Fig. 3.

Effect of various sodium salt ions on the cordycepin and adenosine production of C. militaris-fermented oats in solid culture. DOW (a), Na-SW (b), NaNO₃ (c), Na₂SO₄ (d), Na₃PO₄ (e), or NaCl (f) solution was added to the solid substrate of C. militaris during solid culture, respectively. NaNO₃, Na₂SO₄, Na₃PO₄ and NaCl solution included equal SO₄ ²⁻, PO₄ ³⁻, NO₃ ⁻, and Cl⁻ concentration to that in 30X or 60X DOW, respectively. Na-SW was a mixture of the four sodium salt solutions. Data are presented as mean ± SD (n = 3). *, **, *** indicated the significant difference (p < 0.05, p < 0.01, p < 0.001, respectively) as compared with UPW.