growth-immunity-tradeoff
The growth-immunity tradeoff is the biological principle that plants cannot simultaneously maximize both growth and immune defense, as these processes compete for limited cellular resources and energy. This tradeoff is fundamental to plant physiology, shaping how organisms allocate resources between developmental processes and pathogenic resistance. Understanding this constraint is essential for agriculture and breeding, as it explains the performance variations of crops under different environmental and disease pressure conditions.
PubMed · 2026-03-24
Researchers discovered how plant viruses manipulate a protein called IAA16 to simultaneously suppress plant growth and disease defenses. This finding reveals a potential target for breeding crops that maintain both vigor and disease resistance, addressing a major constraint in agriculture.
The viral βC1 protein blocks the degradation of IAA16 protein by inhibiting ATL52-mediated ubiquitination, allowing viruses to suppress plant defenses.
IAA16 acts as a dual negative regulator controlling both growth-promoting auxin signals and immunity-boosting salicylic acid signals.
The viral manipulation mechanism is conserved across plant species, including tomato, suggesting broad applicability for crop improvement strategies.
