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Position: Home > Articles > Effects of UV-B Radiation and Drought on Physiology and Antioxidant Enzyme in Transgenic Rice Seed 2011,30 (9) 14-17+21

紫外和干旱胁迫对转基因水稻生理和抗氧化酶的影响

作  者：
刘文;巩健;张承仁;赵凤云
单  位：
山东理工大学生命科学学院;山东省淄博职业学院制药与生物工程系
关键词：
转基因水稻;紫外胁迫;紫外和干旱复合胁迫;抗氧化酶
摘  要：
以携带谷胱甘肽转移酶(GST)和过氧化氢酶(CAT 1)的转基因水稻和非转基因水稻(Oryza sativa L.中花11)的地上部分为材料,比较分析了二者在不同强度紫外胁迫及紫外和干旱复合胁迫下生理和抗氧化酶活性的变化。结果表明,单一紫外和紫外+干旱复合胁迫条件下,转基因水稻的株高、相对含水量、叶绿素含量、光合效率及GST、CAT、SOD和APX的活性都高于非转基因水稻;而转基因水稻MDA的积累量则低于非转基因水稻;说明转基因水稻对紫外和干旱胁迫的抵抗能力有所提高。此外,本实验条件下,紫外+干旱复合胁迫比单一紫外胁迫(尤其在强辐射组)对植株的伤害轻,说明干旱对紫外胁迫有一定的缓解作用,这种缓解作用对转基因水稻更加明显。
译  名：
Effects of UV-B Radiation and Drought on Physiology and Antioxidant Enzyme in Transgenic Rice
作  者：
LIU Wen1,GONG Jian2,ZHANG Cheng-ren1,ZHAO Feng-yun1(1.College of Life Sciences,Shandong University of Technology,Zibo Shandong 255049,China;2.Pharmaceutical and Biological Engineering Department,Zibo Vocational Institute,Zibo Shandong 255314,China)
关键词：
transgenic rice;UV-B radiation stress;combined UV-B radiation and drought; antioxidant enzyme
摘  要：
A comparative study on changes of physiology and antioxidant enzyme in transgenic rice carrying glutathione-S-transferase(GST,EC.2.5.1.18) and catalase1(CAT 1,EC.1.11.1.6)and non-transgenic rice(Oryza sativa L.Zhonghua No.11) exposed to UV-B radiation stress or combined UV-B radiation and 10% PEG drought stress was conducted.The results showed that when subjected to UV-B radiation and combined UV-B radiation and drought,the shoot length,relative water content,total chlorophyll content and photosynthetic rate were higher in the transgenetic rice(T) than that of non-transgenetic rice(N).The content of MDA were lower in T than that of N,and the activity of GST,CAT,SOD,APX in the shoots of T was higher than that of N.The results indicated that the expression of GST and CAT in the transgenic rice resulted in increased tolerance to UV and drought stress.Moreover,under this experiment condition,less damage was observed in the combined UV-B radiation and drought(especially under strong radiation) treated rice than that of single UV-B radiation treated one.It implied that drought stress relieived ultraviolet stress to certain degree,especially in transgenetic rice.

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