Fig. 4.

(a) Content (mean ± SD) of the methionine-derived glucosinolates, 3-methylsulphinylpropyl (3MSP) glucosinolate (glucoiberin) and 4-methylsulphinylbutyl (4MSP) glucosinolate (glucoraphanin), in florets of broccoli (Brassica oleracea var italica) F₁ hybrids grown in Norwich in 2011. Concentrations of 3MSP and 4MSB are significantly higher in HG1, 1639 and 1199 compared to the other broccoli cultivars (P < 0.001). (b) Content (mean ± SD) of tryptophan-derived glucosinolates, OH-indole (OHIND), indole (IND), 1-methoxyindole glucosinolate (1-MIND) and 4-methoxyindole (4-MIND) glucosinolate