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Infection of potato leaves inoculated with Phytophthora infestans strains HZ02, DL04, HS03, ML01-2018, MLYWS8802, and HJG02 (A), activities of pectinesterase (PE) in P. infestans (B), and enzymatic activities of PE in potato leaves infected by P. infestans DL04 and HZ02 (C). Different letters on the bars and the asterisks on the line chart indicate significant differences between treatments (p < 0.05).
