Modification of OsSUT1 gene expression modulates the salt response of rice Oryza sativa cv. Taipei 309

▶ Rice roots show a metabolic depletion syndrome upon exposure to NaCl during vegetative growth. ▶ 30 primary metabolites are involved including sucrose, glucose, and fructose. ▶ Reduction of OsSUT1 expression improved plant performance and root sucrose levels under stress. ▶ Breeding towards salt tolerance should aim for intermediate reduction of OsSUT1 gene expression. ▶ Genetic manipulation of OsSUT1 must avoid interference with grain filling and seed germination.