Overview
Methyl jasmonate (MeJA) is an organic compound derived from jasmonic acid, functioning as a key plant hormone in stress responses and developmental processes. First identified in jasmine oil, it has become a crucial tool in plant physiology research and sustainable agriculture. As a volatile signaling molecule, it triggers systemic acquired resistance in plants against pathogens and herbivores. In industrial contexts, MeJA serves dual purposes: as a research chemical for studying plant defense mechanisms and as an active ingredient in biostimulant formulations. Its ability to enhance secondary metabolite production makes it valuable for increasing yields of medicinal compounds in cultivated plants.
Physical and Chemical Properties
Methyl jasmonate exists as a viscous liquid with a characteristic floral odor at room temperature. Its molecular structure contains a cyclopentanone ring with ester and pentenyl side chains, contributing to both its volatility and biological activity. The compound shows moderate stability but may polymerize under prolonged exposure to light or elevated temperatures. Chemically, MeJA is an ester that undergoes hydrolysis in alkaline conditions. Its vapor pressure (0.003 mmHg at 25°C) enables airborne signaling between plants. The compound exhibits chiral properties, with the (1R,2R) isomer being biologically active. Analytical characterization typically involves GC-MS or HPLC methods due to its UV absorption at 210-220 nm.
Main Applications
In agriculture, MeJA is increasingly used as an elicitor to boost production of valuable phytochemicals. Commercial applications include enhancing taxol yields in yew cell cultures, increasing resveratrol content in grapes, and improving essential oil production in aromatic crops. Field trials demonstrate improved pest resistance in crops like tomato and maize when treated with MeJA formulations. The fragrance industry utilizes MeJA as a high-value component in perfumery, contributing floral and jasmine-like notes. Pharmaceutical researchers employ it as a precursor for prostaglandin analogs and other bioactive molecules. Recent developments explore its potential in postharvest treatments to extend shelf life of fruits and vegetables.
Safety and Storage
While not classified as acutely toxic, methyl jasmonate requires careful handling due to its irritant properties. Appropriate personal protective equipment (nitrile gloves, safety goggles) should be worn during handling. Spills should be contained with absorbent materials and disposed as organic waste. Long-term storage stability requires protection from oxidation. Best practice involves aliquoting into small, nitrogen-purged amber glass containers with PTFE-lined caps. Under these conditions, the compound typically maintains stability for 2-3 years. Commercial formulations for agricultural use often include stabilizers and delivery systems to enhance field performance.
B2B Procurement Guide
When sourcing methyl jasmonate for industrial or research use, prioritize suppliers providing certificate of analysis with purity verification (typically ≥95% by HPLC). Technical grade (80-90% purity) may be suitable for agricultural applications but requires efficacy testing. Bulk quantities (25kg+) often offer better value for large-scale use. Key procurement considerations include: supply chain reliability (as production is limited to specialized chemical manufacturers), packaging specifications (preferably nitrogen-flushed containers), and regulatory compliance documentation. Some suppliers offer custom formulation services for specific agricultural applications, which may warrant evaluation for field use scenarios.
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