Über die Biogenese von Aromastoffen bei Pflanzen und Früchten, XVII* Anabole Leistung von Erdbeerfruchtgewebe bei der Biosynthese von Aromastoffen / On the Biogenesis of Aroma Compounds in Plants and Fruits, XVII * Anabolic Properties of Strawberry Fruit Tissue for the Biosynthesis of Aroma Compounds

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Abstract
Slices from ripe strawberry fruit (in shape of segments) metabolize exogenous ʟ-alanine, acetate, pyruvate, n-butyrate, 2-ketovalerianate, n-butanal, n-hexanoate or d,l-mevalonic acid-δ-lactone to yield fruit-typical aroma compounds and some of them to considerable extent. Employing standard-controlled aroma separation by liquid-liquid-extraction, as well as prefrac­tionation on silica gel, the aroma components were determined by GC and GC-MS. Alkyldonors were converted more quickly and selectively than acyldonors, the former resulting in twenty-to thirtyfold increase in some of the concentrations of fruit-esters under specific conditions. The increase in ester biosynthesis ʟ-alanine is directly proportional to the concen­ tration of substrate up to 3 mmol/1. After addition of the above mentioned precursors the con­ centration of (+)-nerolidol, a terpenoid compound o f strawberry aroma, is increased.

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