| 硅对盐胁迫下水稻幼苗保护酶活性和离子吸收的影响 |
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| 引用本文： | 叶利民.硅对盐胁迫下水稻幼苗保护酶活性和离子吸收的影响[J].吉林农业科学,2012(3):22-24. |
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| 作者姓名： | 叶利民 |
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| 作者单位： | 上饶师范学院生命科学学院 |
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| 基金项目： | 上饶师范学院科研基金资助项目(1205) |
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| 摘 要： | 以水稻(Oryza sativa L.)为试验材料,采用叶面喷施K2SiO3的方法,研究了不同浓度硅处理对盐胁迫下水稻幼苗叶片保护酶活性及离子吸收的影响。结果表明,盐胁迫下水稻叶片SOD、POD活性均显著降低,MDA含量显著提高,喷施1.0～2.0 mmol/L K2SiO3处理显著提高了水稻叶片SOD和POD活性,降低了MDA含量,减轻了盐胁迫下叶片膜脂过氧化程度。盐胁迫显著降低了地上和地下部分对K+、Ca2+、Mg2+的吸收,增加了对Na+的吸收,1.5～2.5 mmol/L K2SiO3处理可显著增加水稻幼苗地上、地下部分K+、Ca2+、Mg2+的积累,降低Na+的积累。硅处理的最佳浓度为1.5 mmol/L。另外,叶面喷施硅后,水稻茎秆中SiO2的含量提高了,茎秆的抗倒伏能力增强。
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| 关 键 词： | 硅 盐胁迫 水稻 保护酶活性 离子吸收 |
Effects of Silicon on Antioxidant Enzymes Activities and Ions Uptake of Rice Seedlings under Salt Stress |
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| YE Li-min.Effects of Silicon on Antioxidant Enzymes Activities and Ions Uptake of Rice Seedlings under Salt Stress[J].Jilin Agricultural Sciences,2012(3):22-24. |
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| Authors: | YE Li-min |
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| Institution: | YE Li-min(College of Life Science,Shangrao Normal University,Jiangxi Shangrao 334001,China) |
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| Abstract: | The effects of silicon on antioxidant enzymes activities and ion content of rice under the salt stress were studied by the method of K2SiO3 foliar spraying.The results showed that the SOD and POD activities were significantly decreased and the MDA content was significantly increased under salt stress.1.0-2.0 mmol L-1 K2SiO3 treatment significantly promoted SOD and POD activities,reduced the MDA content and alleviated the level of membrane lipid oxidation in rice seedlings under the salt stress.Salt stress significantly reduced K+,Ca2+,Mg2+ uptake of shoot and root but increased Na+ uptake.1.5-2.5 mmol L-1 K2SiO3 treatment significantly increased the K+,Ca2+,Mg2+ accumulation of shoot and root,but decreased Na+ accumulation.1.5 mmol L-1 was the best concentration of silicon to alleviate the salt injury of rice.In addition,the SiO2 content of rice stalk was improved after silicon treatment,so the stalk was lodging resistant. |
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| Keywords: | Silicon Salt stress Rice Activity of antioxidant enzymes Ions uptake |
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