Enrichment of edible fungi to l-deoxynojirimycin in mulberry branches.

[Objective] This research aimed to explore the enrichment of edible fungi to the DNJ in mulberry branches.[Method] Reversed phase high performance liquid chromatography(RP-HPLC) method was used to study the enrichment of 9 varieties of edible fungi to the I-deoxynojirimycin(DNJ) in mulberry branches.[Result] The test edible fungi all could not synthesize DNJ,but Auricularia auricular,Ganoderma lucidum and Hericium erinaceus had enrichment capability to DNJ,and the enrichment was higher in pileus than in stipe.With the increasing proportion of mulberry sawdust in cultivation materials,the contents of DNJ in Ganoderma lucidum and Hericium erinaceus had increased;when the proportion of mulberry sawdust had achieved 50%,the contents of DNJ in the pileus of Hericium erinaceus and Ganoderma lucidum reached the maximum,which were 0.070 4% and 0.047 2%,respectively;afterwards,the contents of DNJ in the pileus were reduced with the increasing proportion of mulberry sawdust;when the proportion of mulberry sawdust had achieved 80%,the contents of DNJ in the pileus of Hericium erinaceus and Ganoderma lucidum had decreased to 0.047 4% and 0.032 7%,respectively.[Conclusion] This study provided theoretical basis and reference for the development of edible fungi in mulberry branches with hypoglycemic effects.