Exogenous Sucrose Confers Low Light Tolerance in Tomato Plants by Increasing Carbon Partitioning from Stems to Leaves

• DOI: 10.1021/acs.jafc.3c05985
• Publication Date: 2023-12-14T21:04:10Z
• Authors: Heng Wang; Hongjun Yu; Lin Chai; Tao Lu; Yang Li; Weijie Jiang; Qiang Li
• Keywords: Hexose

Low light (LL) stress adversely affects plant growth and productivity. The role of exogenous sucrose in enhancing LL tolerance was investigated by spraying on tomato (Solanum lycopersicum L.) leaves. This study employed physiological molecular approaches to identify the underlying mechanisms. Exogenous activated hydrolysis-related enzyme activity upregulated genes encoding hexose transporters mature leaves, decreasing endogenous levels promoting unloading during LL. Stem-related associated with synthesis transport were also upregulated, phloem loading. Furthermore, from stems sink forming a feed-forward loop sustain flow led increased nonstructural carbohydrates (NSCs), improved energy metabolism, enhanced protein ultimately boosting photosynthesis fruit yield after recovery. These findings highlight how enhances tomatoes increasing NSCs