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Updated: Jul 16, 2026

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Published on: July 22, 2017
Systemin regulates both systemic and volatile signaling in tomato plants
G Corrado1, R Sasso, M Pasquariello
1Dipartimento di Scienze del Suolo della Pianta e dell'Ambiente, Università degli Studi di Napoli Federico II, 80055, Portici, Naples, Italy.
Systemin peptide in tomato plants triggers defenses against pests. This single gene activates both direct and indirect resistance, enhancing plant protection and attracting beneficial insects.
Area of Science:
- Plant biology
- Chemical ecology
- Molecular genetics
Background:
- Plants activate defense mechanisms upon pest attack.
- Systemin, an 18 amino acid peptide, is a known signal for direct resistance in tomato.
- Transgenic prosystemin expression induces genes related to herbivore response.
Purpose of the Study:
- To investigate systemin's role in indirect defense mechanisms in tomato.
- To determine if systemin mediates the systemic activation of plant defenses against pests.
Main Methods:
- Behavioral analysis of plant-insect interactions.
- Chemical analysis of volatile compounds.
- Gene expression profiling.
Main Results:
- Systemin enhances the production of bioactive volatile compounds.
- Systemin increases tomato plant attractiveness to parasitoid wasps.
- Systemin activates genes associated with volatile production.
Conclusions:
- Systemin is involved in the systemic activation of indirect defense in tomato.
- A single gene (prosystemin) controls the systemic activation of coordinated plant defense responses against pests.
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