Binding of micro-nutrients to the cell wall of the fungus Schizophyllum commune

•Micro-nutrients bind to the cell wall of Schizophyllum commune.•Binding of micro-nutrients to the cell wall is reversible.•Release of micro-nutrients from the cell wall is promoted at low pH.•Cations bind to cell wall proteins.•Anions bind to the cell wall as well as to the cations within the cell wall.