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| 两种生态型黄瓜幼苗光系统I抗氧化酶对弱光的响应 | |
| 引用本文： | 米国全,刘丽英,金宝燕,张振贤,任华中.两种生态型黄瓜幼苗光系统I抗氧化酶对弱光的响应[J].华北农学报,2011,26(4). |
| 作者姓名： | 米国全 刘丽英 金宝燕 张振贤 任华中 |
| 作者单位： | 1. 河南省农业科学院园艺所,河南郑州,450002 2. 中国农业大学农学与生物技术学院,北京,100193 3. 北京市海淀区西北旺镇农业综合服务中心,北京,100094 |
| 基金项目： | 国家“973”项目(2009CB11900); 国家科技支撑项目(2009BADB8B02;2011BAD12B03); 中央高校基本科研业务费专项资金项目(15050702); 果类蔬菜产业技术体系北京市创新团队项目 |
| 摘 要： | 以2种生态型黄瓜品种为材料,在人工气候室内,研究了弱光对光系统I(PSI)水-水循环电子传递过程中一系列酶活性的影响,以期了解黄瓜苗期弱光响应的生理机制。结果表明,在弱光胁迫的早期,超氧化物歧化酶(SOD)、抗坏血酸过氧化氢酶(APX)和脱氢抗坏血酸还原酶(DHAR)活性比对照有所增加,但随着黄瓜幼苗对弱光的不断适应,3种酶活性逐渐降低。此时,耐弱光型品种(S1)叶片中的SOD、APX和DHAR活性增幅要明显高于S404,而单脱氢抗坏血酸还原酶(MDHAR)和谷胱甘肽还原酶(GR)活性在两供试材料中与对照相比均有所减弱。弱光下,S1叶片中MDHAR活性高于S404,而GR活性却低于S404。因此,耐弱光型黄瓜品种具有较高地清除活性氧和自由基的能力,可能通过调节NADPH在PS I水-水循环电子传递链中的分配来更好地适应弱光逆境。 |
| 关 键 词： | 黄瓜 弱光 光系统I 抗氧化酶 |
Effect of Low Light Stress on Antioxidant Enzymes in Water-water Cycle of PS I of Two Ecotype Cucumber Seedlings |
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| MI Guo-quan,LIU Li-ying,JIN Bao-yan,ZHANG Zhen-xian,REN Hua-zhong.Effect of Low Light Stress on Antioxidant Enzymes in Water-water Cycle of PS I of Two Ecotype Cucumber Seedlings[J].Acta Agriculturae Boreali-Sinica,2011,26(4). | |
| Authors: | MI Guo-quan LIU Li-ying JIN Bao-yan ZHANG Zhen-xian REN Hua-zhong |
| Institution: | MI Guo-quan1,LIU Li-ying2,JIN Bao-yan3,ZHANG Zhen-xian2,REN Hua-zhong2(1.Horticultural Institute,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China,2.College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,3.Integrated Agricultural Service Center of Xibeiwang Town,Beijing 100094,China) |
| Abstract: | Influences of low light on the activities of antioxidant enzymes in the electron transport of water-water cycle of PS I of two ecotypes of cucumber(Cucumis sativus L.cv.S1 and S404) seedling in artificial climatic chamber were studied.The trial aims to realize the physiology mechanism of low light response of cucumber seedlings.Results showed that,compared to the controlled condition,SOD,APX and DHAR activities in cucumber leaves were all increased during the early stage after low light treatment,but then d... |
| Keywords: | Cucumber Low light PS I Antioxidant enzymes |
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