Fig. 1

Growth curve analysis of Aspergillus flavus isolates AF13 and NRRL3357 under increasing oxidative stress and conidial concentration. The growth of AF13 (a, c) and NRRL3357 (b, d) were examined under increasing H₂O₂ concentrations in YES medium inoculated with either 2.0 × 10⁴ (a, b) or 8.0 × 10⁴ conidia/mL (c, d) by monitoring absorbance at 405 nm over 100 h. A threshold of 0.2 was selected for growth initiation timing which corresponded with linear phase initiation for both isolates in most conditions and is indicated by the dashed red line. Error bars represent standard deviation. No growth was detected at H₂O₂ concentrations > 15 mM in NRRL3357 with earlier growth initiation detected at higher conidia concentrations