Targeted metabolomic analysis of active substances in Auricularia heimuer cultivated on different substrates
Auricularia heimuer is an important edible and medicinal fungus,which contains rich nutrients and bioactive components,and is widely cultivated in China.Targeted metabolomics was used to examine the variations in sugar,flavonoid,polyphenol,and essential amino acid content in A.heimuer grown on sawdust(SW),corncob(CO),and cottonseed shell(CH).It was found that the lowest total sugar content was demonstrated in the fruiting bodies grown on SW substrate.There was no significant difference in total flavonoid content in the fruiting bodies grown on the different substrate.Vitexin content was the highest in the fruiting bodies grown on CO substrate,but the lowest in those grown on CH substrate.Polyphenol content was usually higher in the fruiting bodies grown on SW substrate.The total content of amino acids and their derivatives was the highest in the fruiting bodies on CH substrate,and the levels of nine essential amino acids,especially lysine and histidine having substantial biological activities,were much higher in fruiting bodies on CH substrate than in those on the SW and CO substrates.The comprehensive determination of the content of sugars,flavonoids,polyphenols and essential amino acids in the fruit bodies of A.heimuer cultivated in different substrates can provide clues and basis for identification of nutritional quality of A.heimuer and development of functional products with different functions.
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