109 NOTICE, CA, 24. February 2021… The American Society of Oenology and Viticulture (ASEV) has selected the winners of the 2021 Best Work Competition. The authors received a plaque and cash prize and will present their work at the national virtual ASEV 2021 conference, which will be held from 21 to 24. The month of June will take place. Both documents are highlighted at www.ajevonline.org and are available free of charge.

Best Work in Viticulture 2021, Soil Temperature to Veraison Alters Grapevine Carbon Partitioning, Xylem Sap Hormones and Fruit Set by Stuart C. Field of the Nelson Marlborough Institute of Technology in New Zealand, Jason P. Smith and Bruno P. Holzapfel of Charles Sturt University in Australia, and Erin N. Morrison and R.D. Neil Emery of Trent University in Canada, studied environmental influences on grapevines and the physiological regulation of acclimation. The authors studied the effect of soil temperature (14˚C or 24˚C) between flowering and port on growth, non-structural carbohydrates, cytokinins, abscisic acid and leaf function of Shiraz vines in pot. They concluded that soil temperature has a significant effect on vine growth and that the response is largely mediated by the effect of temperature on the mobilization of reserve carbohydrates from the roots.

For the best oenological article of 2021, the ASEV chose the determination of molecular sulfur dioxide and true free sulfur dioxide in wine : Comparison of headspace and traditional methods, by Todd Jenkins, Patricia A. Howe, and Andrew Waterhouse of the University of California, Davis, and Gavin L. Sachs of Cornell University. The authors developed a new analytical method for true free SO2 and compared it to traditional SO2 measurement methods. They concluded that their new GC method, which measures the SO2 concentration in the free space of wine samples, is less likely to overestimate free SO2 concentrations in red wine than conventional methods and provides consistent results at a low operating cost.

Each year, the ASEV Best Paper Awards Committee reviews all manuscripts published in the American Journal of Enology and Viticulture (AJEV) during the previous year and selects one article in viticulture and one in oenology that demonstrate outstanding research and significant contributions to the field. Current members of the Paper Awards Committee are Keith Strigler (chair) of E. & J. Gallo Winery, California; Cassandra Bent of Domaine Chandon, California; Bob Coleman of Treasury Wine Estates, California; Lindsay Jordan of Constellation Brands, California; Kevin Ker of Brock University, Canada; Scott Colt of E. Kozel. & J. Gallo Winery, California; Misha Kwasniewski of Penn State University, University Park; Russell Moss of Cornell University, New York; Merrillark Padgett-Johnson of Santa Rosa College, California; Joe Shirley of Sutter Home, California; and Dave Sorokowski, wine consultant, California.

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