What question did this study set out to answer?

The study aims to uncover how nitrate and ammonium influence soybean nodulation and root development at the metabolic and molecular levels.

Multi-omics reveals metabolic reprogramming underlying differential modulation of nodulation and root development by nitrate and ammonium in soybean

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Randomized trial evaluates nitrogen source effects on root and nodulation development, suggesting new metabolic insights.

The study aims to uncover how nitrate and ammonium influence soybean nodulation and root development at the metabolic and molecular levels.
Evaluated root and nodulation phenotypes under NH₄Cl or KNO₃ treatments.
Analyzed transcriptional and metabolomic responses at varying nitrogen concentrations.
Conducted integrated multi-omics analysis to assess differential regulatory effects on key metabolites.
High concentrations of NH₄Cl suppressed nodulation but increased root growth, while KNO₃ had a similar effect with greater potency.
Ammonium treatment boosted nitrogen assimilation and impacted flavonoid biosynthesis negatively.
Nitrate activated defense pathways while inhibiting central carbon metabolism, suggesting distinct metabolic adjustments.

Xu et al. (2026) studied this question.

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