---

作 者 ：李城德;李唯*;栗孟飞;孙萍;王旺田;宋园园

期 刊 ：植物研究 2008年 28卷 5期 页码：618-621

关键词：桃儿七；种子；休眠；GA3；低温层积；

Keywords:Podophyllum hexandrum Royle, seed, dormancy, GA3, cold stratification,

摘 要 ：

桃儿七种子在自然条件下具有休眠期长、萌发不良的生理特性，为了探讨和研究桃儿七种子的休眠特性，利用分离胚培养、生物鉴定法、GA₃浸种、以及综合利用GA₃和低温层积处理等方法。结果表明：种皮和胚乳的限制以及生理后熟是引起桃儿七种子休眠的主要原因，用400 mg·L^-1的GA₃溶液浸种24 h或低温层积后用GA₃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90 d后用500 mg·L^-1的GA₃浸种36 h效果最好，发芽率和发芽势分别达到81.11%和50.00%。

Abstract:Seed of Podophyllum hexandrum Royle has the physiological characteristics of long dormancy and low germination in natural conditions. In order to investigate the characteristic of dormancy and find the mechanism of dormancy and the optimal method for breaking the dormancy of P.hexandrum seed, some methods such as isolated embryo cultures, biological identification, soaking seed in GA₃, interaction GA₃ and cold stratification were utilized. The results showed that seed coat and endosperm restriction, physiological after-ripping were principal reasons which caused dormancy. Soaking the seed in 400 mg·L^-1 GA₃ solution for 24 h or in GA₃ solution following cold stratification could break the dormancy. The optimal method was soaking the seed in 500 mg·L^-1 GA₃ solution for 36 h following with cold stratification for 90 d, after this treatment, the germination percentage and power reached 81.11% and 50.00% respectively.

---