| Title: | Effect of grape bunch sunlight exposure and UV radiation on phenolics and volatile composition of Vitis vinifera L. cv. Pinot noir wine |
| Author(s): | Song J; Smart R; Wang H; Dambergs B; Sparrow A; Qian MC; |
| Address: | "Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA; College of Enology, Northwest A&F University, Yangling, Shaanxi 712100, China. Smart Viticulture, 31 North Corner, Newlyn, Cornwall TR185JG, UK. College of Enology, Northwest A&F University, Yangling, Shaanxi 712100, China. Australian Wine Research Institute and Tasmanian Institute of Agriculture, PO Box 98, Hobart, Tasmania 7001, Australia. Tasmanian Institute of Agriculture, Perennial Horticulture Centre, PO Box 46, Kings Meadows, 7249 Tasmania, Australia. Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA. Electronic address: Michael.qian@oregonstate.edu" |
| DOI: | 10.1016/j.foodchem.2014.09.150 |
| ISSN/ISBN: | 1873-7072 (Electronic) 0308-8146 (Linking) |
| Abstract: | "The effect of canopy leaf removal and ultraviolet (UV) on Pinot noir grape and wine composition was investigated in this study. Limited basal leaf removal in the fruit zone was conducted, compared to shaded bunches. The UV exposure was controlled using polycarbonate screens to block UV radiation, and acrylic screens to pass the UV. The results showed that bunch sunlight and UV exposure significantly increased the Brix and pH in the grape juice, and increased substantially wine colour density, anthocyanins, total pigment, total phenolics and tannin content. Bunch sunlight and UV exposure affected terpene alcohols, C13-norisprenoids and other volatile composition of the wine differently. Sunlight exposure and UV resulted in increase of nerol, geraniol and citronellol but not linalool. Sunlight exposure slightly increased the concentration of beta-ionone, but the increase was not statistically significant for UV treatment. Neither sunlight nor UV treatment showed any impact on the concentration of beta-damascenone" |
| Keywords: | Anthocyanins/analysis Color Fruit/*chemistry/growth & development/radiation effects Norisoprenoids/analysis Phenols/*analysis *Sunlight Tannins/analysis *Ultraviolet Rays Vitis/*growth & development Volatile Organic Compounds/analysis Wine/*analysis C(13); |
| Notes: | "MedlineSong, Jianqiang Smart, Richard Wang, Hua Dambergs, Bob Sparrow, Angela Qian, Michael C eng Research Support, Non-U.S. Gov't England 2014/12/04 Food Chem. 2015 Apr 15; 173:424-31. doi: 10.1016/j.foodchem.2014.09.150. Epub 2014 Oct 7" |
