Journal
FOOD CHEMISTRY
Volume 310, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.125901
Keywords
MYC2 transcription factor; Methyl jasmonate; Tomato fruit; Disease resistance
Funding
- National Natural Science Foundation of China [31772024]
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU)
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The mechanism of SlMYC2, involved in methyl jasmonate (MJ)-induced tomato fruit resistance to pathogens, was investigated. The data indicated that MJ treatment enhanced the accumulation of total phenolics and flavonoids, as well as individual phenolic acids and flavonoids, which might be caused by the increased phenylalanine ammonia-lyase and polyphenol oxidase activities, induced pathogenesis-related gene (PR) expression, beta-1,3-glucanase and chitinase activities, as well as alpha-tomatine, by inducing GLYCOALKALOID METABOLISM gene expression. These effects, induced by MJ, partly contributed to tomato fruit resistance to Botrytis cinerea. Nevertheless, the induction effects of MJ were almost counteracted by silence of SlMYC2, and the disease incidence and lesion diameter in MJ + SlMYC2-silenced fruit were higher than those in MJ-treated fruit. These observations are the first evidence that SlMYC2 plays vital roles in MJ-induced fruit resistance to Botrytis cinerea, possibly by regulating defence enzyme activities, SIPRs expression, alpha-tomatine, special phenolic acids and flavonoid compounds.
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