Table II.
Lignin deposition in cucurbits
| Treatment | 1 d | 2 d | 3 d | 4 d | 5 d |
|---|---|---|---|---|---|
| cv Sugar Baby (susceptible) | |||||
| Treatment 1 | − | − | − | − | − |
| Treatment 2 | − | − | − | + | + |
| Treatment 3 | − | + | ++ | +++ | ++++ |
| Challenge A | − | − | +++ | ++++ | +++++ |
| cv Jubilee (resistant) | |||||
| Treatment 1 | − | − | − | − | − |
| Treatment 2 | − | − | + | + | + |
| Treatment 3 | + | ++ | +++ | ++++ | +++++ |
| Challenge A | − | − | ++ | +++ | ++++ |
| cv Marketmore (susceptible) | |||||
| Treatment 1 | − | − | − | − | − |
| Treatment 2 | − | − | + | + | + |
| Treatment 3 | − | + | ++ | +++ | ++++ |
| cv Challenge A | − | − | +++ | ++++ | +++++ |
| cv Pepino (resistant) | |||||
| Treatment 1 | − | − | − | − | − |
| Treatment 2 | − | − | + | + | + |
| Treatment 3 | − | + | +++ | ++++ | +++++ |
| Challenge A | − | − | ++ | +++ | ++++ |
The data presented represent the average levels of lignin deposition from 30 pooled plant stems of equal size and age (variations between plant stems were negligible). Lignin deposition was measured on a qualitative basis and ranged from absent (−), basal (+), low (++), moderate (+++), moderately high (++++), to high (+++++) levels.