Involved in the production of volatile organic compounds (VOCs), including floral volatile benzenoids and phenylpropanoids (FVBP), in flowers of fragrant cultivars (e.g. cv. Mitchell and cv. V26), scent attracting pollinators (e.g. the night-active hawkmoth pollinator Manduca sexta) (PubMed:24815009). Catalyzes an aldol-like condensation reaction between phosphoenolpyruvate (PEP) and D-erythrose 4-phosphate (E4P) to generate 3-deoxy-D-arabino-heptulosonate 7-phosphate (DAH7P) and inorganic phosphate (By similarity). D-erythrose 4-phosphate + H2O + phosphoenolpyruvate = 7-phospho-2-dehydro-3-deoxy-D-arabino-heptonate + phosphate Binds 1 divalent metal cation per subunit that could be manganese. Metabolic intermediate biosynthesis; chorismate biosynthesis; chorismate from D-erythrose 4-phosphate and phosphoenolpyruvate: step 1/7. Homodimer. Mostly expressed in flowers, especially in petal limbs and tubes, and, to a lower extent, in roots, stems, stigmas, anthers, leaves and sepals. During floral development, accumulates to highest levels during open flower stages. Triggered by EOBI in flowers. Reduced floral volatile benzenoids and phenylpropanoids (FVBP) emission. Belongs to the class-II DAHP synthase family.