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抗氧化系统在热激诱导的玉米幼苗耐热性形成中的作用 被引量：18

Involvement of Antioxidant Systems in Heat-Shock-Induced Heat Tolerance in Maize Seedlings
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摘要 玉米幼苗经过42℃热激4h并恢复4h后,显著提高了玉米幼苗在高温处理下的存活率。热激并恢复4h后,不同程度地提高了抗氧化酶系统过氧化氢酶(CAT),超氧化物歧化酶(SOD),谷胱甘肽还原酶(GR),抗坏血酸过氧化物酶(APX)和过氧化物酶(GPX)的活性以及抗氧化剂还原型抗坏血酸(ASA)和谷胱甘肽(GSH)的含量,且经过热激的玉米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性和抗氧化剂水平,说明保持较高的抗氧化酶活性和抗氧化剂水平是热激诱导的玉米幼苗耐热性形成的生理基础之一。 Heat-shock pretreatment at 42℃ for 4 h and recovery at 26.5℃ for 4 h greatly improved greatly survival percentage of maize seedlings under high temperature stress. Heat-shock pretreatment and recovery at 26.5℃ for 4 h significandy enhanced the activities of antioxidant enzymes CAT, SOD, GR and APX and the levels of antioxidants ASA and GSH in maize seedlings. The seedlings with heat-shock retained higher activities of antioxidant enzymes and higher levels of antioxidants than that without heat-shock during heat stress and recovery, indicating that the increase of activities of antioxidant enzymes and levels of antioxidants is the physiological basis for the formation of heat tolerance induced by heat-shock in maize seedlings.
作者 李忠光 龚明
机构地区 云南师范大学生命科学学院
出处 《云南植物研究》 CAS CSCD 北大核心 2007年第2期231-236,共6页 Acta Botanica Yunnanica
基金 国家自然科学基金(39860007 30460016) 云南省自然科学基金(2006C0030M) 云南省教育厅基金(06Y117B) 高校青年教师教学科研奖励计划(2001年度)
关键词 玉米幼苗 热激 耐热性 抗氧化酶 抗氧化剂 Maize （ Zea mays） seedlings Heat shock Heat tolerance Antioxidant enzymes Antioxidants
分类号 S513 [农业科学—作物学]
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参考文献29

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二级参考文献34

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共引文献227

同被引文献315

引证文献18

二级引证文献95

云南植物研究
2007年 第2期

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