植物学报 ›› 2005, Vol. 22 ›› Issue (增刊): 128-138.

• 专题介绍 • 上一篇    下一篇

沉水植物光合作用的特点与研究进展

苏睿丽 李伟   

  1. (中国科学院武汉植物园水生植物生物学实验室 武汉 430074)
  • 收稿日期:2004-07-05 修回日期:2004-11-26 出版日期:2005-08-10 发布日期:2005-08-10
  • 通讯作者: 李伟
  • 基金资助:
    国家重点基础研究发展规划项目(2002CB412300)、中国科学院知识创新工程重要方向项目(KSCX2-1-10)和中 国科学院武汉植物园所长基金资助

Advances in Research on Photosynthesis of Submerged Macrophytes

SU Rui-Li Li Wei   

  1. (Laboratory of Aquatic Plant Biology, Wuhan Botanical Garden, the Chinese Academy of Sciences, Wuhan 430074)
  • Received:2004-07-05 Revised:2004-11-26 Online:2005-08-10 Published:2005-08-10

摘要: 沉水植物属于高等植物, 由陆生被子植物演化而来, 它们在形态、光合生态生理方面对水下生活环境发生了一系列适应性变化。沉水植物的光合作用受水体中光、温度、pH和无机碳等影响, 本文对此进行了综述。水中低CO2扩散率以及细胞外较厚的扩散层阻碍了沉水植物净碳的吸收, 因此, 沉水植物光合作用速率受到无机碳供应的限制。为获得无机碳, 沉水植物在形态结构和生理生化上表现 一定的特性, 包括薄的叶片层并含有叶绿体以及对HCO3-利用的能力, 拟C4型和CAM型光合代谢途径的选择。这些是沉水植物碳浓缩机制的具体体现。

关键词: 水环境, 沉水植物, 光合作用, 碳浓缩机制

Abstract: The submerged macrophytes are higher-level plants derived from land angiosperms that developed a series of changes in morphology and photosynthetic ecophysiology to readapt to living underwater. This paper summarizes the photosynthesis of submerged macrophytes is affected by factors such as light, temperature, pH and inorganic carbon in the water body. Low rates of CO2 diffusion in water and thick external boundaries hamper the net carbon uptake of submerged macrophyes, so the rate of photosynthesis may often be limited by the supply rate of inorganic carbon. To obtain inorganic carbon, the macrophytes present structural, morphologic,physiologic and biological features, including thin leaf layers with chloroplast, the ability to use HCO3- and the choice of C4-like and CAM photosynthetic metabolism. These features behave like carbon-concentrating mechanisms in the submerged macrophytes.

Key words: Aquatic environment, Submerged macrophytes, Photosynthesis, Carbon concentrating mechanism