酸模、小头蓼和戟叶酸模对铜的耐性和积累特性研究  

Cu Tolerance and Accumulation of Rumex acetosa Linn, Polygonum microcephalum D. Don and Rumex hastatus D. Don

作　　者：李红艳[1] 唐世荣[1] 郑洁敏[1] 

机构地区：[1]浙江大学原子核农业科学研究所,杭州310029

出　　处：《科技通报》2005年第4期480-484,共5页Bulletin of Science and Technology

基　　金：国家重点基础研究发展规划项目(G1999011800);浙江省自然科学基金资助项目成员之一

摘　　要：种子萌发实验、砂培和土培试验结果表明,酸模、小头蓼和戟叶酸模对Cu具有较强的耐性和蓄积能力,在染Cu环境中能正常生长。砂培条件下,这些植物能在7 mg·L-1Cu处理的营养液中生长并蓄积Cu。小头蓼根部含Cu量明显高于酸模和戟叶酸模,前者平均含Cu量为(4765.06±484.28)mg·kg-1, 后两者分别为(1749.23±154.98)mg·kg-1、(890.26±57.21)mg·kg-1;茎叶部含Cu量也以小头蓼较高,平均为(214.04±16.31)mg·k-1,戟叶酸模和酸模较低,分别为(34.59±4.94)mg·kg-1、(27.59±5.32)mg·kg-1。土培试验也证实,酸模和戟叶酸模均能蓄积一定的Cu。据此推测,酸模、小头蓼和戟叶酸模均可作为植物修复铜污染土壤的先锋物种。Cu accumulation of three Polygonaceae under different Cu treatments were examined with seed germination, sand culture and soil culture. R. acetosa, P. microcephalum and R. hastatus were found to have comparatively stronger a-bility to tolerate and accumulate copper and to maintain normal growth in Cu-contaminated environment. Sand culture experimental results show that they could survive in 7 mg**L-1 Cu treated nutrient solution and accumulate copper to a certain extent. P. microcephalum had higher root copper concentration than R. acetosa and R. hastatus. The former has root copper concentrations averaging(4765.06±484.28)mg·kg-1 while the latter two have root copper concentrations averaging (1749.23±154.98)mg·kg-1 and (890.26±57.21) mg·kg-1 respectively. P. microcephalum also had higher shoot copper concentration averaging (214.04±16.31) mg·kg-1 than R. hastatus and R. acetosa which contain average shoot copper concentration (27.59±5.32) mg·kg-1(34.59±4.94) mg·kg-1, respectively. Soil culture experiments also demonstrated that R. acetosa and R. hastatus can accumulate some amount of copper. These results indicated that three Polygonaceae can serve as pioneer species for phytoremediation of copper-contaminated soils.

关 键 词：生物物理学 酸模 小头蓼 戟叶酸模 铜 吸收 

分 类 号：X591[环境科学与工程—环境工程]