The Multifaceted Role of Jasmonic Acid in Plant Stress Mitigation: An Overview

Abstract

Plants, being sessile, have developed complex signaling and response mechanisms to cope with biotic and abiotic stressors. Recent investigations have revealed the significant contribution of phytohormones in enabling plants to endure unfavorable conditions. Among these phytohormones, jasmonic acid (JA) and its derivatives, collectively referred to as jasmonates (JAs), are of particular importance and are involved in diverse signal transduction pathways to regulate various physiological and molecular processes in plants, thus protecting plants from the lethal impacts of abiotic and biotic stressors. Jasmonic acid has emerged as a central player in plant defense against biotic stress and in alleviating multiple abiotic stressors in plants, such as drought, salinity, vernalization, and heavy metal exposure. Furthermore, as a growth regulator, JA operates in conjunction with other phytohormones through a complex signaling cascade to balance plant growth and development against stresses. Although studies have reported the intricate nature of JA as a biomolecular entity for the mitigation of abiotic stressors, their underlying mechanism and biosynthetic pathways remain poorly understood. Therefore, this review offers an overview of recent progress made in understanding the biosynthesis of JA, elucidates the complexities of its signal transduction pathways, and emphasizes its pivotal role in mitigating abiotic and biotic stressors. Moreover, we also discuss current issues and future research directions for JAs in plant stress responses.

Whole Genome Duplication Events Likely Contributed to the Aquatic Adaptive Evolution of Parkerioideae

“…In both WGD event #2 and event #3, the possible responses to the low oxygen concentrations of aquatic habitats were found, such as the “glycolytic process” and “cellular response to acetate” in WGD event #2, and the “alcohol metabolic process“ and “aldehyde dehydrogenase [NAD(P)+] activity“ in WGD event #3 ( Figure 3 a) [ 46 ]. In addition to the metabolic, transport, and regulation process of carbohydrates, proteins, and lipids, those of the stress-related compounds were also enriched, such as jasmonic acid, salicylic acid, and thiamine in both WGD event #2 and event #3, brassinosteroid and vitamin E in WGD event #2, and phenylpropanoid in WGD event #3 ( Figure 3 a) [ 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. More interestingly, we found some functional terms associated with circadian rhythm and cell cycle in both WGD event #2 and event #3, such as “positive regulation of cyclin-dependent protein kinase activity” ( Figure 3 a).…”

Jasmonate Promotes Ester Aroma Biosynthesis during Nanguo Pears Storage

“…MeJA is the earliest jasmonate discovered and was identified in frangipani as an aromatic substance [17]. Later, subsequent studies found that MeJA is a natural plant hormone and signaling molecule that participates in regulating various important biological processes [18][19][20][21][22][23][24]. MeJA is widely used due to its rapid uptake by plants, affordable cost, and safety [22,25].…”