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The SlMYC2-SlNAC72-SlMIEL1 module contributes to high-temperature tolerance in tomato by regulating jasmonic acid
Xiangguang Meng1,2,3, Zhen Kang1,2,3, Guo Chen1,2,3
1College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China.
Plant Physiology
|January 29, 2026
Summary
Tomato
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Global climate change increases extreme high-temperature events, threatening ecosystems and agriculture.
- NAC transcription factors (NAC TFs) are crucial for plant stress responses, including temperature changes.
Purpose of the Study:
- To investigate the role of SlNAC72 in tomato's response to high-temperature stress.
- To elucidate the molecular mechanism regulating jasmonic acid (JA) biosynthesis under heat stress.
Main Methods:
- Gene expression analysis
- Biochemical assays
- Protein-protein interaction studies
- Gene knockout and overexpression studies
Main Results:
- SlNAC72 negatively regulates heat tolerance by inhibiting JA biosynthesis.
- SlAOS1 positively regulates JA biosynthesis and heat tolerance.
- SlMIEL1 enhances heat tolerance by promoting SlNAC72 degradation.
- SlMYC2 suppresses SlNAC72 expression, impacting JA levels.
Conclusions:
- The SlMYC2-SlNAC72-SlMIEL1 module is central to regulating JA biosynthesis and tomato heat tolerance.
- Understanding this pathway offers targets for improving crop resilience to heat stress.
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