A method using HPLC analysis has been used to compare the level of resverat
rol and its derivatives, piceid, pterostilbene and epsilon -viniferin, in g
rapevine berries of three Vitis vinifera varieties. The concentration of th
ese compounds has been evaluated in healthy and Botrytis cinerea infected g
rape clusters, both in natural vineyard conditions and in response to UV el
icitation.