RT Journal Article SR Electronic T1 Impact of Harvest Timing on the Concentration of 3-Mercaptohexan-1-ol Precursors in Vitis vinifera Berries JF American Journal of Enology and Viticulture JO Am. J. Enol. Vitic. FD American Society for Enology and Viticulture SP ajev.2012.12051 DO 10.5344/ajev.2012.12051 A1 Hironori Kobayashi A1 Shuhei Matsuyama A1 Hideki Takase A1 Kanako Sasaki A1 Shunji Suzuki A1 Ryoji Takata A1 Hiroshi Saito YR 2012 UL http://www.ajevonline.org/content/early/2012/08/16/ajev.2012.12051.abstract AB We analyzed the effect of harvest timing on the concentration of flavor precursor-3-mercaptohexan-1-ol (flavor precursor-3MH) in Vitis vinifera grape berries. The accumulation of flavor precursor-3MH in Chardonnay grape increased around early morning and decreased during the day. The daily fluctuation of flavor precursor-3MH accumulation in grape was common to several grape cultivars irrespective of the sampling year. These results suggested that early morning harvest might yield higher concentrations of 3MH and 3-mercaptohexyl acetate in wines than daytime harvest. These findings could contribute to improving viticultural and enological practices with the aim of producing aromatic wines.