Changes in pyridine nucleotide level in tomato fruits of NTRC-RNAi lines in comparison to the wild type (WT). The levels of NADP+, NADPH, NAD+, and NADH (A and B) and the ratios of NADPH to NADP+ and NADH to NAD+ (C and D) were measured in fruits harvested at 35 (A and C) and 65 DAF (B and D). Results are the mean ± se from six biological replicates. Statistical analysis used ANOVA with Dunnett’s test (*P < 0.05, compared to the wild type). FW, fresh weight