Original ResearchPublished 9 October 2026Cross-species transcriptomic plasticity and root architectural adaptations in Brachypodium ( Brachypodium distachyon ) and barley ( Hordeum vulgare ) genotypes under different ammonium and nitrate availabilityHamid Rouina · Dilkaran Singh · Christopher Arlt · Amy Marshall-Colon · Benjamin StichFrontiers in Plant Sciencedoi 10.3389/fpls.2026.1916213