Phosphate starvation: response mechanisms and solutions.

This article focuses on the regulatory mechanisms of phosphorus (P) uptake and signaling in plants, particularly under phosphate (Pi) starvation, and explores genetic engineering strategies to improve crop phosphorus use efficiency. It details how specific root tissues, such as the root apical meristem, lateral root cap, and quiescent center, sense and respond to Pi availability through complex hormonal crosstalk and molecular pathways involving key regulators like PHR1, SPX proteins, and miR399. The review highlights genetic engineering approaches targeting Pi transporter families (e.g., PHT1) and Pi starvation signaling components to enhance Pi uptake, mobilization, and plant growth in species including rice, wheat, and soybean. Additionally, it discusses computational methods for identifying novel genetic targets and emphasizes the potential of integrating tissue-specific and systemic Pi sensing mechanisms to develop sustainable agricultural practices that reduce reliance on phosphorus fertilizers.