Methyl Jasmonate Seed Priming Mitigates the Defence-Growth Trade-Off and Tailors Plant Response to Specific Pests.

Methyl jasmonate seed priming enhances pest-specific plant defenses in Arabidopsis thaliana without fitness costs, by fine-tuning molecular responses.

• Why it matters: Understanding how to boost plant defenses without compromising growth is crucial for sustainable pest management, addressing the trade-off between defense and fitness.
• What they did: The study applied seed priming with methyl jasmonate and used a -omics approach to analyze molecular changes, revealing mechanisms that enable enhanced defense responses.
• The result: Primed plants showed increased resistance, characterized by specific molecular responses such as reduced stomatal aperture and activation of the phenylpropanoid pathway, enabling targeted defense without growth penalties.