Transformation of terpenoids in grape must by Botrytis cinerea.

Experiments were done to investigate the volatile componentsin botrytized grape must and transformation of terpenoids in terpene-supplemented grape must by Botrytis cinerea.Twenty-eight compoundswere identified in the volatile concentrate of botrytized must with a combined gas chromatograph-mass spectrometer.No terpenoids were detected in the concentrate.Linalool or terpinen-4-ol decreased a lot when Botrytis cinerea was cultured in the must with these terpenes for 15 days.In linalool-supplemented botrytized must 9 identified and 3 unidentified terpenes were found, while only geranial was detected in terpinen-4-ol-supplemented botrytized must.Botrytis cinerea did not produce terpenoid in grape must without terpenes, but transformed linalool added to grape must into someother monoterpenes.Mono and sesquiterpenoids are primarily plant products and are well known as characteristic components of a variety of essential oils.The presence of these compounds in