植物近期光合碳分配及转化

被引:20
作者
王智平
陈全胜
不详
机构
[1] 中国科学院植物研究所植被数量生态学重点实验室
[2] 中国科学院植物研究所植被数量生态学重点实验室 北京
[3] 北京
关键词
近期光合碳; CO2和CH4; 根际; C3、C4植物; 同位素技术;
D O I
暂无
中图分类号
Q945.11 [光合作用、碳素同化作用];
学科分类号
摘要
碳(C)既是生命基础元素,又是与大气环境及全球气候变化密切相关的基本成分。近期(系指数星期的时间尺度,约相当于植物某一生长期)光合C是“大气_植物_土壤”系统C循环的重要组成部分;定量近期光合C在植物组织、土壤和呼吸损失的分配,对于理解全球C循环是必不可少的。植物近期光合C分结构性C和代谢C;由于代谢C周转快和结构性C尚未及时形成有机质等,近期光合C容易被忽视。应用同位素技术,可从多方面研究植物近期光合C分配及转化特征。这些方面主要包括根际区光合C代谢、近期光合C对CO2和CH4排放的贡献、C3植物与C4植物对全球C循环模式的作用、人类活动对近期光合C分配的影响等。我国鲜见植物近期光合C分配及转化的研究,开展此方面的工作,对我国从生命代谢角度研究C循环具有积极的推动作用。
引用
收藏
页码:845 / 850
页数:6
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