Deficit irrigation strategies for improving fruit ripening and grape aromatics in Okanagan Valley

加拿大葡萄酒行业在加拿大雇佣了3.1万多名员工，欢迎300多万人 每年吸引游客，创造近68亿美元的收入。不列颠哥伦比亚省(BC)是两个 加拿大主要的葡萄种植区。教堂和州立葡萄酒(CSW)酒庄位于奥卡纳根 河谷，以优质葡萄酒的生产为导向。 教堂和州立葡萄酒厂管理着大约120英亩的葡萄园，所有这些葡萄园都是灌溉的 每天都有。奥卡纳根山谷葡萄园需要频繁灌溉，因为在过去的几年里降雨量有限。 生长季节不足以维持大规模的葡萄最佳生产。亏缺灌溉策略 -基于减少灌溉以保持葡萄处于恒定的中等压力水平-已被证明增加了 红葡萄酒品种中的葡萄和葡萄酒质量。人们普遍认为，白葡萄品种需要更多的 然而，亏缺灌溉策略对葡萄和葡萄酒质量的影响在很大程度上是未知的。 在几个白色品种的葡萄浆果中积累了萜类化合物，决定了葡萄果实的香气 葡萄酒。最近的研究表明，严重的水分亏缺可以促进萜类生物合成基因的表达。 在葡萄里。 卡斯特拉林博士和CSW将在CSW Viognier中合作实施三种灌溉制度 葡萄园。卡斯特拉林博士将研究这些制度对葡萄成熟过程的影响，以及 葡萄中萜烯类物质的积累水平。卡斯特拉林博士团队将在 葡萄园(叶片水势和叶片气体交换)和实验室中的代谢物分析(总计 糖、有机酸、脱落酸和萜类)。该项目将确定如何管理灌溉 促进水果成熟，优化葡萄中萜类物质的积累，确实，提高葡萄酒质量。 这一信息将有利于不列颠哥伦比亚省的葡萄和葡萄酒行业，他们可能会采取新的战略来改善 提高葡萄和葡萄酒的质量，减少灌溉用水量。

The Canadian wine industry employs more than 31,000 people in Canada, welcomes more than 3 million tourists each year, and generates close to $6.8 billion in revenue. British Columbia (BC) is one of the two major viticultural regions of Canada. The winery Church and State Wines (CSW) is located in Okanagan Valley and is oriented to the production of premium wines. The Church and State Wines winery manages approximately120 acres of vineyards, all of which are irrigated on a daily basis. Okanagan Valley vineyards require frequent irrigation since limited rainfall during the growing season is not sufficient to sustain optimal grape production at a large-scale. Deficit irrigation strategies - based on reduced irrigation for keeping the vine at a constant moderate stress level - have proven to increase grape and wine quality in red-wine varieties. It is commonly accepted that white grape varieties needs more water; however, the impact of deficit irrigation strategies on grape and wine quality is largely unknown. Terpene compounds are accumulated in the grape berry of several white varieties and determine the aroma of wine. Recent studies indicate that severe water deficit can promote the expression of terpene biosynthesis genes in the grape. Dr. Castellarin and CSW will collaborate in implementing three irrigation regimes in a CSW Viognier vineyard. Dr. Castellarin will investigate the impact of these regimes on the ripening process of grapes and the level of accumulation of terpenes in grapes. Dr. Castellarin group will perform physiological measurements in the vineyard (leaf water potential and leaf gas exchanges) and metabolite analyses in the laboratory (total sugars, organic acids, abscisic acid, and terpenes). This project will identify how irrigation can be managed to promote fruit ripening, optimize the accumulation of terpenes in grapes and, indeed, improve wine quality. This information will benefit the BC grape and wine industry that might adopt new strategies for improving grape and wine quality in the vineyard and reducing the irrigation water usage.