User:SeattleDownpour/Plant hormone

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JAs have been shown to interact in the signalling pathway of other hormones in a mechanism described as “crosstalk.” The hormone classes can have both negative and positive effects on each other's signal processes.1

Jasmonic acid methyl ester (JAME) has been shown to regulate genetic expression in plants6. They act in signalling pathways in response to herbivory, and upregulate expression of defense genes.3 Jasmonyl-isoleucine (JA-Ile) accumulates in response to herbivory, which causes an upregulation in defense gene expression by freeing up transcription factors.3

Jasmonate mutants are more readily consumed by herbivores than wild type plants, indicating that JAs play an important role in the execution of plant defense. When herbivores are moved around leaves of wild type plants, they reach similar masses to herbivores that consume only mutant plants, implying the effects of JAs are localized to sites of herbivory.4 Studies have shown that there is significant crosstalk between defense pathways.5