How root growth is stimulated by nitrate: Researchers decipher signaling chain
Phys.org
February 20, 2026
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Researchers have uncovered a key gene responsible for regulating root growth in response to nitrate levels in plants. By studying 200 natural variants of Arabidopsis thaliana, a model plant widely used in scientific research, they discovered significant differences in lateral root formation when grown in nitrate-rich environments. The genetic analysis pointed to MEKK14, a gene involved in cell signaling pathways, as the main factor influencing these variations.
The study revealed that MEKK14 plays a crucial role in mediating the plant's response to high nitrate concentrations. This gene helps regulate the growth of lateral roots, which are essential for nutrient uptake and overall plant stability. The findings suggest that MEKK14 acts as a central controller, integrating environmental signals with cellular responses to optimize root architecture.
Understanding how plants respond to nitrogen is vital for improving crop yields and sustainability in agriculture. Nitrogen is a critical nutrient for plant growth, but excessive use of nitrate fertilizers can lead to environmental issues like water pollution. This discovery could pave the way for developing crops that more efficiently utilize nitrate, reducing waste and enhancing productivity.
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Originally published on Phys.org on 2/20/2026