Non-targeted analysis of spatial metabolite composition in strawberry (Fragaria × ananassa) flowers

The metabolite composition of strawberry floral organs (i.e. sepals, petals, stamen, pistil and receptacle) has been studied by UPLC-qTOF-MS and MS/MS analysis. Various classes of metabolites, including ellagitannins, proanthocyanidins, flavonols, terpenoids, and spermidine derivatives were detected that showed differential accumulation between the floral organs. These results allude to spatially-restricted production of secondary metabolite classes and specialized derivatives in flowers that take part in implementing the unique program of individual organs in the floral life cycle.