TMEM37 and infection: In this work, the roles played by MPK3 and MPK6 in riboflavin-induced resistance to Pst DC3000 were investigated to see whether riboflavin increases the levels of MPK3 and MPK6 transcript and transient expression of PR1 gene and whether or not the activities of MPK3 and MPK6 were strongly enhanced upon infection by Pst DC3000, with effects of riboflavin exerted through H2O2- and Ca2+-related signaling pathways.