Table 1.
Terpenoid levels (ng mg–1 dw) in Bt and non-Bt cotton as affected by prior infestation with H. virescens in a glasshouse experiment. (Terpenoid concentration (mean ± s.e.; n = 10) in the youngest fully developed leaf of Bt and non-Bt cotton plants that were uninfested or infested with H. virescens (3rd instar) for 7 days. HGQ, hemigossypolone; G, gossypol; H1–H4, heliocide 1–4. Means within one line followed by different letters are significantly different (p ≤ 0.05; Tukey HSD test).)
| terpenoids | ANOVA |
concentration (ng mg–1 dw±s.e.) |
|||||
|---|---|---|---|---|---|---|---|
| d.f. | F | p-value | Bt uninfested | non-Bt uninfested | Bt H. virescens | non-Bt H. virescens | |
| HGQ | 3,36 | 23.7 | <0.001 | 6939±521.5 b | 6764±429.1 b | 5921±661.2 b | 15831±1461.7 a |
| G | 3,36 | 32.3 | <0.001 | 2688±541.3 b | 2014±131.2 b | 2473±161.3 b | 7388±921.0 a |
| H1/H4 | 3,36 | 5.3 | <0.001 | 335±69.9 b | 284±26.6 b | 278±23.3 b | 471±48.8 a |
| H2/H3 | 3,36 | 3.7 | 0.02 | 573±43.2 ab | 642±87.4 ab | 548±63.5 b | 874±75.8 a |