Effects of Extreme Root Restriction on the Nutritional and Flavor Quality, and Sucrose Metabolism of Tomato (Solanum lycopersicum L.)

Summary

Root restriction is suitable for horticultural soilless cultivation characterized by high efficiency and quality in the case of high density and low node order pinching. However, little research is available on the mechanism of root restriction improving the flavor and nutritional quality of tomatoes. We investigated the effects of Extreme Root Restriction (ERR, 750 mL/plant) on the content of metabolites, activity of enzymes, and gene expression level involving sucrose metabolism in different clusters of two tomato types. The fruit diameter and single fruit weight of common tomato at CIII were reduced by 5.6% and 14% under ERR, as a result, the fruit uniformity throughout the whole plant was improved. The ERR enhanced the accumulation of metabolites in tomato fruits, such as soluble sugar