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植物研究 ›› 2017, Vol. 37 ›› Issue (1): 45-51.doi: 10.7525/j.issn.1673-5102.2017.01.007

• 论文 • 上一篇    下一篇

CO2浓度升高对苦草(Vallisneria natans)叶绿素荧光特性的影响

韩燕青1,2, 刘鑫2, 胡维平2, 张平究1, 邓建才2, 成泽霖3   

  1. 1. 安徽师范大学国土资源与旅游学院, 芜湖 241000;
    2. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;
    3. 上海海洋大学水产与生命学院, 上海 201306
  • 收稿日期:2016-09-29 出版日期:2017-01-15 发布日期:2017-03-06
  • 通讯作者: 邓建才,E-mail:jcdeng@niglas.ac.cn E-mail:jcdeng@niglas.ac.cn
  • 作者简介:韩燕青(1991-),男,硕士研究生,主要从事水生植物生态学方面研究。
  • 基金资助:
    国家自然科学基金(41271213,41230853);国家水体污染控制与治理科技重大专项(2014ZX07101-011);中国科学院重点部署项目(KZZD-EW-10)

Effects of CO2 Enrichment on Chlorophyll Fluorescence Characteristics of Vallisneria natans

HAN Yan-Qing1,2, LIU Xin2, HU Wei-Ping2, ZHANG Ping-Jiu1, DENG Jian-Cai2, CHENG Ze-Lin3   

  1. 1. College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241000;
    2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008;
    3. College of Fisheries and life science, Shanghai Ocean University, Shanghai 201306
  • Received:2016-09-29 Online:2017-01-15 Published:2017-03-06
  • Supported by:
    This research is supported by National Natural Science Foundation(41271213, 41230853);State Water Pollution Control and Management Technology Major Projects(2014ZX07101-011);Chinese Academy of Sciences Key Deployment Project(KZZD-EW-10)

摘要: 为了探究大气CO2升高对沉水植物光合生理的影响,利用便携式植物效率分析仪(Handy PEA),在无损的情况下测定不同CO2浓度处理下的苦草(Vallisneria natans)叶绿素荧光诱导曲线,并采用JIP-test分析方法分析数据,研究CO2浓度对苦草叶片叶绿素荧光特性的影响。结果表明在实验进行60 d后,与对照相比,高CO2浓度处理下的苦草叶片PSⅡ反应中心受体侧荧光参数VjMo显著升高,SmψoφEo显著降低,叶片电子传递能力减弱;K相相对可变荧光Wk显著提高,PSⅡ反应中心供体侧放氧复合体OEC受到伤害;ABS/RC、DIo/RC、TRo/RC、DIo/CSo显著升高,ETo/RC、REo/RC、ETo/CSoREo/CSo显著降低,苦草叶片用于热耗散的能量显著增加,导致用于电子传递及传递到电子链末端的能量显著减少;性能参数Fv/FmPIabs显著降低,苦草叶片PSⅡ潜在活性和光合作用原初反应过程受到抑制。以上结果表明,在长期高CO2浓度处理下,苦草叶片光合机构功能受到抑制,PSⅡ反应中心活性降低,光合功能下调,发生光适应现象。

关键词: 苦草, CO2浓度升高, 光系统Ⅱ, 叶绿素荧光

Abstract: To explore the effects of elevated atmospheric CO2 on photosynthetic physiology of submerged plant, we studied the effects of high concentrations of CO2 on chlorophyll fluorescence characteristics of Vallisneria natans by measuring the rapid fluorescence induction kinetics curves(OJIP) of the leaves with Plant Efficiency Analyzer and analyzing with JIP-test. The Vj, Mo of V.natans were significantly increased and Sm, ψo and φEo were significantly reduced after 60 days, and the electron transfer diminished capacity of V.natans was decreased compared with the control; the donor side of PSⅡ reaction center was hurt because the Wk was increased; the specific activity parameters ABS/RC, DIo/RC, TRo/RC, DIo/CSo were significantly increased, ETo/RC, REo/RC, ETo/CSo, REo/CSo significantly decreased, and the energy for heat dissipation significant increased lead to the energy of electron transfer and electron transfer chain end were significantly decreased. Compared with the control, the performance parameters Fv/Fm and PIabs were also decreased. Therefore, the long-term high concentrations of CO2 suppressed photosynthetic apparatus state, decreased PSⅡreaction center activity and down regulated photosynthetic function of V.natans, and the V.natans appeared light acclimation.

Key words: Vallisneria natans, CO2 enrichment, PSⅡ, chlorophyll fluorescence

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