A similar spatial expression pattern of the immune gene PR1 was also observed around the infection site during effector-triggered immunity.58,59 Compared with expression surrounding bacterial colonies, the immune marker CBP60g exhibited weaker, but general induction, in most cells at all infection stages, consistent with its role in inducing SA synthesis whose accumulation is required for defense within a leaf as well as systemic immune responses (Figure 5G).44,53. Here, TMEM37 is linked to infection.