Comparison of the pathway structures influencing the temporal response of salicylate and jasmonate defence hormones in Arabidopsis thaliana

• Published in: Frontiers in plant science Vol. 13; p. 952301
• Main Authors: Stroud, Erin A., Jayaraman, Jay, Templeton, Matthew D., Rikkerink, Erik H. A.
• Format: Journal Article
• Language: English
• Published: Frontiers Media S.A 09-09-2022
• Subjects: Arabidopsis; defence; jasmonic acid; phytohormone; Plant Science; salicylic acid; temporal regulation
• ISSN: 1664-462X; 1664-462X
• DOI: 10.3389/fpls.2022.952301

Defence phytohormone pathways evolved to recognize and counter multiple stressors within the environment. Salicylic acid responsive pathways regulate the defence response to biotrophic pathogens whilst responses to necrotrophic pathogens, herbivory, and wounding are regulated
via
jasmonic acid pathways. Despite their contrasting roles
in planta
, the salicylic acid and jasmonic acid defence networks share a common architecture, progressing from stages of biosynthesis, to modification, regulation, and response. The unique structure, components, and regulation of each stage of the defence networks likely contributes, in part, to the speed, establishment, and longevity of the salicylic acid and jasmonic acid signaling pathways in response to hormone treatment and various biotic stressors. Recent advancements in the understanding of the
Arabidopsis thaliana
salicylic acid and jasmonic acid signaling pathways are reviewed here, with a focus on how the structure of the pathways may be influencing the temporal regulation of the defence responses, and how biotic stressors and the many roles of salicylic acid and jasmonic acid
in planta
may have shaped the evolution of the signaling networks.