PPOX and infection: Furthermore, fruits inoculated with N. haematococca substantially increased on day five (121 Umg−1 of protein), reaching the maximum PPO activity (272 Umg−1 of protein) under all the conditions tested (p < 0.05), as can be seen in Figure 2A. In addition, positive interaction between days of storage and inoculation was found in PPO activity (Table S1), demonstrating that postharvest storage and infection by the pathogen have a combined effect on PPO activity.