Table 1.

Removal of TCE from hydroponic solution in 1 week by poplar cuttings in sealed vials

Plant line	% removal	Rate*
Unplanted	0.8 ± 1.1	0.14 ± 0.11
KH200-61	2.5 ± 0.4	0.38 ± 2.81
CYP2E1 line 4	90.9 ± 15.7	18.6 ± 2.50
CYP2E1 line 8	51.4 ± 6.2	12.3 ± 2.81
CYP2E1 line 20	79.0 ± 29.6	12.5 ± 5.76
CYP2E1 line 78	87.2 ± 11.1	20.3 ± 4.60

Cuttings in triplicate were dosed with 708 μg of TCE in sealed 40-ml VOA vials. TCE-dosed, unplanted vials were used as a control. After 1 week of TCE exposure, plants were weighed, and the hydroponic solution was sampled. TCE was extracted by using a salt-hexane solution and analyzed by GC-ECD. Percent removal was calculated by comparing total TCE concentration after 4 h and after 1 week.

*Micrograms of TCE per day per gram of fresh weight ± SEM.