Transformation of Terpenoids in Grape Must by Botrytis cinerea |
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Authors: | Jun-ichi Shimizu Mikio Uehara Masazumi Watanabe |
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Institution: | Central Research Laboratories of Kikkoman Corporation, 399-Noda, Noda, Chiba 278, Japan |
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Abstract: | Experiments were done to investigate the volatile components in botrytized grape must and transformation of terpenoids in terpene-supplemented grape must by Botrytis cinerea. Twenty-eight compounds were 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 some other monoterpenes. |
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