Aug 2026· Journal of Agricultural and Food Chemistry· Vol 74 33, pp.
25935-25949
· 0 citations· 62 references
Medicine
TL;DR
Three P4-ATPase flippase homologues aminophospholipid ATPase 3 in flowering Chinese cabbage that function as sensitive targets for PCZ are identified and provide a precise molecular target for developing PCZ-free germplasm in flowering Chinese cabbage through gene editing.
Abstract
In agriculture, propiconazole (PCZ) controls excessive growth in flowering Chinese cabbage but poses dietary safety risks due to residue accumulation. Therefore, identifying novel PCZ targets and breeding PCZ-free cultivars is critical for the safe production of flowering Chinese cabbage. Here, we identified three P4-ATPase flippase homologues aminophospholipid ATPase 3 (BraALA3a/b/c) in flowering Chinese cabbage that function as sensitive targets for PCZ. These proteins exhibit high binding affinity for PCZ, which directly inhibits their ATPase activity. Overexpression of the BraALA3 homologues enhanced plant growth and increased sensitivity to PCZ, whereas knockdown led to dwarfism and reduced sensitivity. Based on these findings, we identified editable active sites via protoplast-based screening. Genetic transformation of one such site yielded BraALA3a/braala3aK200T mutant lines, which displayed a dwarf and compact architecture. These findings provide a precise molecular target for developing PCZ-free germplasm in flowering Chinese cabbage through gene editing.
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