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Objective To evaluate the nutritional value of amino acid content in Dendrobium devonianum Paxt. from different sources in Yunnan Province. Methods The amino acid analyzer method was used to determine the amino acid content of Dendrobium devonianum Paxt., and the amino acid nutritional value was evaluated by multivariate statistical analysis methods. Results The total amino acid (TAA) content in 29 samples ranged from 42.00 to 125.40 mg/g; the essential amino acid (EAA) content ranged from 16.80 to 44.60 mg/g; the content of aspartic acid, glutamic acid, leucine and arginine were the most abundant, which were 11.18, 9.97, 6.91 and 5.52 mg/g respectively and could be used as the characteristic amino acids of Dendrobium devonianum Paxt.. The content of cystine (0.92 mg/g) and methionine (1.10 mg/g) were the first and second limiting amino acids respectively. According to the amino acid pattern spectrum standards of the Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO), the nutritional value of Dendrobium devonianum Paxt. cultivated in greenhouse substrates in Lianghe Area [EAA/non-essential amino acid (NEAA) was 62.69%-77.21%; EAA/TAA was 38.63%-43.55%] and wild varieties (EAA/NEAA was 61.59%-65.43%; EAA/TAA was 38.12%-39.56%) were the highest and more in line with human needs. According to the comprehensive score ranking in the quality evaluation model, the values of the samples from Mangshi M10, M1, M7 and Longling L4, L5 were higher. Two principal components were extracted by principal component analysis, and the cumulative contribution degree was 83.852%, and a quality evaluation model of Dendrobium devonianum Paxt. was established. Cluster analysis was carried out with amino acids and comprehensive scores as variables respectively, and all samples could be divided into 3 major categories. Conclusion The amino acids of Dendrobium devonianum Paxt. is rich in nutrients, and the amino acid content of Dendrobium devonianum Paxt. from different sources varies. This study provides an important theoretical basis for the development and utilization of the nutritional value of Dendrobium devonianum Paxt.. At the same time, it is recommended to pay attention to the origin and cultivation methods of Dendrobium to enhance its market value.
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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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