Plant Volatile Methyl Salicylate Primes Wheat Defense Against the Grain Aphid by Altering the Synthesis of Defense Metabolites.

Methyl salicylate primes wheat defenses by increasing resistance to grain aphids and attracting parasitoids, with 2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one playing a key role.

• Why it matters: Understanding how plant volatiles activate defense mechanisms can lead to sustainable crop protection strategies, addressing the significant threat aphids pose to wheat yields worldwide.
• What they did: Researchers applied methyl salicylate to wheat and analyzed its effects through insect bioassays, hormone and metabolite measurements, and transcriptome analysis, focusing on defense-related pathways and volatile emissions.
• The result: Methyl salicylate treatment enhanced wheat resistance by boosting defense metabolites and attracting parasitoids, suggesting its potential as a natural phytoprotectant for sustainable agriculture.