Two Polyketide Synthase Genes, VpPKS10 and VpPKS33, Regulated by VpLaeA Are Essential to the Virulence of Valsa pyri

, the causal agent of pear canker disease, typically induces cankers on the bark of infected trees and even leads to tree mortality. Secondary metabolites produced by pathogenic fungi play a crucial role in the pathogenic process. In this study, secondary metabolic regulator VpLaeA was identified in