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<p>Amino acid permeases (AAPs) are transporters involved in the uptake, transport, and remobilization of amino acids across various plant tissues and play a vital role in nitrogen metabolism and plant development. This review presents recent findings on the function and regulation of AAPs in various plant species, highlighting their roles in seed development, grain yield, grain quality, response to abiotic stresses (e.g., drought, salinity, nutrient stress) and biotic stresses (e.g., nematode infestations, verticillium wilt), source-sink transport, hormonal crosstalk, senescence and N use efficiency (NUE). Functional characterization of AAPs through overexpression and knockout mutants has provided insights into their specific contributions to amino acid homeostasis and stress response. This review aims to unleash the potential of AAPs in improving NUE and crop yield, with future studies focusing on the complex interplay between AAPs, phytohormonal signalling, and metabolic pathways. Profound knowledge of AAP-mediated processes will enhance crop improvement strategies to increase yield and resilience in agricultural systems.</p>

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Amino acid permeases (AAP) family of amino acid transporters influences source-sink relations, nitrogen response and stress adaptation in plants

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • Haritha Si,
  • Lekshmy Sathee

摘要

Amino acid permeases (AAPs) are transporters involved in the uptake, transport, and remobilization of amino acids across various plant tissues and play a vital role in nitrogen metabolism and plant development. This review presents recent findings on the function and regulation of AAPs in various plant species, highlighting their roles in seed development, grain yield, grain quality, response to abiotic stresses (e.g., drought, salinity, nutrient stress) and biotic stresses (e.g., nematode infestations, verticillium wilt), source-sink transport, hormonal crosstalk, senescence and N use efficiency (NUE). Functional characterization of AAPs through overexpression and knockout mutants has provided insights into their specific contributions to amino acid homeostasis and stress response. This review aims to unleash the potential of AAPs in improving NUE and crop yield, with future studies focusing on the complex interplay between AAPs, phytohormonal signalling, and metabolic pathways. Profound knowledge of AAP-mediated processes will enhance crop improvement strategies to increase yield and resilience in agricultural systems.