不同来源的海州香薷和野胡萝卜的铜抗性及铜积累差异  

Differences in Cu resistance and accumulation of Elsholtzia haichouensis Sun and Daucus carota L.populations from Cu mine sites and uncontaminated sites

作　　者：柯文山[1] 熊治廷[2] 谢明吉[1] 熊双莲[2] 黄河[2] 李民敬[2] 

机构地区：[1]湖北大学生命科学学院,武汉430062 [2]武汉大学资源与环境科学学院,武汉430079

出　　处：《环境工程学报》2007年第5期94-100,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(29877021);浙江省自然科学基金资助项目(Y504256)

摘　　要：以来自矿区(铜绿山和赤马山铜矿)和非矿区(红安、武汉严西湖)的海州香薷和野胡萝卜种群为对象,通过土培实验,研究了2种植物的铜抗性及铜吸收积累差异。结果显示,来自矿区的海州香薷和野胡萝卜种群的铜抗性都明显高于非矿区种群,但2种植物种群的铜吸收积累特征明显不同:海州香薷植物吸收的Cu主要集中在根中,但矿区种群吸收积累的铜量明显低于非矿区种群;而野胡萝卜吸收的Cu主要集中在地上部分(地上部分的Cu富集量是根的1.5倍),但积累的铜量在矿区和非矿区种群间没有明显的差异。因此,来自矿区的海州香薷可能进化为铜避性对策,而野胡萝卜的铜抗性与其吸收积累的总量没有明显的关系,但有很好的向地上运输能力。Copper resistance and accumulation were investigated using pot culture experiments with two Daucus carota L. populations and two Elsholtzia haichouensis S. populations, from copper mine sites （Tonglushan and Chimashan copper mines） and uncontaminated field sites （Hongan County and Yanxi Lake of Wuhan city） , respectively. The indices of Cu resistance in E. haichouensis and D. carota populations from Cu mine sites were significantly higher than that from uncontaminated sites. However, Cu accumulation in plant tissues was obviously different between E. haichouensis and D. carota. In E. haichouensis, most of Cu was retained in roots, and Cu concentration in plant was significantly less in Cu mine population than in uncontaminated site population; in D. carota, most of Cu was transported into shoots （Cu concentration of shoots was 1.5 times that of roots）, but no significant difference of total Cu concentration was found between the two populations. The results indicated that the avoiding strategy of Cu might have developed in the Cu resistant population of E. haichouensis. However, no relationship between Cu resistance and total Cu accumulation was found in D. carota population.

关 键 词：海州香薷 野胡萝卜 铜抗性 铜积累 

分 类 号：Q948[生物学—植物学] X171[环境科学与工程—环境科学]