| 抗氧化系统在H2O2诱导的玉米幼苗耐热性形成中的作用 |
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| 引用本文： | 李忠光,龚明. 抗氧化系统在H2O2诱导的玉米幼苗耐热性形成中的作用[J]. 植物生理学通讯, 2003, 39(6): 575-579 |
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| 作者姓名： | 李忠光 龚明 |
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| 作者单位： | 云南师范大学生命科学学院,昆明,650092 |
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| 基金项目： | 国家自然科学基金 ( 3 9860 0 0 7)，云南省自然科学基金( 98C0 0 2Z)，教育部优秀高校青年教师教学科研奖励计划( 2 0 0 1年度 ) |
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| 摘 要： | H2O2预处理可显著增强玉米幼苗的耐热性.H2O2预处理后,玉米幼苗抗氧化酶谷胱甘肽还原酶(GR)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)的活性及还原型抗氧化剂抗坏血酸(ASA)和谷胱甘肽(GSH)的水平显著提高,且H2O2预处理过的幼苗在高温处理期间及其后的恢复过程中均能保持相对较高的抗氧化酶活力和还原型/氧化型抗氧化剂比例.
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| 关 键 词： | H2O2 玉米幼苗 耐热性 抗氧化酶 抗氧化剂 |
| 修稿时间： | 2003-01-06 |
Involvement of Antioxidant Systems in the Formation of H2O2-induced Heat Tolerance in Maize Seedlings |
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| Abstract: | H 2O 2 pretreatment could improve greatly heat tolerance of maize seedlings. H 2O 2 pretreatment significantly enhanced the activities of antioxidant enzymes GR, SOD, CAT and APX and the levels of antioxidants GSH and ASA in maize seedlings under normal culture condition. The seedlings with H 2O 2 pretreatment could also retain retatively higher activities of the antioxidant enzymes and ratio of reduced to oxidized form antioxidants, indicating that enhancement of antioxidant system activities by H 2O 2 pretreatment could be an important physiological basis for the formation of H 2O 2-induced heat tolerance in maize seedlings. |
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| Keywords: | hydrogen peroxide maize (Zea mays) seedlings heat tolerance antioxidant enzymes antioxidants |
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