Excess salicylic acid mediates graft incompatibility by repressing auxin-dependent vascular reconnection in tomato
Ruiduo Han, Kaiwei Meng, Xiujuan Wang, Kaili Mao, Zefeng Chen, Xiaojian Xia, Huijia Kang, Yanhong Zhou, Hannah Rae Thomas
Salicylic acid (SA) overaccumulates in tomato-pepper graft rootstocks alongside suppressed auxin; exogenous SA phenocopies failed xylem reconnection, while SA-deficient nahG tomato self-grafts also fail.
bioRxiv · Aug 7, 2026 · PreprintPlant Biology✦ In-depth digest