MeJA inhibits fungal growth and DON toxin production by interfering with the cAMP-PKA signaling pathway in the wheat scab fungus <i>Fusarium graminearum</i>.

ABSTRACT: Deoxynivalenol (DON), a mycotoxin primarily produced by Fusarium species, is commonly found in cereal grains and poses risks to human and animal health, as well as global grain trade. This study demonstrates that methyl jasmonate (MeJA), a natural plant hormone, inhibits the growth and conidiation of Fusarium graminearum. Importantly, MeJA significantly reduces DON production by suppressing TRI gene expression and toxisome formation. To explore the molecular mechanism, we identified MeJA-tolerant mutants, including a transcription factor MRT1 and cAMP-PKA pathway-related genes (FgGPA1 and FgSNT1). MeJA treatment reduced PKA activity and intracellular cAMP levels in F. graminearum, suggesting it targets the cAMP-PKA pathway. Notably, the MeJA

SUBMITTER: Duan K 

PROVIDER: S-EPMC11898702 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature