Responses of Photosystem Ⅱ of  Reboulia hemisphaerica  to Nitrogen Deposition  

LEI Chunyi; Liu Weiqiu; LIU Binyang; ZHANG Yishun

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Responses of Photosystem Ⅱ of Reboulia hemisphaerica to Nitrogen Deposition 

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- Responses of Photosystem Ⅱ of Reboulia hemisphaerica to Nitrogen Deposition 
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 49, Issue 1, Pages: 72-75(2010)
- 作者机构：
  
  1. ．广东黑石顶省级自然保护区,广东,肇庆,526536
  2. 2．中山大学生命学科学学院,广东,广州,510275
  3. 3．暨南大学生态学系,广东,广州,510632
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010，
  
  Published Online：25 January 2010，
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LEI Chunyi, Liu Weiqiu, LIU Binyang, et al. Responses of Photosystem Ⅱ of Reboulia hemisphaerica to Nitrogen Deposition . [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(1):72-75(2010)
DOI：

LEI Chunyi, Liu Weiqiu, LIU Binyang, et al. Responses of Photosystem Ⅱ of Reboulia hemisphaerica to Nitrogen Deposition . [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(1):72-75(2010) DOI：

摘要

对石地钱 Reboulia hemisphaerica 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60 kg·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，Q-A后面的电子传递对加氮最为敏感。

Abstract

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 Q-A

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.

关键词

氮沉降叶绿素荧光诱导曲线石地钱 Reboulia hemisphaerica

Keywords

nitrogen depositionchlorophyll fluorescence transient kinetics〖WTBX〗Reboulia hemisphaerica

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