大白菜对铅积累与转运的品种差异研究.pdfVIP

中国环境科学 2009,29(1) ：63~67 China Environmental Science 大白菜对铅积累与转运的品种差异研究 1,2 1,3* 1,2 1 刘维涛 ,周启星 ,孙约兵 ,刘 睿 (1. 中国科学院沈阳应用生态研究所,陆地生态过程重点实验室, 辽宁 沈阳 110016 ；2. 中国科学院研究生院, 北京 100049 ；3.南开大学环境科学与工程学院,环境污染过程与基准教育部 重点实验室,天津 300071) 摘要：采用盆栽试验,研究了 15 种大白菜对铅(Pb)积累与转运的品种差异, 以期筛选具有Pb 低积累潜力的大白菜品种.结果表明,15 种大白 菜地上部 Pb 含量存在显著品种差异(P0.05), 在 3 个浓度(0,300,500mg/kg)Pb 处理下, 大白菜地上部的 Pb 含量范围分别为 0.03~0.20,0.13~0.48,0.64~1.73mg/kg. Pb 在 15 种大白菜品种的转运系数均0.40,且差异显著(P0.05),表明大白菜体内的Pb 主要积累在根部 而非地上部.不同 Pb 处理下 15 种大白菜品种地上部生物量的变化总体上差异不显著(P0.05),表明大白菜对 Pb 毒害具有一定的耐受性.根 据地上部 Pb 含量、转运系数和 Pb 耐性等指标评价,第一春宝可视为具有 Pb 低积累潜力的大白菜品种. 关键词：大白菜；铅；积累与转运；品种差异 中图分类号：X171.5 文献标识码：A 文章编号：1000-6923(2009)01-0063-05 Variety difference of lead accumulation and translocation in Chinese cabbage (Brassica peckinensis L.). LIU Wei-tao1,2 1,3* 1,2 1 , ZHOU Qi-xing , SUN Yue-bing , LIU Rui (1. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China；2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China ；3. Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China). China Environmental Science, 2009,29(1)：63~67 Abstract ：Pot-culture experiments were carried out to study variety difference of lead accumulation and translocation in 15 Chinese cabbage cultivars, which aimed to screen out Chinese cabbage cultivars with low Pb accumulation. There was significant variety difference (P0.05) in shoot Pb concentrations among 15 Chinese cabbage cultivars under three treatments (0, 300, 500mg/kg), which ranging from 0