桔梗种子发芽特性的研究

目的:通过对不同温度、光照条件、浸种时间和不同发芽基质的研究,找出桔梗种子发芽的最佳基本条件,从而为桔梗的规范化栽培提供一定的依据。方法:测定了桔梗种子的吸水率,利用不同浸种时间(12,24,36h),光照及黑暗,不同温度(10,15,20,25,30℃),不同发芽基质(纸间、纸上、纱间、纱上)等处理对桔梗种子进行发芽试验,测定其发芽率和发芽势。结果:在25℃下,桔梗种子的吸水率在36 h后达到最大,为120%。浸种时间对桔梗种子萌发的影响较小;不同温度和光照条件处理,对桔梗种子发芽率及发芽势的变化影响明显。结论:浸种12 h后,在25℃光照条件下进行纸上培养是桔梗种子萌发的最适条件。

Studies on germination characteristics of Platycodon grandiflorum seed

OBJECTIVE: To find out the optimal condition for the germination by studying the effects of light, temperature, seed soaking and cultivation condition on Platycodon grandiflourm, and offer the basis for standardized culture of P. grandflorum. METHOD: The rate of water absorption of the seed was determined. The germination of P. grandiflorum seed was tested under following conditions: treatments under different temperature (10,15,20,25,30 degrees C), light treatments (light and dark), seed soaking time (12,24,36 h) and different germination cultivation conditions (on filter paper, between filter paper, between gauze,on gauze). RESULT: The water absorption of the seeds reached the maximal 120% within 36 h at 25 degrees C. The time of seeds soaking had limited effect on the germination of the seed, while temperature and light condition showed significant effects on the germination. CONCLUSION: The optimal condition for the germination of the seed of P. grandiflorum is as follow:seed soaking for 12 h, and 25 degrees C underlight.