JASMONATES NEGATIVELY INTERFERE WITH FRUIT DEVELOPMENT AND RIPENING IN PEACH (Prunus persica L. Batsch)
نویسندگان
چکیده
Jasmonates (JAs) are signal molecules which elicit stress responses through JAs-responsive genes; they are also involved in developmental processes, including fruit growth and ripening. In the present study, methyl jasmonate (MJ) and n-propyl dyhydrojasmonate (PDJ) were applied to peach trees at the S1, S3 and S4 phases. In all cases, both chemicals inhibited climacteric ethylene production and delayed flesh softening leading to a ripening delay. A trascriptome profiling of JA-treated versus control fruit indicated that MJ down-regulates genes positively involved in fruit ripening (for instance 1-aminocyclopropane-1-carboxylic acid oxidase and polygalacturonase) while up-regulates several defence-related genes, including allene oxide synthase (AOS) which is involved in JA biosynthesis, and cell wall-related genes.
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