Abstract
To date, extensive studies have identified many classes of hormones in plants and revealed the specific, nonredundant signaling pathways for each hormone. However, plant hormone functions largely overlap in many aspects of plant development and environmental responses, suggesting that studying the crosstalk among plant hormones is key to understanding hormonal responses in plants. The phytohormone jasmonic acid (JA) is deeply involved in the regulation of plant responses to biotic and abiotic stresses. In addition, a growing number of studies suggest that JA plays an essential role in the modulation of plant growth and development under stress conditions, and crosstalk between JA and other phytohormones involved in growth and development, such as gibberellic acid (GA), cytokinin, and auxin modulate various developmental processes. This review summarizes recent findings of JA crosstalk in the modulation of plant growth and development, focusing on JA–GA, JA–cytokinin, and JA–auxin crosstalk. The molecular mechanisms underlying this crosstalk are also discussed.
Highlights
Plant growth and physiology are regulated by endogenous processes and environmental signals; phytohormones govern these processes by controlling transcriptional and translational networks
When jasmonic acid (JA) biosynthesis is activated in response to endogenous or environmental signals, and JA, especially JA-isoleucine conjugate (JA-Ile), accumulates in cells, JA-Ile activates JA signaling through interaction with the COI1 receptor
This review briefly describes the metabolism and signaling pathways of the phytohormones gibberellic acid (GA), cytokinin, and auxin that interact with JA in the modulation of plant growth and development, and recent findings on JA crosstalk, focusing on the JA–GA, JA–cytokinin, and JA–auxin interactions
Summary
Plant growth and physiology are regulated by endogenous processes and environmental signals; phytohormones govern these processes by controlling transcriptional and translational networks. When JA biosynthesis is activated in response to endogenous or environmental signals, and JA, especially JA-Ile, accumulates in cells, JA-Ile activates JA signaling through interaction with the COI1 receptor This direct interaction induces proteolysis of the JAZ proteins and activates the expression of JA-responsive genes by releasing the MYC2 transcription factor from the JAZ–MYC2 complex [8]. As JAZs and MYC2 are key factors in plant growth and development as positive and negative regulators, respectively, they may mediate JA-dependent growth inhibition under stress conditions [12,13,14] Plant hormones have their own specific biosynthetic and signaling pathways, but their roles in plant development and physiology overlap. The molecular mechanisms underlying the JA–GA, JA–cytokinin, and JA–auxin interactions are discussed in this review
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.