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Temperature effects on the formation of DNA damage in Nicotiana tabacum leaf discs induced by UV-B Irriadiation

温度对UV-B诱导的烟草叶圆片DNA损伤的影响


环丁烷嘧啶二聚体(CPD)和6-4光产物(6-4PP)是两种主要的UV-B诱导的DNA光损伤产物。利用单克隆抗体酶联免疫吸附分析法(ELISA),研究了温度对UV-B诱导的烟草叶圆片DNA损伤的影响。室温(24℃)条件下,UV-B处理引起了烟草叶圆片DNA中CPD和6-4PP的积累。0℃条件下,UV-B处理的烟草叶圆片DNA中CPD和6-4PP的积累比室温下分别降低了9.8%和12%。UV-B诱导的DNA损伤曾被认为是纯粹的光化学过程而与不受温度影响,而本实验结果表明,UV-B诱导的烟草叶圆片DNA形成CPD和6-4PP的过程具有温度依赖性。这一特性有利于植物对全球变化的适应,因而具有重要的生态学意义。

Cyclobutane pyrimidine dimers(CPD) and 6-4 photoproducts(6-4PP) are two major kinds of photolesion induced by UV-B radiation in plants. By using ELISA method of with specific monoclonal antibodies, UV-B induced formation of CPD and 6-4PP in tobacco leaf discs at different temperatures was investigated. CPD increased during 4 h UV-B exposure. UV-B radiation induced formation of CPD and 6-4PP even at 0℃, but low temperature resulted in less damage. Contrary to the commonly accepted view that DNA damage induced by UV-B is temperature-independent because of its photochemical nature, we have thus found that UV-B-induced formation of CPD and 6-4PPin tobacco leaf discs is temperature-dependent.


全 文 :生 态科学2002年5月第2I卷第2期 Ec0LoGlcsc皿NcEMay2002,21(2):115一117
温度对UV—B诱导的烟草叶圆片聊悄损伤的影响
李韶山 (华南师范大学牛命科学学院,广州510631)
王 艳’ (暨南大学牛命科学技术学院,广州5j0632)
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【捕要】环丁蛀嘧啶二聚体(cPD)和6—4光产物(6—4PP)是两种主要的uv—B诱导的DNA光损伤产物。利用单克隆
抗体酵联免疫吸尉分析法(EUsA).研究了温度对uv—B涛导的烟草叶圆片DM损伤的影响。室温(240c)条件下,uv—
B处理引起了烟草叶囤片DNA中cPD和6—4PP的积累。0。c条件下,uv—B处理的烟草叶圆片DNA中cPD和6—4PP
的积累比室温下分别降低了9.8%和12%。uv—B诱导的DNA损伤曾被认为是纯粹的光化学过程而与不受温度影响.
而本实验结果表明.uv—B诱导的烟草叶圆片DNA形成cPD和6—4PP的过程具有温度依赖性。这一特性有利于植物
对全球变化的适应,因而具有重要的生态学意义。
关■词环丁烷嘭啶二聚体(CP卜)6—4光产物(6—4PP)DⅣA损伤 烟草叶圆片 温度 uVB
中圈分类号:Q946.2 文献标识码:A 文章编号:1008-8873f2002)一02.115一03
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,通讯作者:王艳(1卯。一 ).女.副教授,研究方向为分子生物
学和赤潮
2002—05_08收穑.2∞2—05-20接受
万方数据
万方数据
万方数据
温度对UV-B诱导的烟草叶圆片DNA损伤的影响
作者: 李韶山, 王艳, Lars Olof Bjorn
作者单位: 李韶山(华南师范大学生命科学学院,广州,510631), 王艳(暨南大学生命科学技术学院,广
州,510632), Lars Olof Bjorn(Department of Plant Physiology, Lund University,
Box 117, SE- 221 00 Lund, Sweden)
刊名: 生态科学
英文刊名: ECOLOGIC SCIENCE
年,卷(期): 2002,21(2)

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