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Updated: Jun 20, 2026

Wide-Field, Real-Time Imaging of Local and Systemic Wound Signals in Arabidopsis
Published on: June 4, 2021
Tomato BRI1 and systemin wound signalling
Nicholas Holton1, Kate Harrison, Takao Yokota
1Division of Biology; Imperial College London; Wye Campus; Ashford, Kent, UK.
Abstract:
Brassinosteroids (BRs) are perceived by Brassinosteroid Insensitive 1 (BRI1), that encodes a leucine-rich repeat receptor kinase. Tomato BRI1 has previously been implicated in both systemin and BR signalling. The role of tomato BRI1 in BR signalling was confirmed, however it was found not to be essential for systemin/wound signalling. Tomato roots were shown to respond to systemin but this response varied according to the species and growth conditions. Overall the data indicates that mutants defective in tomato BRI1 are not defective in systemin-induced wound signalling and that systemin perception can occur via a non-BRI1 mechanism.
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