AAP1 (TRAESCS2B02G266600) — triticum aestivum

Summary

TaAAP1 (TRAESCS2B02G266600) on bread wheat chromosome 2B encodes an amino acid permease with transmembrane transporter activity for L-serine, L-proline, acidic amino acids, L-alanine, L-glutamine, L-glutamate, and neutral amino acids, and symporter activity. It is localized to the plasma membrane and associated with amino acid import, transport of aspartate, tryptophan, and glutamate, as well as response to nitrate, karrikin, and nematodes. TaAAP1 is linked to salt tolerance, nitrogen use efficiency, proline accumulation, storage protein synthesis, and nitrogen content. Associations with seed size, seed yield, plant biomass, photosynthesis, sucrose partitioning, and phloem amino acid composition have been observed for related family members. Studies of related genes in other species connect the family to grain number, tillering, yield, and strigolactone responses, and to calcium-enhanced proline toxicity.