Jasmonic acid (JA) – what it is, properties, uses, and safety notes for cosmetics, agriculture, and R&D
Jasmonic acid – C₁₂H₁₈O₃

Synonyms: JA, (−)-jasmonic acid (natural form), (±)-jasmonic acid (racemic mixture), jasmonates (related class)
INCI / functions: jasmonic acid as a neat substance is not typically used as a mainstream INCI in EU cosmetics; in cosmetic practice, jasmonate derivatives (e.g., Tetrahydrojasmonic Acid) are more commonly found in ingredient repertoires with dedicated functions.

Definition

Jasmonic acid (JA) is an organic compound belonging to the jasmonate family, best known as a plant hormone and signaling molecule involved in plant responses to biotic stress (e.g., insect attack) and abiotic stress (e.g., cold, drought). From a compositional standpoint, the ingredient corresponds primarily to the jasmonic acid molecule itself, with potential differences in stereochemistry between the natural form and commercial mixtures; in industrial or laboratory grades, controlled trace levels of related isomers and process impurities may be present within specification. In terms of use, jasmonic acid is most commonly employed in R&D, in agronomic contexts as a regulator/elicitor of defense responses, and in cosmetics mainly as a conceptual reference or via derivatives (jasmonates) used in anti-age/skin renewal strategies (supplier- and positioning-dependent).

• Food: not a typical food ingredient; interest is mainly scientific or linked to plant-derived supply chains.

• Cosmetics: direct use as jasmonic acid is less common; jasmonate derivatives are more frequently used in cosmetic actives (claims and dossier must be validated on the finished product).

• Medicine: mainly preclinical/research interest for the jasmonate class; not equivalent to clinical indications.

• Pharmaceutical: possible role as a study molecule or R&D intermediate; any application requires a specific dossier.

• Industrial use: technical use as a standard/auxiliary in analytical chemistry, biotech, and derivative development (grade-dependent).

Calories (energy value)

Identification data and specifications

Key constituents

Physicochemical properties (practically relevant)

Functional role and positioning

Formulation compatibility (indicative)

Use guidelines (indicative)

Typical applications

• Research on plant signaling, stress, and defenses (JA as a reference).

• Agronomy: technical use as a regulator/elicitor (depending on practices and applicable rules).

• Cosmetics: more commonly via jasmonate derivatives (anti-age/skin renewal strategies in development contexts, with substantiated claims).

Quality, grades and specifications

Safety, regulatory and environment

Formulation troubleshooting

Conclusion

Jasmonic acid (JA) is a key plant signaling molecule, most relevant in agronomy and R&D. In cosmetics, direct use of the neat substance is less common than the use of jasmonate derivatives with better formulation manageability and more cosmetic-oriented dossiers. For robust technical use, it is essential to: clearly define the form/CAS (natural vs mixture), control isomer profile and purity (CoA), and validate compatibility and safety on the finished product.

Studies

Jasmonic acid  is a plant hormone that plays an important role in plant defense against insect pests and a natural plant constituent with growth-regulating properties. 

Jasmonic acid (JA) and its derivatives jasmonates (JAs) play a key role in plant metabolic processes and signaling systems when they are in stress and injured from pests (1).

JA and JAs are derived from fatty acid α-linolenic acid through the formation of different intermediates (2)and is found in apples, coffee,  tomato, tobacco and alfalfa leaves, while the esters are present in a kind of jasmine, Jasminum grandiflorum and give it its scent.

Bibliografia__________________________________________

(1) Farmer EE, Ryan CA. Octadecanoid precursors of jasmonic acid activate the synthesis of wound-inducible proteinase inhibitors. Plant Cell. 1992;4:129–34

Abstract. Jasmonic acid and methyl jasmonate have been shown previously to be powerful inducers of proteinase inhibitors in tomato, tobacco, and alfalfa leaves. We show here that when proposed octadecanoid precursors of jasmonic acid, i.e., linolenic acid, 13(S)-hydroperoxylinolenic acid, and phytodienoic acid, were applied to the surfaces of tomato leaves, these compounds also served as powerful inducers of proteinase inhibitor I and II synthesis, a simulation of a wound response. By contrast, compounds closely related to the precursors but which are not intermediates in the jasmonic acid biosynthetic pathway did not induce proteinase inhibitor synthesis. These results suggest that the octadecanoid intermediates may participate in a lipid-based signaling system that activates proteinase inhibitor synthesis in response to insect and pathogen attack.

(2) Bharathi K, Sreenath HL. Identification and Analysis of Jasmonate Pathway Genes in Coffea canephora (Robusta Coffee) by In Silico Approach. Pharmacogn Mag. 2017 Jul;13(Suppl 2):S196-S200. doi: 10.4103/pm.pm_518_16.

Abstract. Background: Coffea canephora is the commonly cultivated coffee species in the world along with Coffea arabica. Different pests and pathogens affect the production and quality of the coffee. Jasmonic acid (JA) is a plant hormone which plays an important role in plants growth, development, and defense mechanisms, particularly against insect pests. The key enzymes involved in the production of JA are lipoxygenase, allene oxide synthase, allene oxide cyclase, and 12-oxo-phytodienoic reductase. There is no report on the genes involved in JA pathway in coffee plants. Objective: We made an attempt to identify and analyze the genes coding for these enzymes in C. canephora. Materials and methods: First, protein sequences of jasmonate pathway genes from model plant Arabidopsis thaliana were identified in the National Center for Biotechnology Information (NCBI) database. These protein sequences were used to search the web-based database Coffee Genome Hub to identify homologous protein sequences in C. canephora genome using Basic Local Alignment Search Tool (BLAST). Results: Homologous protein sequences for key genes were identified in the C. canephora genome database. Protein sequences of the top matches were in turn used to search in NCBI database using BLAST tool to confirm the identity of the selected proteins and to identify closely related genes in species. The protein sequences from C. canephora database and the top matches in NCBI were aligned, and phylogenetic trees were constructed using MEGA6 software and identified the genetic distance of the respective genes. The study identified the four key genes of JA pathway in C. canephora, confirming the conserved nature of the pathway in coffee. The study expected to be useful to further explore the defense mechanisms of coffee plants. Conclusion: JA is a plant hormone that plays an important role in plant defense against insect pests. Genes coding for the 4 key enzymes involved in the production of JA viz., LOX, AOS, AOC, and OPR are identified in C. canephora (robusta coffee) by bioinformatic approaches confirming the conserved nature of the pathway in coffee. The findings are useful to understand the defense mechanisms of C. canephora and coffee breeding in the long run. Summary: JA is a plant hormone that plays an important role in plant defense against insect pests. Genes coding for the 4 key enzymes involved in the production of JA viz., LOX, AOS, AOC and OPR were identified and analyzed in C. canephora (robusta coffee) by in silico approach. The study has confirmed the conserved nature of JA pathway in coffee; the findings are useful to further explore the defense mechanisms of coffee plants. Abbreviations used:C. canephora: Coffea canephora; C. arabica: Coffea arabica; JA: Jasmonic acid; CGH: Coffee Genome Hub; NCBI: National Centre for Biotechnology Information; BLAST: Basic Local Alignment Search Tool; A. thaliana: Arabidopsis thaliana; LOX: Lipoxygenase, AOS: Allene oxide synthase; AOC: Allene oxide cyclase; OPR: 12 oxo phytodienoic reductase.