PRTN3 and infection: As shown in Figure 11, PHS treatment significantly elevated mRNA levels of PR‐1a, PR‐3, PR‐4b, PR 5 (OSM), and SAR 8.2 at 48 h, as well as PR 5 and nonexpressor of PR1 (NPR1) at 72 h in pathogen‐infected tobacco plants compared with that in pathogen infection alone plants.