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中文摘要：
对石地钱Rebouliahemisphaerica在不同模拟氮沉降条件下的叶绿素荧光动力学特征进行了研究。结果显示加氮对石地钱的光系统Ⅱ产生明显影响，40和60b-hm^-2·a^-1（以N质量计）处理对其光系统Ⅱ产生严重破坏。加氮导致植物单位面积捕获的光能降低，并导致PSⅡ反应中心电子受体侧的氧化还原状态及异质性发生变化，破坏电子传递链，叶片吸收的光能无法在电子传递链中消耗，迫使其大幅提高荧光和热耗散的比率以消耗掉电子传递链中的能量，从而使光系统Ⅱ的性能指数大幅下降。对推动力指数的分析显示，QA^-后面的电子传递对加氮最为敏感。
英文摘要：
Chlorophyll fluorescence transient kinetics of Reboulia hemisphaerica under different simulated nitrogen deposition conditions was studied. The results showed that nitrogen treatments caused changes of chlorophyll fluorescence transient of Reboulia hemisphaerica. N treatments affected PS Ⅱ by reducing the capacity of energy trap of unit area as well as changing the redox states and the heterogeneity of the filling up of the PS Ⅱ acceptor side, destroying the electron flow, especially the electron flow beyond Q2 , as a result, the absorbed energy can not be consumed in the electron flow and have.to be consumed by fluorescence and heat. It can be deduced from the JIP-test that 40 and 60 kg · hm^-2 · a^-1 treatments lead serious damages to Reboulia hemisphaerica.
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