A premature termination codon mutation in the onion <i>AcCER2</i> gene is associated with both glossy leaves and thrip resistance.

ABSTRACT: Plant epicuticular waxes (EW) play a critical role in defending against biotic and abiotic stresses. Notably, onions (Allium cepa L.) present a distinctive case where the mutant with defect in leaf and stalk EW showed resistance to thrips compared with the wild type with integral EW. We identified a premature stop codon mutation in the AcCER2 gene, an ortholog of CER2 gene in Arabidopsis thaliana that has been proved essential for the biosynthesis of very long-chain fatty acids (VLCFAs), in the onions with glossy leaf and stalks in our experiments. The data hinted at the possibility that this mutation might impede the elongation process of VLCFAs from C28 to C32, thereby hindering the production of 16-hentriacontanone, a primary constituent of onion EW. Transcri

SUBMITTER: Lei P 

PROVIDER: S-EPMC11896967 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature