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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.
Plant Signaling & Behavior
|August 26, 2009
Summary
Tomato Brassinosteroid Insensitive 1 (BRI1) is crucial for brassinosteroid signaling but not essential for systemin-induced wound responses. Systemin perception in tomato roots can occur through a mechanism independent of BRI1.
Area of Science:
- Plant molecular biology
- Plant hormone signaling
- Plant-environment interactions
Background:
- Brassinosteroids (BRs) are vital plant hormones involved in growth and development.
- Brassinosteroid Insensitive 1 (BRI1) is the primary receptor for BRs, functioning as a leucine-rich repeat receptor kinase.
- Tomato BRI1 has been previously suggested to play roles in both BR and systemin signaling pathways.
Purpose of the Study:
- To investigate the specific role of tomato BRI1 in brassinosteroid (BR) signaling.
- To determine if tomato BRI1 is essential for systemin-induced wound signaling.
- To explore the mechanism of systemin perception in tomato roots.
Main Methods:
- Utilizing mutants defective in tomato BRI1.
- Analyzing the response of these mutants to brassinosteroids.
- Assessing the systemin-induced wound signaling pathway in tomato plants.
- Investigating root responses to systemin under varying species and growth conditions.
Main Results:
- The role of tomato BRI1 in BR signaling was confirmed.
- Mutants defective in tomato BRI1 did not show defects in systemin-induced wound signaling.
- Tomato roots demonstrated responsiveness to systemin, with variations observed based on species and growth conditions.
- Evidence suggests systemin perception can occur independently of BRI1.
Conclusions:
- Tomato BRI1 is essential for brassinosteroid signaling but dispensable for systemin-induced wound signaling.
- Systemin perception in tomato plants involves a non-BRI1 dependent pathway.
- Plant hormone signaling pathways can exhibit crosstalk and distinct receptor mechanisms.
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