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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (13): 187-190.

所属专题： 生物技术； 水稻

• 农学 农业基础科学 • 上一篇    下一篇

镉胁迫下硅对水稻生物量及生理特性的影响

刘鸣达 王丽丽 李艳利   

  • 收稿日期:2010-02-12 修回日期:2010-03-22 出版日期:2010-07-05 发布日期:2010-07-05
  • 基金资助:

    无

Effect of Si on Biomass and Physiological Characteristics of rice under Cd Stress

  • Received:2010-02-12 Revised:2010-03-22 Online:2010-07-05 Published:2010-07-05

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摘要：

摘 要：通过水培试验，研究了镉胁迫(3 mg/L，以Cd计)下不同加硅量(0、30、60、90 、120mg/L，以SiO2计)对水稻生物量、植株含镉量、过氧化氢酶(CAT)的活性、丙二醛(MDA)和游离脯氨酸(Pro)含量的影响，结果表明：与无硅处理相比，加硅使水稻茎叶鲜重增加11.1%～14.39%，根重增加15.7%～25.7%，株高增加8.0%～13.6%；植株含镉量23.9%～26.5%；叶片CAT活性增加12.3%～16.6%，MDA含量降低18.0%～24.6%，Pro含量降低31.5%～33.7%。加硅处理与对照间的差异均达到5%显著水平。水稻叶片CAT活性与植株镉含量间呈线性负相关关系(r=0.980＊＊,n=5)， MDA含量与植株镉含量间呈线性正相关关系(r=0.956＊,n=5)，Pro含量与植株镉含量间呈线性正相关关系(r=0.990＊＊,n=5)。上述结果说明，加硅抑制水稻吸收镉，改善水稻逆境生理状况，缓解了镉对水稻的毒害作用，促进了水稻的生长发育。

关键词: 蔬菜, 蔬菜, 种衣剂, 研究, 应用

Abstract:

Abstract：The water culture experiment was conducted to investigate the effects of different concentrations of Si (0、30、60、90 mg/L, SiO2) under 3 mg/L Cd stress on seedling biomass, Cd content in plants, catalase (CAT) activity, malondialdehyde (MDA) content and proline (Pro) content. The results showed: the fresh weight of rice shoots and stems was increased by 11.1%～14.39%, that of roots was increased by 15.7%～25.7%, the height of plants was increased by 8.0%～13.6%, the content of Cd in plants was decreased by 23.9%～26.5%, the activity of CAT was increased by 12.3%～16.6%, the content of MDA was decreased by18%～25% and the content of Pro was decreased by 31.5%～33.7% compared with the treatment without Si addition. The correlation was significant between the treatment adding Si and not. A negative correlation between CAT activity and Cd content of rice plant was found(r=0.980＊＊;n=5). A positive correlation between MDA content and Cd content of rice plant was found(r=0.956＊;n=5) and the same correlation was found between Pro and Cd content of rice plant(r=0.990＊＊;n=5). These results suggested that Si addition could inhibit Cd adsorption by the plants, improve physiological characteristics of rice, alleviate the toxicity of Cd to rice and promote the growth of it.