【Objective】 We analyzed the microRNAs of Arabidopsis in response to infection by Phytophthora parasitica,to understand microRNA targets regulation network,potential pathological and biological roles in processes of response to challenged by infection.【Method】 The compatible Phytophthora parasitica-Arabidopsis thaliana pathosystem was employed to identify plant microRNAs in response to pathogen infection,to construct the target genes regulation networks,and to perform Gene Ontology and domain enrichment anal...