MILR1 and infection: More specifically, reduced disease symptom severity in BSMV-Pst-milR1 hairpin-treated seedlings was correlated with 60–70% knockdown of the abundance of the pathogen Pst-milR1, a 6–9-fold increase in the expression level of PR2, and a significant reduction in Pst biomass across the 120-h infection period assessed [96].