樟树对14CO2的吸收和积累-中国环境科学.pdf

中国环境科学 2010,30(12) ：1690~1694 China Environmental Science 樟树对 14CO2 的吸收和积累 史建君* (浙江理工大学理学院,浙江 杭州 310018) 摘要：为了探明 14CO 在环境中的行为,采用同位素示踪技术研究了樟树对 14CO 的吸收和积累动 ,并探讨了樟树作为监测大气 14CO 污 2 2 2 染指示植物的可能性和优越性.结果表明,通过叶片光合作用从空气中吸收的 14CO2 会在樟树叶片中积累,检测到的 14C 比活度数值较大,表 明空气中的 14CO2 易于通过叶片的光合作用而进入樟树叶片组织中;在污染前期 14CO2 主要被新叶组织中吸收,后期主要积累在老叶中,反 映出新叶对空气 14CO2 污染比较敏感,而老叶积累效应明显.樟树叶片的这一特性可用于监测大气 14CO2 污染. 关键词：樟树；14CO ；吸收；积累 2 中图分类号：X591 文献标识码：A 文章编号：1000-6923(2010)12-1690-05 14 14 * Uptake CO from air and accumulation of C in camphor. SHI Jian-jun (Institute of Science, Zhejiang Sci-Tech 2 University, Hangzhou 310018, China). China Environmental Science, 2010,30(12)：1690~1694 Abstract ：Uptake 14CO2 from air and accumulation of 14C in the camphor were studied by using the isotope-tracer techniques, which was used to get a better understanding of the environmental behavior of 14CO . And the possibility and 2 superiority of camphor used as the indicator plant in the supervisor of 14CO air pollution were discussed. The 14CO , 2 2 which was uptaken from the air by the leaf photosynthesis, would accumulate in the leaves of camphor. 14C specific activity was detected high, which demonstrated 14CO2 in the air easily got into leaf tissue of the camphor through photosynthesis. During the early stage o