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. 2024 Jun 13;15:5059. doi: 10.1038/s41467-024-49504-6

Fig. 7. Proposed model for the role of BnaA07.MKK9 in Sclerotinia stem rot (SSR) resistance.

Fig. 7

Upon S. sclerotiorum challenge, the oilseed rape accessions carrying BnaA07.MKK9Hap0 showed higher kinase activity and enhanced BnaC03.MPK3/6 phosphorylation, while the oilseed rape accessions carrying BnaA07.MKK9Hap1 showed weaker kinase activity and decreased BnaC03.MPK3/6 phosphorylation. As a result, compared with Hap1, Hap0 accessions had earlier and more robust defense responses that initiated biosynthesis of ethylene (ET), camalexin, and indole glucosinolates (IGSs) and promoted accumulation of H2O2 and the hypersensitive response (HR), ultimately resulting in enhanced SSR resistance. The circle with the letter ‘P’ within it represents phosphorylation.