ArticlePlanta2026
AMMONIUM TRANSPORTER1.1 (AMT1.1) variation contributes to feedback inhibition of ammonium uptake that differs between domesticated and wild tomato species.
Article in Planta, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
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conclusionNatural variation in SlAMT1.1 among wild tomatoes may influence post-translational regulation, allowing sustained ammonium uptake under high N supply and providing alleles that can be employed to improve N uptake efficiency in crops. Cultivated plants, particularly tomato (Solanum lycopersicum), require substantial nitrogen (N) inputs to achieve high commercial yields. This demand often leads to the excessive application of costly N-based fertilizers during cultivation. Wild tomato species represent valuable genetic resources for enhancing N uptake efficiency. In many plants, ammonium is the preferred N source, transported by proteins of the AMMONIUM TRANSPORTERS (AMT) family. Here, we characterized the extensive genetic diversity of an AMT1.1 ortholog across both cultivated and distantly related wild tomato species. Phylogenetic and diversity analyses revealed marked divergence in the SlAMT1.1 sequence between cultivated tomato accessions and wild Solanum (section Lycopersicon) species. Comparative analyses of SlAMT1.1 alleles from the Arcanum and Neolycopersicon groups showed enhanced uptake of
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