王娟, 李德全. 水分胁迫对玉米根系AsA-GSH H202含量的影响[J]. 中国生态农业学报(中英文), 2002, 10(2): 94-96.
引用本文: 王娟, 李德全. 水分胁迫对玉米根系AsA-GSH H202含量的影响[J]. 中国生态农业学报(中英文), 2002, 10(2): 94-96.
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WANG Juan, LI De-Quan. Effects of water stress on AsA-GSH cycle and H202 content in maize root[J]. Chinese Journal of Eco-Agriculture, 2002, 10(2): 94-96.
Citation: WANG Juan, LI De-Quan. Effects of water stress on AsA-GSH cycle and H202 content in maize root[J]. Chinese Journal of Eco-Agriculture, 2002, 10(2): 94-96.
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水分胁迫对玉米根系AsA-GSH H202含量的影响

Effects of water stress on AsA-GSH cycle and H202 content in maize root

    摘要
  • 摘要: 以“鲁玉14”、“掖单13”2个不同抗旱性玉米品种为材料，研究不同浓度聚乙二醇-6000(PEG-6000)处理下根系抗坏血酸-谷胱甘肽(AsA-GSH)循环中关键酶和抗氧化剂的变化及其对过氧化氢(H202)含量的影响结果表明，谷胱甘肽还原酶(GR)、抗坏血酸过氧化物酶(APX)活性及谷胱甘肽(GSH)含量变化为当聚乙二醇溶液浓度低于100g／kg时，随水分胁迫的增强而上升，当聚乙二醇溶液浓度高于150g／kg时，随水分胁迫的增强而下降。抗坏血酸(AsA)含量随水分胁迫的增加而持续下降，H202含量随水分胁迫的加剧而增加。聚乙二醇溶液浓度为150～250g／kg处理下H202含量的增加与抗氧化酶活性、抗氧化剂含量的下降呈显著正相关。2品种比较，抗旱性强的品种具有较强的抗氧化能力。

     

    Abstract: H202 content and the change of main antioxidants in AsA-GSH cycle in two maize species with different resistances to drought were studied under water stress．The results showed that the activities of GR．APX and the content of GSH were obviously increased when the PEG concentration was lower than 100g／kg while they decreased when the PEG concentration was higher than 1.50g／kg．The content of AsA declined under different degrees of water stress．H202 content was increased under water stress conditions．The increase of H202 content is obviously positive correlation with the decrease of activity(content)of the antioxidants under severe water stress．The variety with stronger resistance to drought had higher activity of antioxidation．

     

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