TMEM37 and infection: The expression of PR1 family genes has long been used as a marker of salicylic acid (SA)-mediated disease resistance, and the upregulation of PR1 proteins throughout the infection stage, combined with their localization to the apoplast, which is an important interface for plant-microbe interactions, means that they can be regarded as a potential antimicrobial function protein family (Breen et al., 2017).