Context and Overall Objectives
Phosphorus is one of the most important nutrients for plant growth, yet it is often scarce in agricultural soils. To compensate, farmers rely on large amounts of chemical fertilizers, which are expensive, environmentally harmful, and unsustainable in the long term. At the same time, the global demand for food continues to increase, making it urgent to find alternative strategies for nutrient-efficient and climate-resilient agriculture.
White lupin (Lupinus albus), a legume crop, has developed a remarkable natural strategy to thrive in nutrient-poor soils. It produces specialized “cluster roots,” which enhance its ability to capture phosphorus from the environment. Understanding the molecular processes behind this adaptation could open new pathways to improve crop resilience and reduce fertilizer dependency.
Recent discoveries have shown that small molecules called microRNAs, along with other non-coding RNAs, play key roles in regulating plant development and stress responses. However, their role in cluster root formation and nutrient uptake is still poorly understood. Traditional genetic approaches to study these molecules are slow and rely on transgenic plants, which face limitations in terms of technical feasibility, regulatory acceptance, and scalability.
The LUMIROOT project seeks to overcome these barriers by combining advanced molecular biology, bioinformatics, and innovative nanotechnological approaches to deliver RNA into plants without genetic modification. This strategy will help unravel how plants sense and respond to phosphorus limitation, and how root systems can be tuned to improve nutrient use efficiency.
The project’s objectives are to:
Clarify the regulatory functions of microRNAs in cluster root formation under phosphorus-deficient conditions.
Develop RNA-based nanotechnology as a safe and non-transgenic tool for gene function analysis in crops.
Build systems-level models linking microRNAs with the key genes that control root architecture.
Share findings with the agricultural sector, breeders, and rural communities, to translate scientific knowledge into sustainable practices.
By generating new insights into plant adaptation to nutrient limitation, LUMIROOT contributes to the EU’s goals of reducing dependence on fertilizers, preserving soil health, and supporting a transition towards greener and more resilient agriculture.
