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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (15): 238-242.

所属专题： 马铃薯

• 农学 农业基础科学 • 上一篇    下一篇

混合盐胁迫下马铃薯脱毒苗抗氧化系统及Na+、K+含量的变化

李亚平 孙晓光 蒙美莲   

  • 收稿日期:2010-02-23 修回日期:2010-04-30 出版日期:2010-08-05 发布日期:2010-08-05

Influence on Anti-oxidation System and Na+、K+ content in Potato under Mixed Slat Stress

  • Received:2010-02-23 Revised:2010-04-30 Online:2010-08-05 Published:2010-08-05

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摘要：

以紫花白品种为试验材料，采用组织培养方法，在离体条件下研究了NaCl和Na2SO4两种混合盐胁迫对马铃薯脱毒苗抗氧化系统及Na+、K+含量变化的影响。NaCl和Na2SO4分别按2：1（A），1：1（B）和1：2（C）摩尔比例混合，每一种比例下设7个盐浓度梯度，即0、0.15%、0.30%、0.45%、0.60%、0.75%和0.90%。主要结果如下：混合盐胁迫下，三种比例马铃薯脱毒苗SOD活性、POD活性变化趋势相似，均存在在某一盐浓度下活性突然增加的趋势，盐浓度对马铃薯脱毒苗叶片SOD活性、POD活性影响极显著，盐比例及盐浓度和盐比例交互作用对马铃薯脱毒苗叶片SOD活性、POD活性影响不显著；随混合盐浓度的增加Na+含量显著增加，K+含量平缓下降， Na+/K+比值则显著上升。

关键词: 豫东平原, 豫东平原, 夏花生, 高产施肥, 技术模式

Abstract:

Abstract: Influence on Anti-oxidation System and Na+、K+ content in were followed in plantlets in vitro of the cultivar Zihuabai under salt mixtures of NaCI and Na2SO4 in the ratio of 2: 1, 1: 1 and 1: 2 in molar concentration, which was further divided into the various concentrations of 0%, 0.15%, 0.30%, 0.45%, 0.60%, 0.75% and 0.90%, The results showed: Under salt mixtures stress, the change trend of SOD and POD activity are similarly. They were in a sudden increase at a certain concentration. Salt concentration had significant influence on SOD activity, POD activity. No interaction of salt concentration mixture was found for SOD activity, POD activity. The content of Na+ was significantly increased. But the content of K+ presents a gentle drop tendency. And Na+/K+ ratio increased significantly.