2.2.1 Preparation of fungi spore suspensions
Both the A. niger NRRL 334 and A. oryzae NRRL 5590 were incubated on potato dextrose agar (PDA) plates at 30℃ for 7 days. Spore suspensions were prepared using deionized water, followed by spore counting using direct microscopy (Leica, Model 97 S6E, Wetzlar, Germany) with a hemocytometer (Bright-Line, Horsham, PA, USA). Spore suspensions were prepared before the inoculation.