Table_5_Influence of late pruning practice on two red skin grapevine cultivars in a semi-desert climate.xlsx

Continually increasing global temperature could severely affect grape berry metabolite accumulation and ultimately wine polyphenol concentration and color intensity. To explore the effect of late shoot pruning on grape berry and wine metabolite composition, field trials were carried out on Vitis vinifera cv. Malbec and cv. Syrah grafted on 110 Richter rootstock. Fifty-one metabolites were detected and unequivocally annotated employing UPLC-MS based metabolite profiling. Integrating the data using hierarchical clustering showed a significant effect of late pruning treatments on must and wine metabolites. Syrah metabolite profiles were characterized by a general trend of higher metabolite content in the late shoot pruning treatments, while Malbec profiles did not show a consistent trend. In summary, late shoot pruning exerts a significant effect, though varietal specific, on must and wine quality-related metabolites, possibly related to enhanced photosynthetic efficiency, which should be taken into consideration when planning mitigating strategies in warm climates.

全球气温持续升高可能会严重影响葡萄浆果的代谢物积累，并最终影响葡萄酒的多酚浓度与色泽强度。为探究晚剪梢对葡萄浆果及葡萄酒代谢物组成的影响，本研究以嫁接于110 Richter砧木的马尔贝克（Malbec）与西拉（Syrah）两个欧洲葡萄（Vitis vinifera）栽培品种为材料开展田间试验。本研究采用基于超高效液相色谱-质谱联用（UPLC-MS）的代谢组学分析方法，共检测并精准注释了51种代谢物。通过层次聚类分析（hierarchical clustering）整合实验数据后发现，晚剪梢处理对葡萄醪与葡萄酒的代谢物具有显著影响。西拉品种的代谢物谱整体呈现晚剪梢处理组代谢物含量更高的变化趋势，而马尔贝克品种的代谢物谱则未表现出一致的规律。综上，晚剪梢对葡萄醪与葡萄酒品质相关代谢物具有显著调控效应，且该效应存在品种特异性，其作用机制可能与光合效率提升有关；在温暖气候区制定气候变暖缓解策略时，应将该因素纳入考量范围。