Molecular switches could let crops grow big and stay tough
Li H, Zhang Z, Liu F, Wang H, He Z
Crop Improvement
Every tomato plant that wilts under drought stress while a weed nearby thrives is playing out the same growth-versus-defense tug-of-war scientists are now learning to rewire in crops.
Plants constantly have to choose between putting energy into growing bigger or defending themselves against stress and disease, and they can't always do both well. This review looks at a group of proteins that act like internal switches controlling that trade-off, and explains how breeders might tweak them to get plants that grow well and resist stress at the same time.
Key Findings
G proteins function as central molecular switches that link plant growth, development, and stress adaptation pathways.
Elite gene variants (alleles) of G proteins have already been identified and used in molecular breeding programs.
The same proteins often control multiple traits at once (pleiotropy), causing a 'growth-resistance decoupling' problem that limits breeding progress.
chevron_right Technical Summary
Scientists reviewed how a family of plant proteins called G proteins act as switches that balance growth against stress defense, and they're using this knowledge to breed crops that can be both high-yielding and tough.
Abstract Preview
Original paper
Plant G proteins: Versatile signaling hubs for synergistic improvement of agronomic traits.
Prioritizing defense responses often restricts growth and yield, forming a growth-defense conflict that limits crop productivity and threatens global food security. Traditionally attributed to reso...
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Plant signaling encompasses the molecular and cellular mechanisms by which plants perceive and respond to environmental changes, hormonal signals, and stress conditions. These signaling pathways regulate fundamental biological processes including growth, development, nutrient acquisition, and
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