Gene expression (relative copies) profiles of ACO1 (A), ACS2 (B), MTN (C), MTK (D), ARD1 (E), and ARD2 (F) for red tomatoes harvested and stored off the plant (dark gray) and red tomatoes kept on the plant (light gray) for 14 d. Error bars represent the sd of the mean of six biological replicates. Statistical significant differences (P < 0.05) between attached and detached fruit are indicated with an asterisk.