Jasmonate signaling modulates root growth by suppressing iron accumulation during ammonium stress

• DOI: 10.1093/plphys/kiae390
• Publication Date: 2024-07-25T02:44:40Z
• Authors: Anshika Pandey; Loitongbam Lorind...; Shreya Gupta; Priti Prasad; Kanupriya Agrwal; Mehar Hasan Asif; Ajay Kumar Pandey; Kaustav Bandyopad...; Amar Pal Singh
• Keywords: Jasmonate

Abstract Plants adapt to changing environmental conditions by adjusting their growth physiology. Nitrate (NO3−) and ammonium (NH4+) are the major inorganic nitrogen forms for plant uptake. However, high NH4+ inhibits growth, roots undergo striking changes, such as inhibition of cell expansion division, leading reduced root elongation. In this work, we show that modulates metabolism developmental physiology inhibiting iron (Fe)-dependent Jasmonate (JA) signaling response in Arabidopsis (Arabidopsis thaliana). Transcriptomic data suggested availability regulates Fe JA-responsive genes. High levels led enhanced accumulation, which impaired balance suppressing JA biosynthesis response. Integrating pharmacological, physiological, genetic experiments revealed involvement Fe-derived responses regulating through modulation pathway during stress. The transcription factor MYC2 directly bound promoter NITRATE TRANSPORTER 1.1 (NRT1.1) repressed it optimize NH4+/Fe-JA adaptation Our findings illustrate intricate between nutrient hormone-derived pathways appear essential optimizing physiological metabolic NH4+/Fe