关键词: 葡萄; 环剥; 可溶性糖组分; 含量

Abstract: 【Objective】 The project aims to contrast the differences and analyze the characteristics of soluble sugar content and components in different stage of Crimson seedless grape with trunk girdling in four different periods in the hope of laying a theoretical foundation for revealing the effect of girding on soluble sugar in fruits.【Method】The trunk girdling of Crimson seedless grape was carried out in four different periods to monitor the growth and development of the fruit. The soluble sugar components and content in the mature fruit were determined by high performance liquid chromatography and the correlation analysis was carried out, too.【Result】Among the five test treatments, the fruit shape index of the first girdling treatment was the largest, 5.67% larger than that of the check treatment, and the single grain weight was also the largest, reaching 2.99 g. In terms of maturity, the third ring stripping treatment was the earliest. The soluble sugar of the fruit was mainly composed of fructose, glucose and sucrose in the five experimental treatments, among which the content of glucose and fructose was high, the amplitude of variation of which was large, the content of sucrose was relatively stable, and the content of glucose was slightly higher than that of fructose. The highest content of glucose was the second girdling treatment, which was significantly higher (21.67% higher) than that of the check treatment. The highest content of fructose was the third girdling treatment, which was significantly higher (21.4% higher) than the control treatment. The highest content of sucrose was the fourth girdling treatment, which was 29.65% higher than that of the check treatment; the highest total sugar content was the second ring stripping treatment. There was a significant positive correlation between glucose, fructose and soluble total sugar, and between glucose and fructose. The correlation between fructose and total soluble sugar was the largest; The analysis found that the correlation of fructose and soluble total sugar was the highest, which was slightly higher than that of glucose and soluble total sugar. The analysis showed that the correlation of sucrose and soluble total sugar was minimal with no significant correlation.【Conclusion】The trunk girdling is beneficial to the growth and soluble sugar accumulation in Crimson seedless grapes, which indicates that the increase of yield can be obviously achieved in the early stage (from fruit setting to fruit bulking stage). In the later stage (after the bulking period), the girdling is good for fruit ripening in advance.

Key words: grape; girdling; soluble sugar component; content