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应用生态学报 ›› 2004, Vol. ›› Issue (5): 763-766.

• 研究论文 • 上一篇    下一篇

土壤施钙诱导水稻幼苗抗低温和抗病生理机制研究

刘峰1, 张军2, 张文吉2, 王洪刚1   

  • 收稿日期:2002-10-12 修回日期:2003-02-28
  • 通讯作者: 王洪刚
  • 基金资助:
    国家自然科学基金项目(39670429);山东农业大学博士基金;山东农业大学博士后基金资助项目

Physiological mechanism of rice seedlings in low temperature-and damping-off disease resistance induced by calcium application into soil.

LIU Feng1, ZHANG Jun2, ZHANG Wenji2, WANG Honggang 1   

  1. 1. Shandong Agricultural University, Tai'an 271018, China;
    2. China Agricultural University Beijing 100094, China
  • Received:2002-10-12 Revised:2003-02-28

摘要: 试验发现,以干土重1%的CaO混土处理培育水稻秧苗,能显著提高幼苗的抗低温和抗立枯病能力.对其生理机制研究表明,该处理对水稻幼苗体内活性氧清除酶系统具有显著影响.与空白对照处理相比,施钙处理的水稻幼苗根部和地上部SOD活性增强;根部POD活性显著增强,地上部POD活性下降;根部和地上部CAT活性则先下降,后上升;根部和地上部的可溶性蛋白含量均有所上升.POD同工酶PAGE电泳结果表明,CaO处理的水稻幼苗地上部POD同工酶谱带明显减弱和减少,而根部POD同工酶谱带增强和增多.这些结果揭示了土壤施加CaO可提高水稻幼苗抗低温和抗病能力的部分原因.

关键词: 水稻, 活性氧清除酶系, 钙, 抗逆性

Abstract: Applying calcium oxide into soil could improve the ability of rice seedlings in low temperature-and damping-off disease resistance.After treated with calcium,the active oxygen eliminating enzyme activities of rice seedlings increased significantly.Compared with control,the SOD activity in seedling's root and shoot increased.The POD activity in rice seedling's root also increased,but decreased in shoot.The CAT activities decreased at the early stage,but increased at late stage.The soluble protein content in seedling's root and shoot was higher than that of the control.In the PAGE pattern of isoperoxidase,the band number of shoot increased,but that of root decreased.All these changes were part of reasons that applying calcium oxide into soil improved the resistance of rice seedlings to cold and damping-off disease.

Key words: Rice, Active oxygen eliminating enzyme system, Calcium, Stress resistance

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