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Outline
To systematically evaluate the multi-dimensional quality attributes of Lycium barbarum L.shaped by geographical terroir.
This study conducted a comprehensive assessment of 95 representative Lycium barbarum L. samples from the 4 major production areas in northwest China, namely Gansu (GS), Ningxia (NX),Qinghai (QH) and Xinjiang (XJ). The morphology, nutritional components, flavor metabolites and antioxidant capacity were analyzed, and the analysis was carried out using multiple chemometrics methods.
The longitudinal diameter of the fruits in the QH region was the most prominent, averaging 21.86 mm, which was significantly higher than that in other regions (P<0.05). However, the fruits from the XJ region were relatively short in longitudinal diameter (averaging 16.40 mm); the QH region demonstrated the highest standard of commercial quality, followed closely by the XJ region. Analysis of the basic nutritional components of Lycium barbarum L. from 4 production areas: samples from the XJ production area showed lower moisture content (average 12.39 g/100 g) and protein content(average 12.86 g/100 g), and their ash content (20.15 g/100 g) was significantly higher than that of the other three regions. The crude fat content (average 0.61 g/100 g) was the lowest among the 4 production areas. The content of vitamin C was relatively high. Lycium barbarum L. from all production areas had demonstrated excellent free radical scavenging capabilities, but they showed different free radical preferences. The sensory quality showed significant characteristic differences in different production areas (P<0.05). The aroma and taste of Lycium barbarum L. from the XJ production area were significantly higher than those from other regions (P<0.05), and the color showed obvious abnormal pigment deposition or a tendency of browning of the fruit skin.
There are significant morphological differentiations among different production areas, and this variation is influenced by the interaction between genetics and the environment. This study identify 12 key biomarkers driving regional differentiation, providing a scientific basis for the origin traceability, quality standardization and variety screening of Lycium barbarum L. in different ecological environments.
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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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