【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。更多还原

【Abstract】 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 150 mmol /L NaCl stress. Photosynthesis and PSII photochemical activity of peppermint are significantly decrease and electron transfer between QAand QBis 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.更多还原