沉水植物光合作用的特点与研究进展

被引:58
作者
苏睿丽
李伟
机构
[1] 中国科学院武汉植物园水生植物生物学实验室
关键词
水环境; 沉水植物; 光合作用; 碳浓缩机制;
D O I
暂无
中图分类号
Q948.8 [水生植物学];
学科分类号
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。
引用
收藏
页码:128 / 138
页数:11
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