Table I.
COMT activity in the developing xylem of transgenic poplars with sense COMT constructs relative to the control level
| Culture No. | Poplar Line (COMT Activity Expressed as Percent of the Corresponding Control Level)
|
|||
|---|---|---|---|---|
| 70SOMT-1 | 70SOMT-3 | EuSOMT-1 | EuSOMT-2 | |
| First culture | 164 | 2 | 186 | 240 |
| Second culture | ||||
| Tree 1 | 102 | 0.5 | 153 | 85 |
| Tree 2 | 56 | 1 | 98 | 96 |
| Tree 3 | 83 | 3 | 186 | 40 |
Caffeic acid was used as the substrate. The assays were run in summer and for two different series of 6-month-old poplars grown in the greenhouse in 1998 and in 1999.