Table 1. Concentration of β-carboline alkaloids (μg/l ± SD) determined by GC-MS in cell-free filtrates of C. coronatus.

	MM medium	LB medium
Harman	6.91 ± 1.43 A	3.49 ± 1.19 A
Norharman	7.76 ± 1.67 B	3.33 ± 0.82 B

Statistically significant differences are marked with the same letters (Student’s t-test, P≤0.05).

C. coronatus cultured in minimal medium (MM) produced significantly more of both alkaloids compared with the fungus propagated in rich (LB) medium.