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Plant Diversity ›› 2015, Vol. 37 ›› Issue (05): 586-594.DOI: 10.7677/ynzwyj201515007

• 研究论文 • 上一篇    下一篇


 憨宏艳1、2, 许宁1、2, 李珊1、2, 张雪梅1、2   

  1. 1 西华师范大学西南野生动植物资源保护教育部重点实验室;2 西华师范大学生命科学学院,四川 南充637009
  • 收稿日期:2015-01-15 出版日期:2015-09-25 发布日期:2015-04-28
  • 基金资助:

    国家自然科学基金项目 (31370367);四川省教育厅自然科学重点项目 (12ZA169)

The Effect of Low Temperature during Imbibition on Germination Characteristics of Tetracentron sinense (Tetracentraceae) Seeds

 HAN  Hong-Yan-1、2, XIU  Ning-1、2, LI  Shan-1、2, ZHANG  Xue-Mei-1、2   

  1. 1 Key Laboratory of Southwest China Wildlife Resources Conservation; 2 College of Life Science,
    China West Normal University, Nanchong, Sichuan 637009, China
  • Received:2015-01-15 Online:2015-09-25 Published:2015-04-28
  • Supported by:

    国家自然科学基金项目 (31370367);四川省教育厅自然科学重点项目 (12ZA169)


通过模拟野外环境条件的变化,研究吸胀期低温处理对水青树种子萌发的影响,以探讨限制水青树种群更新的影响因素。研究发现:(1) 水青树种子的吸胀过程可以分为4个阶段,其吸水量将随土壤湿度的增加而增加,并在30%土壤湿度条件下基本达到充分吸胀状态;(2) 随着野外埋藏时间的延长,水青树种子萌发率、发芽势及含水量均呈上升趋势,活力指数呈现先上升后逐渐下降的趋势;(3) 经不同低温处理的水青树种子,在20%或30%土壤湿度吸胀条件下,其萌发特性达到最高;(4) 在20%土壤湿度条件下,低温处理2~4d或21~28d时,0℃最适于水青树种子的萌发;在30%土壤湿度条件下,低温处理14~28d时,-7℃最适于水青树种子的萌发;(5) 在相同冷冻时间的条件下,随温度的降低,落叶中水青树种子的萌发率无显著变化;在相同低温条件下 (0℃低温除外),种子的萌发率会在冷冻28d后有所提高。结果表明:一定范围内的吸胀期低温处理对水青树种子的萌发并无抑制作用,并不是限制水青树种群更新的主要因素。

关键词: 水青树, 种子萌发, 吸胀, 低温, 种群更新


In this paper, the effects of low temperature, soil moisture and freezing time on the germination of Tetracentron sinense Oliv. seeds were studied by simulating wild environment conditions, and the factors influencing the natural regeneration of Tsinense population were discussed. The results are as follows: (1) The imbibition process of Tsinense seed can be divided into four stages, the water absorbing capacity of Tsinense seed after imbibition would increase with the increase of soil moisture, and the seeds would be fully imbibed under the condition of 30% soil moisture; (2) The germination rate, germination force and water content of Tsinense seed increased with the increase of storage time, and the vigor index gradually decreased after increasing before; (3) At different low temperature, the germination rate of Tsinense seed reached the highest when the soil moisture is 20% or 30%; (4) When treated at 20% soil moisture for 2-4 days or 21-28 days, 0℃ is best for the germination rate of Tsinense seed; when treated at 30% soil moisture for 14-28 days, -7℃ is best fort he germination rate of Tsinense seed; (5) When treated at the same condition of freezing time, the germination rate of seeds in fallen leaves had no significant difference with the decrease of low temperature; under the same condition of low temperature (0℃ low temperature except), the germination rate increased after frozen 28 days. The results showed that there is no significant influence of low temperature during imbibition on germination characteristics of Tetracentron sinense seeds and indicating that low temperature during imbibition is not the main factor influencing the natural regeneration of Tsinense population.

Key words: Tetracentron sinense Oliv, Seed germination, Imbibition, Low temperature, Natural regeneration