Jasmonic acid, its precursors in the biosynthetic pathway and derivatives are lipid‐derived signalling molecules. Together with other plant hormones, they regulate responses to stress (biotic and abiotic), mediate defence (against pathogens and herbivores), and a plethora of processes including growth and reproductive development in different plant species.
The discovery of jasmonates is more recent than that of auxin, abscisic acid, cytokinins, gibberellic acid, ethylene, and salicylic acid; however, their role in regulating plant developmental plasticity is second to none. Since the 1990s, research made substantial advances and added to the crosstalk with the abovementioned other hormones and signalling pathways. Building on the knowledge of over two decades, an update on the research in JAs signalling components regulating plant responses to developmental and environmental cues is provided here. Information in
Arabidopsis thaliana
is integrated with reports on other plants. Recent findings in the regulation of plant responses to biotics and abiotic stressors and evidence implicating JAs in the regulation of the trade‐off between growth and stress will be reported. Health applications for JAs and JAs‐induced secondary metabolism, bridging the gap between biotechnology and traditional medicine, will illustrate the practical and societal relevance of investigating the functions of such compounds.
This study contributes to the understanding of the regulation of growth and the production of metabolic resources by JAs and COI1. This will have important implications in dissecting the complex relationships between hormonal and cell wall signalling in plants. The work also provides tools to uncover novel mechanisms co-ordinating cell division and post-mitotic cell expansion in the absence of organ developmental control.
The first characterization of W08E12.2, W08E12.3, W08E12.4 and W08E12.5, four putative metalloproteins in C. elegans. (A) phase contrast microscopy, (B) fluorescence microscopy of PW08E12.3;W08E12.4::GFP.
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