The effects of exposure of Canadian waterweed (Elodea canadensis) to a 50 Hz electric field on growth and trace metals content should be investigated.
A total of 560 pieces of Elodea canadensis were allocated to one exposure group and one control group, respectively.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
50 Hz
Exposure duration:
continuously for 7 days
|
|
| Frequency | 50 Hz |
|---|---|
| Type | |
| Exposure duration | continuously for 7 days |
| Exposure source |
|
|---|---|
| Chamber | fourteen aquariums (50 x 23 x 10 cm3) filled with 40 pieces of Elodea canadensis and 6 L nutrient solution, each; covered with transparent stretch film |
| Setup | aquariums were placed between the plates of the plate condenser (plates above and below) to produce a homogeneous electric field; water temperature was maintained at 21°C ± 2°C and a circadian rhythm of 14 to 10 hours at constant light was followed |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 54 kV/m | - | measured | - | ± 2 kV/m |
The growth of exposed plants was slightly but not significantly increased compared to plants of the control group.
The contents of all trace metals were significantly different in exposed plants compared to the control group: iron, manganese and nickel were increased, lead and zinc decreased.
The authors conclude that exposure to a 50 Hz electric field could alter the content of trace metals in the Canadian waterweed (Elodea canadensis).
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