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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (20): 149-153.

所属专题： 小麦

• 农学 农业基础科学 • 上一篇    下一篇

冬小麦抗旱性与膜脂过氧化的关系及其氮素调控机理

苟升学   

  • 收稿日期:2009-03-16 修回日期:2009-06-09 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:

    小麦不同基因型抗旱生理机制研究

The relationship of drought resistance and cell membrane superoxide of winter wheat mediated by nitrogen

  • Received:2009-03-16 Revised:2009-06-09 Online:2009-10-20 Published:2009-10-20

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摘要：

在大田试验条件下，测定了两个不同抗旱性小麦品种郑麦9023（水地品种，抗旱性差）和长武134（旱地品种，抗旱性强）在不同施氮量条件下拔节期叶片MDA、H2O2含量以及SOD、CAT活性的变化。结果表明，抗旱性和小麦叶片的保护酶活性和膜质伤害物质的含量密切相关，而且受氮素营养的调控。抗旱品种相对不抗旱品种具有较高的SOD和CAT活性，而MDA和H2O2较低；MDA和H2O2含量随施氮量的增加呈现先降后升的趋势，而SOD和CAT则呈相反的变化趋势。

关键词: 驻马店, 驻马店, 优质, 专用小麦, 品质区化

Abstract:

The content MDA and H2O2, the activity of SOD and CAT in the leaf of Zhengmai 9023 (drought-vulnerable wheat variety) and Changwu134 (drought – resistant wheat variety) which applied by difference quantity nitrogenous manure have investigated under field. The result showed that the drought-resistance relate to the leaf protectase activity and cell membrane superoxide significantly, moreover, mediated by nitrogen manure. The drought-resistant wheat variety has the higher protectase activity than drought-vulnerable wheat variety and lower MDA and H2O2 content; the dynamics of MDA and H2O2 content is reduced firstly and than increased as applied nitrogen manure quantity increased, it is contrary to protectase.