Figure 3.

A and B, Changes in the 19-kD TI activities in laminae of young leaves of oilseed rape supplied (control; ▪) or not (N starvation; □) with nitrate between 14 and 28 d. C and D, Changes in the 19-kD TI activities in laminae of young leaves of oilseed rape treated (□) or not (▪) with MeJA during 0, 1, 3, and 7 d of treatment. Detection of a 19-kD protein possessing a TI activity was obtained after SDS-PAGE of soluble proteins (125 μg of proteins loaded per lane; A and C). TI activity corresponds to specific activity and is expressed as integrated intensity per milligram of soluble proteins. Vertical bars indicate ±se of the mean (n = 3) and fit within the plot if not visible.