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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (33): 74-78.doi: 10.11924/j.issn.1000-6850.2012-3139

所属专题： 玉米

• 农学 农业基础科学 • 上一篇    下一篇

NaCl和Na2SO4胁迫下萌动的玉米种子发芽和淀粉转化的响应

张有福 陈春艳   

  • 收稿日期:2012-09-17 修回日期:2012-10-24 出版日期:2013-11-25 发布日期:2013-11-25
  • 基金资助:
    NO诱导玉米种子发芽抗盐的信号分子功能

Responce of NaCl and Na2SO4 Stress on Germination and Starch Conversion of Germinating Seeds of Maize

  • Received:2012-09-17 Revised:2012-10-24 Online:2013-11-25 Published:2013-11-25

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摘要： 为了研究盐胁迫下玉米种子萌发和贮藏物质转化的关系，本试验以玉米种子郑单958为材料，选用不同浓度NaCl和Na2SO4对玉米进行了萌发实验，测定了发芽率、芽干重和根干重及其淀粉、可溶性糖和蔗糖含量。结果表明：随着Na+浓度的增加，玉米种子的发芽率下降幅度增加，胚根和胚芽生长降低，这与种子中淀粉转化、蔗糖和可溶性糖含量下降趋势一致，且发芽率与淀粉转化显著正相关（p<0.05）。NaCl处理玉米种子的蔗糖显著高于Na2SO4处理（p<0.05）；然而，较低Na+浓度下，NaCl处理玉米种子的可溶性糖含量大于Na2SO4处理，较高的Na+浓度下，NaCl处理下其含量小于Na2SO4处理。可见，Na+浓度增加和阴离子种类的差异改变了淀粉转化率降低与糖分的分配，造成种子发芽过程能量供需的改变，发芽率降低。

关键词: 相关分析, 相关分析

Abstract: The maize seed（Zhengdan 958）were selected to study the relationship between germination and starch conversion in salty stress by germinating experiment under different concentrations of NaCl and Na2SO4. Germination rate, bud dry weight, root dry weight, starch, soluble sugar and sucrose content was determined. The results showed that, with increasing Na+ concentration, corn seed germination rate, radicle growth and plumule growth decreased, which is consistent with the trend of starch conversion, sucrose and soluble sugar content in seed, and maize seed germination rate was a significant positive related to starch conversion (p<0.05). There was higher sucrose content of seed in NaCl treatment than in Na2SO4 treatment. Soluble sugar content of seed in NaCl treatment was higher in in Na2SO4 treatment in low Na + concentration; however, it is controversial in higher Na+ concentration. Thus, increased salty concentration and species decreased the starch conversion rate, changed the distribution of sugar, it can be seen to change supply and demand of energy during germinating period, and result in reduced germination rate.

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