Heat plot representation of a cross-section of a schematic tomato fruit. Visualization of the evolution of the ethylene metabolism for the different tissues for SAM, ACC and MACC content, in vivo ethylene production (Eth), in vitro ACO activity and in vitro ACS activity. Individual colors represent the amount of metabolite or enzyme activity for all maturity stages. Fruit maturity stage annotations: M. Medium sized fruit; MG. Mature Green fruit; BR. Breaker fruit; R. Red fruit; RR + 12. Red Ripe fruit + 12 days of postharvest storage.