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

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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)

Abstract:

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

CLC Number: 

  • Q 945