NaCl胁迫对椒样薄荷光合作用和PSII光化学活性的影响  

Impacts of NaCl stress on photosynthesis and PSⅡ photochemical activity of peppermint( Mentha piperita L. )

作　　者：李哲[1] 吴晓青[1] 赵晓燕[1] 魏艳丽[1] 李纪顺[1] 杨合同[1,2] 

机构地区：[1]山东省科学院生物技术研究中心,山东济南250014 [2]山东理工大学生命科学学院,山东淄博250049

出　　处：《山东科学》2014年第1期27-33,共7页Shandong Science

基　　金：国际科技合作项目(2007DFA30630);国际科技合作项目(2011DFA30990);山东省科学院青年科学基金(2013QN012);山东省科技发展计划项目(2010GNC10947)

摘　　要：利用光合作用测定仪和叶绿素荧光仪研究了不同浓度NaCl胁迫对椒样薄荷光合作用和PSII光化学活性的影响。结果表明,在NaCl胁迫下,椒样薄荷的生长和生物量呈现出了浓度依赖性的变化。在100和150 mmol/L NaCl胁迫下,椒样薄荷能够正常生长。随着NaCl处理浓度的提高,椒样薄荷光合能力和PSII光化学活性显著下降,表明QA到QB之间的电子传递被阻断。光合作用对NaCl胁迫下植物生长和代谢的影响最为突出,PSII是光合系统中最敏感的组分,在植物光合系统对环境胁迫的应激中起着重要的作用。We employed portable photosynthesis dectector and chlorophyll fluorometer to address the impacts of different concentrations of NaCl stress on photosynthesis and PSⅡ photochemical activity of peppermint.Results show that concentration-dependent variation exhibits for the growth and biomass of peppermint under NaCl stress.Peppermint can normally grow under 100 and 1.50 mmol/L NaCl stress.Photosynthesis and PSⅡ photochemical activity of peppermint are significantly decrease and electron transfer between QA and QB is inhibited with the increase of NaCl concentration.The impact of photosynthesis on plant growth and metabolism is quite significant under NaCl stress.PSⅡ is the most sensitive component in a photosynthetic system,and so important in the response of photoynthesis to environmental stress.

关 键 词：椒样薄荷 NACL胁迫 光合作用 PSⅡ光化学活性 

分 类 号：Q945.78[生物学—植物学]