不同类型果袋对秋蜜桃1号果实品质形成 和果皮色素变化的影响.

[Objective] The present paper aimed to explore the effects of different types of fruit bags on the formation of fruit quality and the change of peel pigment of Qiumitao No. 1, so as to provide reference for the high-quality production of Qiumitao No. 1 in southern China. [Method] Taking the fruit of Qiumitao No. 1 as the experimental material, four different types of fruit bags (yellow outside and black inside, single yellow bag, single white bag, single semi white translucent bag) were bagged after the first physiological fruit drop. The changes of pigment content in single fruit weight, vertical and horizontal diameters, fruit size, peel pigment, and pulp glyc acid content and relative enzyme activities were measured and analyzed every 7 days (5 times), before plucking fruit, and the change rule was analyzed. [Result] The results showed that the surface of fruit covered with yellow outside and black inside double-layer bag was smooth, the chlorophyll content was significantly lower than that of single-layer bag and showing white jade color (P < 0. OS, the same as below), the longitudinal diameter, transverse diameter and single fruit weight were higher than those of the other three treatments, and the content of quinic acid, malic acid, sucrose, sorbitol and total sugar of fruit covered with yellow outside and black inside double-layer bag were significantly lower than those of other single-layer bag treatments, which match with the light taste at maturity. Among the three single-layer bags, the yellow singlelayer bag had higher sucrose and fructose content, lower citric acid and quinic acid content, the highest total sugar content, the lowest total acid content and the highest sugar acid ratio. The results of correlation analysis showed that there was no significant correlation between the acid invertase activity and neutral invertase activity with sucrose content at late stage of fruit development (P > 0. OS). [Conclusion] Qiumitao No. 1 bagged with double-layer yellow outside and black inside has low pigment content and beautiful appearance, but the content of sugar and acid was lower, and the taste was lighter; the peel pigment content of Qiumitao No. 1 bagged with single-layer yellow fruit bag was higher than that of double-layer bag, and the fruit appearance was green and dull, but the content of sugar and acid in the fruit was higher than that of other bagged fruits. In production and markting, the type of fruit bag can be selected according to the needs of sales, which can improve the overall economic benefits. [ABSTRACT FROM AUTHOR]