Figure 5.

Carbon and nitrogen metabolized throughout tomato fruit development:

(a) total carbon metabolized and sucrose uptake.

(b) glutamine uptake, starch degradation, cell wall degradation and CO₂ fixation by phosphoenolpyruvate carboxylase (V_pepc) and rubisco (V_rbco). Fluxes are expressed in mmol C fruit⁻¹ day⁻¹.