层积催芽影响

为了提高红毛五加种子的发芽率,通过对红毛五加种子在不同温度条件下、不同浓度赤霉素(GA3)处理及不同生境种子进行层积催芽试验,研究不同层积催芽方法对红毛五加种子胚生长及发芽率影响。结果表明:红毛五加种子采摘后,经过90d左右的18℃高温层积处理过程,完成种子胚后熟生长,即完成种子形态后熟;红毛五加完成了种子胚的形态成熟后处于深度休眠中,4℃低温处理90d基本可以完成红毛五加可萌发种子的休眠过程;一定浓度GA3的有利于种胚在18℃高温条件下形成,种子的胚率提高,发芽率增加;不同生境条件下的红毛五加种子发芽率均存在着显著的差异。

Effect of Stratification at Different Habitats,Temperature and GA3 on Seeds Germination of Acanthopanax giraldii

Through germination test of the seeds of Acanthopanax giraldii on stratification of different temperature conditions,different treatment concentration of GA3 and different habitats seeds,the effects of seed embryo growth and germination rate on different stratification methods were studied.The results showed that the seed of Acanthopanax giraldii after its picking could completed embryo after-ripening growth,alse called seed morphological after-ripening after high temperature of 18℃ around 90 d stratification treatment process;It was still in depth dormancy after the seed embryo’s morphological after-ripening,and germination process could be completed under the temperature of 4℃ with 90 days.A certain concentration of GA3 was good for the forming of seed embryo in high temperature conditions of 18℃,as well as the increasing of forming rate of seed embryo and germination rate.The seeds of Acanthopanax giraldii germination rate were significant difference at different habitats.