Secondary metabolites from the culture broth of Lactarius quieticolor growing in a bioreactor

In this work, the main secondary metabolites in Lactarius quieticolor cultivated in a bioreactor were determined to find a possible use for its broths, which are eliminated as waste products after fermentation. The broths were extracted for adsorption in solid phase using amberlite XAD-2 and solid-phase extraction (SPE), and the extracts were analyzed by gas chromatography-mass spectrometry. The main metabolites extracted with XAD-2 were propanedioic acid (3-oxo-1-cyclopentane-1-yl) (37%) and hydroquinone derivatives (17%), whereas with SPE the main metabolite was decanoic acid (93%), suggesting that L. quieticolor broths could be used to obtain secondary metabolites of industrial interest, like decanoic acid. Key words: Decanoic acid, ectomycorrhizal fungus, edible mushrooms, organic acids.