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International Journal of Medicinal Mushrooms
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ISSN Druckformat: 1521-9437
ISSN Online: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2017024388
pages 937-947

Evaluation of Fatty Acid Composition and Antioxidant Activity of Wild-Growing Mushrooms from Southwest China

Yu Luo
Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, Sichuan University, Chengdu, Sichuan, China
Yi Huang
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China
Xiaohong Yuan
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China
Lei Zhang
Sichuan Academy of Chinese Medicine Science, Chengdu, Sichuan, China
Xinyi Zhang
Key Laboratory of Medicinal and Edible Plants Resources Development, Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, Chengdu University, Sichuan, China
Ping Gao
Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, Sichuan University, Chengdu, Sichuan, China

ABSTRAKT

To better understand the medicinal and nutritional value of mushrooms, we studied the fatty acid (FA) compositions and DPPH scavenging abilities of 11 mushrooms from Southwest China. The crude fat (CF) contents were examined initially, then 3 methods of FA methyl esterification were compared to identify which acid treatment was the most appropriate method. Then methyl esterification methods for 12 CFs were performed with acid treatment and the FA compositions were analyzed with gas chromatography–mass spectrometry. The results showed that tetradecanoic acid (14:0), hexadecenoic acid (16:1), hexadecanoic acid (16:0), heptadecanoic acid (17:0), octadecadienoic acid (18:2), octadecenoic acid (18:1), octadecanoic acid (18:0), docosanoic acid (22:0), and tetracosanoic acid (24:0) were detected in all the samples, with large amounts of hexadecanoic acid (16:0), octadecadienoic acid (18:2), octadecenoic acid (18:1), and octadecanoic acid (18:0). Daldinia eschscholtzii and Sarcodon imbricatus had the highest ratio value of unsaturated FAs to saturated FAs (4.33 and 3.03, respectively). The DPPH scavenging ability of 12 CFs was also tested. The free radical scavenging rates of the CFs were almost < 10% at a concentration of 0.10 mg/mL, except that of S. imbricatus, which reached 81.25%, with a half-maximal inhibitory concentration of 0.054 mg/mL. This strong DPPH free radical scavenging ability of S. imbricatus may be related to α-hydroxy FA.


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