不同贮藏条件对3种药用植物种子活力的影响

目的]研究不同贮藏条件对3种药用植物种子活力的影响。方法]以白术、黄芩和远志3种药用植物种子为材料,分别将含水量为3%、5%和15%的3种处理的种子在-10、0、20和36℃条件下贮藏1年,对3种药用植物种子在贮藏1年后的发芽率和活力指数的变化规律进行了初步研究。结果]在温度和含水量2个控制因素中,含水量对种子发芽率和活力指数的影响较温度更为明显;3种药用植物种子的发芽率和活力指数均随贮藏温度和种子含水量的增加而降低;当种子含水量控制在3%或5%时,温度的高低对种子发芽率和活力指数的影响不明显,而含水量为15%的种子在0℃环境下的种子发芽率和活力指数维持在较低水平。结论]含水量和贮藏温度对种子的发芽率和活力指数均有影响。

Effects of Storage Condition on Seed Vigor of Three Medicinal Plants

Objective] To study the effects storage condition on seed vigor of three medicinal plants.Method] With the seeds of Atractylodes macrocephala Koidz.,Scutellaria baicalensia Georgi.seed and Polygala tenuifolia Willd.as the plant materials,seeds with moisture contents of 3%,5% and 15% were stored at –10 ℃,0 ℃,20 ℃ and 36 ℃ for one year.Change laws of germination rate and vigor index of three medicinal plant seeds stored after one year were preliminarily researched.Result] Among the two controlling factors,water content had more significant impact on seed germination rate and vigor index than temperature.Germination rate and vigor index of three medicinal plant seeds reduced as the decrease of storage temperature and seed water content.When the water content was controlled within 3%-5%,temperature had no significant impact on the seed germination rate and vigor index.However,seeds with 15% water content at 0 ℃ showed relatively low germination rate and vigor index.Conclusion] Both seed germination rate and vigor index were affected by water content and storage temperature.