Abstract Common in Fungal Extracellular Membrane (CFEM) domain proteins are considered to be unique fungi and closely related pathogenicity. However, the Puccinia striiformis f. sp. tritici ( Pst ) effector containing CFEM has not been reported. Here, we obtained an effector, PstCFEM1, a functional N-terminal signal peptide sequence from race CYR31. qRT-PCR assay indicated that transcript level...