MeJA-Induced Disease Resistance in Postharvest Tomato Fruits

doi:10.7506/spkx1002-6630-201209003

Abstract

Abstract: In order to seek a safe non-toxic way for postharvest preservation and disease defense, the functions and mechanisms of methyl jasmonate (MeJA)-induced disease resistance were studied. Green mature tomato fruits (Lycopersicon esculentum cv. Lichun) were inoculated with grey mould elicitor to evaluate the disease resistant inductive effect of MeJA. The pathogen resistance and chemical indexes of tomato fruits subjected to different treatments were examined. The results showed that exogenous MeJA treatment could effectively inhibit the occurrence of postharvest diseases in tomato fruits and widen the antimicrobial spectrum against Alternaria solani, Botrytis cinerea, Penicillium expansum and Rhizopus stolonifer. Despite the direct antifungal effect, MeJA executed its function by eliciting resistance responses. The accumulation of antibacterial substances including pathogenesis-related proteins, phenolics and lycopene, could be induced by MeJA at the same level as fungal elicitor. This protective role of MeJA on postharvest tomato fruits has important practical significance and application prospects.

Key words: tomato fruit, methyl jasmonate, induced disease resistance, elicitor

CLC Number:

TS255.3

YUMeng-meng，SHENLin，SHENGJi-ping. MeJA-Induced Disease Resistance in Postharvest Tomato Fruits[J]. FOOD SCIENCE, 2012, 33(9): 11-15.

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MeJA-Induced Disease Resistance in Postharvest Tomato Fruits

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