BAK1 and infection: Interestingly, Fv/Fm dynamics in DC3000hrpA challenged bak1‐5 leaves pretreated with flg22 or elf18 before infection were wild type in response, whereas chitin pretreatment only partially protected against Fv/Fm suppression in the bak1‐5 background (Figure 4d–f and Supporting Information: Figure 1c,d).