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Some assembly required: Modularity and programmability as keys to decoupling growth-defence trade-offs in plants
Rachelle R Q Lee1, Donghui Hu1, Eunyoung Chae2
1Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, 117558, Singapore.
Current Opinion in Plant Biology
|January 15, 2026
Summary
Plants coordinate growth and defense using complex gene networks, not just resource limits. This discovery allows engineering immunity without sacrificing crop yield.
Area of Science:
- Plant immunity
- Molecular plant science
- Genetics and genomics
Background:
- The growth-defense trade-off is traditionally viewed as a consequence of resource competition in plants.
- Recent studies on autoimmune mutants and helper NLRs suggest this paradigm is incomplete.
Purpose of the Study:
- To investigate the regulatory mechanisms plants use to balance growth and defense.
- To challenge the assumption that the growth-defense trade-off is an unavoidable outcome of resource limitation.
Main Methods:
- Meta-analysis of gene expression data across various immune contexts.
- Analysis of regulatory networks centered on the EDS1-PAD4-ADR1 (EPA) complex.
- Investigating the function of ADR1 helper NLRs in regulating growth and defense genes.
Main Results:
- Defense and growth genes are regulated by segregated but coordinated molecular modules.
- ADR1 helper NLRs actively suppress growth genes while enhancing immunity, indicating coordinated regulation, not passive resource competition.
- Networks downstream of ADR1 show significant regulatory exclusivity.
Conclusions:
- Plant growth-defense balance is actively programmed through complex transcriptional networks.
- Targeted genetic interventions can decouple immunity from growth penalties, challenging the zero-sum assumption in crop improvement.
- Understanding these conserved circuits offers opportunities to engineer enhanced plant immunity without yield penalties.
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