Fig. 3

There is no difference in final glucosinolate concentrations between freeze drying or direct extraction in −20 °C methanol. B. napus leaves were cut in half and frozen. One half was freeze dried prior to glucosinolate extraction, the other half was extracted directly into −20 °C methanol (n = 12; paired t test, p = 0.15; R² = 0.96). The dashed line represents equivalence of x and y