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The differential metabolites of Sangshen（Mori Fructus）with different maturities were studied to provide reference for the determination of Sangshen（Mori Fructus）harvest time.
Based on the metabolo micsmethod，the changes of chemical components in Sangshen（Mori Fructus）with different maturities were explored.The data of secondary metabolites in mulberry fruits was collected by ultra-high performance liquid chromatography-quadrupole/exactive Orbitrap mass spectrometry（UPLC-Q-Exactive Orbitrap MS）.Multivariate statistical analysis methods such as principal component analysis（PCA）and partial least squares discriminant analysis（PLS-DA）were used to explore the differences in metabolic components of Sangshen（Mori Fructus）with different maturities.
There were significant differences in the metabolites of Sangshen（Mori Fructus）with different maturities.A total of176 compounds in 11 categories were screened.Flavonoids and organic acids accounted for 23.30% and 21.02%，respectively.The contents of most screened flavonoids and organic acid differential metabolites increased with the increase of maturity，and the flavonoids and organic acid metabolites of Sangshen（Mori Fructus）of different germplasms were different.The contents of extract，total flavonoids，total polyphenols and rutin in the mature stage were higher than those in the immature stage.The antioxidant activity in the mature stage was stronger than that in the immature stage.The content of chlorogenic acid in the immature stage was higher than that in the mature stage，and the inhibitory effectonα-glucosidase was also stronger than that in the mature stage.
There are obvious differences in the metabolites of Sangshen（Mori Fructus）with different maturities.The contents of chemical components in Sangshen（Mori Fructus）are related to different maturities.Based on the antioxidant effect，it is better to harvest when Sangshen（Mori Fructus）is dark purple（mature）.Based on the hypoglycemic effect，it is better to harvest when the Sangshen（Mori Fructus）becomes red（immature），which provides a basis for the quality control of Sangshen（Mori Fructus）and the determination of harvesting time.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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