Abstract
Cordyceps cicadae is an edible mushroom. Selenium (Se) and zinc (Zn) are essential microelements for humans. To develop Se–Zn biofortification strategies for C. cicadae, the effects of three Se species (selenium nanoparticles, selenite, and selenate) and two Zn species (zinc sulfate and EDTA-zinc) on biomass, mineral elements, mannitol, adenosine, cordycepin, and bioaccessibility were investigated. The fruiting bodies had significant bioaccumulation and biotransformation ability for selenite, which converted selenium nanoparticles, selenite, and selenate into selenocysteine (63.5–70.2%) and selenomethionine (20.4–27.7%). Selenite and selenate eliminated inhibition of fruiting bodies growth by zinc. The synthesis of mannitol and adenosine was promoted by Se–Zn biofortification, while interfering with multi-elements enrichment. During gastrointestinal digestion, over 57.1% of total Se, 41.3% of essential microelements, 100% of selenomethionine, and 6.0% of selenocysteine were released. The release of adenosine and cordycepin in selenite plus zinc sulfate treatment were increased by 21.9% and 106.0% compared with control. The findings indicate that Se–Zn-enriched C. cicadae is a novel Se and Zn supplement.
Published Version
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