Phytohormones Jasmonic Acid, Salicylic Acid, Gibberellins, and Abscisic Acid are Key Mediators of Plant Secondary Metabolites

Abstract

Until recently, many studies on the role of phytohormones in plant secondary metabolism focused on jasmonic acid (JA), salicylic acid (SA), gibberellins (GA), and abscisic acid (ABA). It is now clear that phytohormone-induced regulation of signaling occurs via regulation of the biosynthetic pathway genes at the transcriptional level or through posttranslational regulation, or an increase in secondary metabolite deposition (e.g., trichomes). Here, we summarize recent advances, updating the current reports on the molecular machinery of phytohormones JA, SA, GA, and ABA involved in plant secondary metabolites. This review emphasizes the differences and similarities among the four phytohormones in regulating various secondary metabolic biosynthetic pathways and also provides suggestions for further research.

The MdNAC72‐MdABI5 module acts as an interface integrating jasmonic acid and gibberellin signals and undergoes ubiquitination‐dependent degradation regulated by MdSINA2 in apple

“…For example, the deposition of secondary metabolites such as flavonoids, lignin, and alkaloids can improve plant response to insect and herbivore feeding and pathogen invasion (Khare et al ., 2020; Jan et al ., 2021). Numerous studies have shown that plant hormones including jasmonic acid (JA) and gibberellin (GA) are involved in the biosynthesis of secondary metabolites (Chu et al ., 2011; Lv et al ., 2021; Kumari et al ., 2023).…”