Effects of Comparative Metabolism on Tomato Fruit Quality under Different Levels of Root Restriction

In a soilless culture (perlite substrate), root restriction cannot only reduce production costs but also improve fruit quality. Therefore, this study used different levels of [T1: 0.5 L, T2: 4 nonrestriction treatment (CK): 35 L] on tomatoes to explore their impact Results showed that total soluble solids (TSS), glucose, fructose, and sucrose contents were increased, whereas L-tryptophan, L-tyrosine, titratable acidity decreased under two treatments. Meanwhile, promoted the accumulation phenylalanine proline. For lycopene flavonoid biosynthesis (prunin, naringin, naringenin), groups significantly higher than those in control group. Overall, T1 T2 had better effect CK treatment. This provided an idea for improving substrate use efficiency tomato