Induced sysmatic resistance of potato to common scab by MeJA

摘要

Effect of methyl jasmonate (MeJA) on the resistance of potato to common scab was studied in this paper. To elucidate the physiological mechanism of resistance induced by MeJA, the contents of superoxide anion free radical and MDA, and different pigments (chlorophyll a, b and carotenoid) were measured. Also, the activities of pathogen-resistance related Phenylalanine Ammonia Lyase (PAL) and anti-oxygen enzymes Polyphenol Oxidase (PPO), Peroxidase (POD) and Catalase (CAT) were analyzed. The results showed that MeJA can effectively inhibit the growth rate of seedlings, increase the contents of chlorophyll a and b, decrease the MDA level, and promote the activities of enzyme PAL and anti-oxygen enzymes POX, POD and CAT. Thus, MeJA can induce the system resistance of potato to common scab and could be used as anti-pathogenic agent for potato common scab control.