Suitable crop loading: An effective method to improve "Shine Muscat" grape quality

Jianing Li; Tingting Ma; Shihan Bao; Dingze Yin; Qian Ge; Caihong Li; Yulin Fang; Xiangyu Sun

doi:10.1016/j.foodchem.2023.136451

Suitable crop loading: An effective method to improve "Shine Muscat" grape quality

Food Chem. 2023 Oct 30:424:136451. doi: 10.1016/j.foodchem.2023.136451. Epub 2023 May 24.

Authors

Jianing Li¹, Tingting Ma², Shihan Bao², Dingze Yin¹, Qian Ge³, Caihong Li⁴, Yulin Fang⁵, Xiangyu Sun⁶

Affiliations

¹ 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.
² College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
³ 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; Quality Standards and Testing Institute of Agricultural Technology, Ningxia Academy of Agricultural Sciences, Yinchuan 750002, China.
⁴ Quality Standards and Testing Institute of Agricultural Technology, Ningxia Academy of Agricultural Sciences, Yinchuan 750002, China.
⁵ 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. Electronic address: fangyulin@nwsuaf.edu.cn.
⁶ 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. Electronic address: sunxiangyu@nwafu.edu.cn.

PMID: 37267652
DOI: 10.1016/j.foodchem.2023.136451

Abstract

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 C₁₃-norisoprenoid contents and substantially decreased C₆ 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.

Keywords: Aroma compounds; Berry quality; Crop load; Thin berry; “Shine Muscat” grape.

MeSH terms

Aldehydes / analysis
Fruit / chemistry
Oman
Terpenes / analysis
Vitis* / chemistry

Substances

n-hexanal
Aldehydes
Terpenes