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<p>NRT2-family nitrate transporters are key to high-affinity nitrate uptake in plants, but growing evidence reveals broader roles beyond transport. In this commentary, we highlight the new insights about dual-functionality of AtNRT2.4 in <i>Arabidopsis thaliana</i>, focusing on recent findings by Zhang et al. (<CitationRef CitationID="CR19">2025</CitationRef>). Their work demonstrates the unique ability of ATNRT2.4 to integrate local and systemic nitrogen signals, remodel root architecture, and influence anthocyanin biosynthesis. Unlike canonical members of NRT-2 family such as AtNRT2.1, AtNRT2.4 operates independently of the C-terminally encoded peptide (CEP) signaling pathway and the AtNRT3.1 chaperone. We contextualize these findings within the nitrate signaling network and discuss their relevance for nutrient management and crop improvement demonstrates its unique ability to integrate local and systemic nitrogen signals, remodel root architecture, and influence anthocyanin biosynthesis.</p>

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The Sensing Switch: How AtNRT2.4 Couples Nitrate Uptake with Plant Signaling

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Anil Kumar,
  • Marwa Batnini,
  • Fuyu Li

摘要

NRT2-family nitrate transporters are key to high-affinity nitrate uptake in plants, but growing evidence reveals broader roles beyond transport. In this commentary, we highlight the new insights about dual-functionality of AtNRT2.4 in Arabidopsis thaliana, focusing on recent findings by Zhang et al. (2025). Their work demonstrates the unique ability of ATNRT2.4 to integrate local and systemic nitrogen signals, remodel root architecture, and influence anthocyanin biosynthesis. Unlike canonical members of NRT-2 family such as AtNRT2.1, AtNRT2.4 operates independently of the C-terminally encoded peptide (CEP) signaling pathway and the AtNRT3.1 chaperone. We contextualize these findings within the nitrate signaling network and discuss their relevance for nutrient management and crop improvement demonstrates its unique ability to integrate local and systemic nitrogen signals, remodel root architecture, and influence anthocyanin biosynthesis.