Summary Sugarcane plants were developed that produce the sucrose isomers trehalulose and isomaltulose through expression of a vacuole‐targeted trehalulose synthase modified from the gene in ‘Pseudomonas mesoacidophila MX‐45’ and controlled by the maize ubiquitin (Ubi‐1) promoter. Trehalulose concentration in juice increased with internode maturity, reaching about 600 mm, with near‐complete conversion of sucrose in the most mature internodes. Plants remained vigorous, and trehalulose production in selected lines was retained over multiple vegetative generations under glasshouse and field conditions.
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