College of Enology, Shaanxi Provincial Key Laboratory of Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Shaanxi Engineering Research Center for Viti-Viniculture, Heyang Viti-viniculture Station, Ningxia Eastern Foot of Helan Mountain Wine Station, Northwest A&F University, Yangling 712100, China.
College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
Food Chem. 2023 Oct 30;424:136451. doi: 10.1016/j.foodchem.2023.136451. Epub 2023 May 24.
Berry thinning was applied to control crop load of "Shine Muscat" grape variety. Primary and secondary metabolites released during berries development were monitored, and the correlation between physicochemical parameters and core aroma compounds was analyzed. Results revealed a significant increase in single-berry weight and sugar-acid ratio of berries under low crop load conditions. Furthermore, phenolic content and antioxidant activity under low crop load were significantly higher than those of the other groups. Grapes with low crop loads also exhibited better aroma characteristics and higher sensory scores than those of the other groups, chiefly due to significantly increased terpene and C-norisoprenoid contents and substantially decreased C compound and aldehyde contents. Moreover, correlation analysis revealed total soluble solid accumulation was positively correlated to terpene accumulation, while hexanal, 2-hexanal, (E)-2-hexanal, and (E)-2-octenal were positively correlated with titratable acidity content. Thus, better grape quality could be achieved by precisely controlling berry crop load.
疏果处理被应用于调控“Shine Muscat”葡萄品种的负载量。监测了浆果发育过程中释放的初级和次级代谢产物，并分析了理化参数与核心香气化合物之间的相关性。结果表明，在低负载量条件下，单果重和浆果的糖酸比显著增加。此外，低负载量下的酚类含量和抗氧化活性显著高于其他组。低负载量的葡萄表现出更好的香气特征和更高的感官评分，主要是由于萜烯和 C-法呢烯含量显著增加，C 化合物和醛含量显著降低。此外，相关性分析表明，总可溶性固形物的积累与萜烯的积累呈正相关，而己醛、2-己醛、(E)-2-己醛和(E)-2-辛醛与可滴定酸度呈正相关。因此，通过精确控制浆果负载量可以获得更好的葡萄品质。
