欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2008, Vol. 28 ›› Issue (5): 618-621.doi: 10.7525/j.issn.1673-5102.2008.05.024

• 论文 • 上一篇    下一篇

濒危植物桃儿七种子休眠特性的研究

李城德1;李唯2*;栗孟飞2;孙萍2;王旺田2;宋园园2   

  1. (1.甘肃省种子管理站,兰州 730000) (2.甘肃农业大学生命科学技术学院,兰州 730070)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-09-20 发布日期:2008-09-20
  • 通讯作者: 李唯
  • 基金资助:
     

Seed Dormancy and Germination in Endangered Plant Podophyllum hexandrum Royle

LI Cheng-De;LI Wei*;LI Meng-Fei;SUN Ping;WANG Wang-Tian;SONG Yuan-Yuan   

  1. (1.Gansu seed administration station,Lanzhou 730000) (2.College of Life Science and Technology;Gansu Agricultural University,Lanzhou 730070)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-09-20 Published:2008-09-20
  • Contact: LI Wei
  • Supported by:
     

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%。

关键词: 桃儿七, 种子, 休眠, GA3, 低温层积

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.

Key words: Podophyllum hexandrum Royle, seed, dormancy, GA3, cold stratification

中图分类号: