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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (13): 40-46.doi: 10.11924/j.issn.1000-6850.2011-3893

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

GA3、6-BA、Mn2+对楸树种子发芽的影响

马英 夏玲 刘卫东   

  • 收稿日期:2011-12-23 修回日期:2012-02-11 出版日期:2012-05-05 发布日期:2012-05-05
  • 基金资助:

    中南林业科技大学青年科学研究基金

The Impact of GA3, 6-BA, Mn2+ on Catalpabungei Seed Germination

  • Received:2011-12-23 Revised:2012-02-11 Online:2012-05-05 Published:2012-05-05

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摘要：

为了探寻适宜楸树种子萌发的条件，提高楸树种子发芽率，以楸树种子为试验材料，研究不同的温度、浸种时间以及GA3、6-BA、Mn2+浓度等因素处理对楸树种子发芽及幼苗生长的影响。结果表明：温度对楸树种子发芽影响显著，以28℃处理为好；浸种时间对种子发芽率无显著影响，但可加快发芽；一定浓度的GA3处理可有效提高楸树种子的发芽速度及发芽率，可在一定程度上使茎节间拉长，以100 mg/L较为适宜；6-BA处理后，种子的发芽率明显提高，但随着浓度增加，幼苗的茎变短变粗，过高浓度的6-BA抑制了幼苗根的发育，以20 mg/L处理较为适宜。0.01%浓度的Mn2+溶液处理后，发芽时间缩短，但随着浓度增加，Mn2+对根的毒害作用也呈现出来。楸树种子小、种皮薄，无需浸种但萌发需要保持一定的湿度、温度，可采用低浓度的GA3、6-BA、Mn2+促进种子发芽。

关键词: 农作物环境因子, 农作物环境因子

Abstract:

In order to find appropriate germination conditions for Catalpabungei seed and improve germination rate, the impact of temperature, soaking time, GA3、6-BA, Mn2+ on Catalpabungei seed germination and the growth of seedling was studied. The results showed that temperatures had significantly impacts on Catalpabungei seed germination, the appropriate temperature was 28℃. Soaking time had no significantly impacts on Catalpabungei seed germination. However, it could shorten germination time. Certain concentration of GA3 treatment could improve germination speed, germination rate and elongate seedling stem. 100 mg/L was the appropriate concentration. Seed after 6-BA treatment, germination rate was improved significantly. However, as the concentration increased, seedling stems became shorter and thicker. Higher concentration of 6-BA could inhibit seedling root development. 20 mg/L was the appropriate concentration for seed germination. 0.01% concentration of Mn2+ treatment shortened Catalpabungei germination speed, but high concentration of Mn2+ had toxic effects on seedling roots. Since Catalpabungei seed was small and testa was thin, it needed certain humidity, temperature without soaking seed. Low concentration of GA3, 6-BA and Mn2+ could promote seed germination.