A VLCFAs–auxin regulatory module modulates root morphogenesis in apple

作者：Huai‐Na Gao, Meng-Ru Li, Si-Ji Fang, Rui-Han Qi, Xiao-yang Lv, Min-Min Zhou, Yanhui Lv, Shang Wu, Yali Zhang, Han Jiang, Y Li · 发表于：Horticulture Research · 年份：2026 · DOI：10.1093/hr/uhag168 · 研究领域：Plant Molecular Biology Research、Polysaccharides and Plant Cell Walls、Tree Root and Stability Studies

Abstract Root elongation is a key adaptive trait that enables plants to respond to soil conditions and is jointly regulated by auxin signaling and very long-chain fatty acids (VLCFAs). However, the molecular mechanism underlying this pathway remains unclear in apple. In this study, we elucidate the roles and regulatory relationship between auxin and VLCFAs biosynthesis in apple. VLCFAs accumulation increases auxin levels in roots, reduces the expression of IAA-related genes, and promotes root morphogenesis. This interaction refines the conventional view of auxin as the sole regulator of root development and reveals a synergistic auxin-VLCFAs regulatory network that integrates hormonal signaling with metabolic control.