旱柳无性系对2,4-二氯苯酚的耐性、去除和吸收

对4个旱柳（Sailx matsudana）无性系8，10，18和22号进行了水培试验，研究了96h后旱柳对水中2,4-二氯苯酚（2,4-DCP）的去除和吸收积累能力. 结果表明:旱柳可促进2,4-DCP降解，在96 h内4个旱柳无性系8，10，18和22号对20 mg/L的2,4-DCP去除率分别为56.63%，59.85%，55.17%和56.90%. 将4个旱柳无性系分别曝露在10，20和30 mg/L的2,4-DCP环境中，随着ρ（2,4-DCP）的增大，根系和地上部分中的w（2,4-DCP）增加，且根>茎叶；10号无性系地上部分未检测出2,4-DCP且其根系中的w（2,4-DCP）显著低于其他无性系；22号根系和地上部分的w（2,4-DCP）均显著高于其他无性系.水溶液中ρ（2,4-DCP）小于20 mg/L时，2,4-DCP对旱柳生长无显著抑制作用. 不同旱柳无性系对2,4-DCP均具有一定的吸收蓄积能力. 

Tolerance, Removal, Uptake and Accumulation of 2,4-Dichlorophenoland in Salix matsudana Clones

Four Salix matsudana clones Number 8, 10，18 and 22 were used to be tested in water for 96 h. The eliminate efficiency, uptake and accumulation of Salix matsudana to 2,4-DCP in water solution were studied. The results indicated that: Salix matsudana clones Number 8, 10, 18 and 22 promoted 2,4-DCP degradation significantly compared with the control, removing 56.63%, 59.85%, 55.17% and 56.90%of 20 mg/L 2,4-DCP in 96 h, respectively. Four Salix matsudana cloneswere exposed to 2,4-DCP at 10, 20 and 30 mg/L mass concentrations. 2,4-DCP in root, shoot increased with initial 2,4-DCP mass concentration in solution. The 2,4-DCP contentin different parts of plant is in the order of root > shoot. 2,4-DCP was not detected in Number 10 clone's shoot and content in root was lower than other clonesmostly. The content of 2,4-DCP in root and shoot in Number 22 was larger than other clones. Salix matsudana had not been distinctly restrained when the 2,4-DCP mass concentration was under 20 mg/L. Sailx matsudana had its special characteristic and some uptake and accumulation capacity for 2,4-Dichlorophenol pollution inthe environment.