Probable tyrosine-protein phosphatase that acts as negative regulator of defense responses against the fungal pathogen Magnaporthe oryzae. H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate Expressed in roots and young panicles. Plants overexpressing DSP2 exhibit increased sensitivity to infection by the fungal pathogen Magnaporthe oryzae. Belongs to the protein-tyrosine phosphatase family.