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Science & ResearchAug 7, 2026

Excess salicylic acid mediates graft incompatibility by repressing auxin-dependent vascular reconnection in tomato

Graft incompatibility limits the combination of scion and rootstock, yet the signals that block vascular reconnection remain poorly understood.

Graft incompatibility limits the combination of scion and rootstock, yet the signals that block vascular reconnection remain poorly understood. Using incompatible tomato-pepper grafts, we show that salicylic acid (SA) over accumulates at the graft junction, predominantly in the…

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