中国中药杂志

2009, v.34(23) 2995-2998

[打印本页] [关闭]
本期目录(Current Issue) | 过刊浏览(Past Issue) | 高级检索(Advanced Search)

增强UV-B辐射对胡椒薄荷叶片光合机构和光合特性的影响
Effect of enhanced UV-B radiation on photosynthetic structure and photosynthetic characteristics of Mentha piperita

吴能表;马红群;胡丽涛;洪鸿;孙金春;张扬欢;戴大临;
WU Nengbiao,MA Hongqun,HU Litao,HONG Hong,SUN Jinchun,ZHANG Yanghuan,DAI Dalin(Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education),School of LifeScience,Southwest China University,Chongqing 400715,China)

摘要(Abstract):

目的:为了阐明紫外辐射胁迫对药用植物胡椒薄荷生长发育的影响,模拟大气中紫外辐射增强的情况,考查了不同强度UV-B辐射胁迫对胡椒薄荷的光合作用的影响。方法:实验设置了自然光对照(0 W.m-2),轻度UV-B辐射胁迫(0.15 W.m-2)和重度辐射胁迫(0.35 W.m-2)3个不同处理组,探讨了不同强度UV-B辐射对胡椒薄荷叶绿体超微结构、光合作用和叶绿素荧光参数的影响。结果:在轻度UV-B辐射胁迫下,胡椒薄荷叶绿体超微结构虽然受到了一定程度的破坏,但处理过程中,Fv/Fm,Fv/Fo,qP,ΦPSⅡ和ETR在一段时间内降低后仍能恢复到和自然光对照相当的水平,qN表现出先升高后降低的趋势,而处于重度UV-B辐射胁迫下的胡椒薄荷,由于其光合机构受到严重破坏,通过自身保护机制已不能恢复到相应水平。结论:胡椒薄荷处于轻度UV-B辐射胁迫时,光合能力虽然在一定程度上有所降低,但是可以通过较强的热耗散来保护光合机构。研究证实胡椒薄荷对轻度紫外辐射胁迫有良好的适应能力,可在紫外辐射偏强的地方广泛种植,具有一定的经济效应。
Objective:To reveal the effects of UV-B radiation on the growth of medical plant Mentha piperita,simulate an enhanced UV-B radiation and evaluate intensity of radiation on the photosynthesis of M.piperita.Method: Three different levels of UV-B radiation were set in the experiment which included: natural light control(0 W·m-2),light UV-B radiation stress(0.15 W·m-2) and heavy UV-B radiation stress(0.35 W·m-2).The chloroplast ultrastructure,photosynthesis indexes and chlorophyll fluorescence parameters of the M.piperita were observed under the three treatments.Result: Although the chloroplast ultrastructure was destroyed to some degree under the light UV-B radiation stress,Fv/(F)m,Fv/Fo,qP,ΦPSⅡ and ETR could resume to the comparative level of natural light control.At the same time,qN increased firstly and decreased thereafter.But under the high strength UV-B radiation stress,the photosynthetic structures were badly destroyed,which could not recover through protecting mechanism by itself.Conclusion: It was showed that M.piperita was able to protect photosynthetic structures by increasing respiration and dissipation when photosynthetic capacity reduced under light UV-B radiation stress.It is demonstrated that M.piperita has high adaptation to light UV-B radiation stress,which is kind of promising medical plant for area with higher UV-B radiation.

关键词(KeyWords): 胡椒薄荷;UV-B辐射胁迫;光合特性;叶绿体超微结构;叶绿素荧光
Mentha piperita;UV-B stress;photosynthetic characteristics;chloroplast ultrastructure;chlorophyll fluorescence

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(30500041);; 三峡库区生态环境教育部重点实验室自由探索基金项目(EF200516)

作者(Author): 吴能表;马红群;胡丽涛;洪鸿;孙金春;张扬欢;戴大临;
WU Nengbiao,MA Hongqun,HU Litao,HONG Hong,SUN Jinchun,ZHANG Yanghuan,DAI Dalin(Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education),School of LifeScience,Southwest China University,Chongqing 400715,China)

Email:

DOI:

参考文献(References):

扩展功能
本文信息
服务与反馈
本文关键词相关文章
本文作者相关文章
中国知网
分享