Effect and Mechanism of Methyl Jasmonate on Incidence of Grey Mould Decay in Postharvest Blueberry

doi:10.7506/spkx1002-6630-201622047

Abstract

Abstract: The effects of methyl jasmonate (MeJA) treatment on postharvest grey mould decay, the activities of enzymes involved in reactive oxygen species (ROS) metabolism, defense-related enzymes activities and total phenol and total anthocyanin contents in ‘Elliott’ blueberry were investigated. Blueberry fruits were treated with MeJA at 50 μmol/L, inoculated with Botrytis cinerea and then stored at (1 ± 1) ℃ for 16 days. MeJA treatment resulted in significantly lower disease incidence compared with control fruits. MeJA treatment significantly inhibited the activities of catalase (CAT) and ascorbate peroxidase (APX) and thus resulted in a higher level of H2O2 in the early period of storage. However, MeJA treatment enhanced the activities of phenylalanine ammonialyase (PAL), polyphenoloxidase (PPO) and peroxidase (POD), and induced the synthesis of phenolics and lignin. These results suggest that MeJA treatment can reduce the incidence and severity of grey mould decay by enhancing the disease resistance of blueberry fruit.

Key words: methyl jasmonate, reactive oxygen species metabolism, defense-related enzymes, disease resistance, gray mould decay

CLC Number:

TS255.3

HUANG Xiaojie, LI Jing, CHAI Yuan, HAN Yuanyuan, GAO Jiayue. Effect and Mechanism of Methyl Jasmonate on Incidence of Grey Mould Decay in Postharvest Blueberry[J]. FOOD SCIENCE, 2016, 37(22): 307-312.

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