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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。
The photosynthesis and chlorophyll fluorescence were used to study the effects of NaCl stress on photosynthesis and PSII photochemical activity of peppermint. The results showed that the growth and biomass of peppermint showed a concentration-dependent change under NaCl stress. Peppermint was able to grow normally under 100 and 150 mmol / L NaCl stress. With the increase of NaCl concentration, photosynthetic capacity and PSII photochemical activity of peppermint decreased significantly, indicating that the electron transport between QA and QB was blocked. Photosynthesis has the most prominent effects on plant growth and metabolism under NaCl stress. PSII is the most sensitive component of photosynthetic system and plays an important role in the stress of plant photosynthesis on environmental stress.