The primary nitrogen metabolism of the N2-fixing root nodule symbiosis Alnus incana (L.)- Frankia was investigated by 31P and 15N nuclear magnetic resonance (NMR) spectroscopy. Perfusion of root nodules in a pulse-chase approach with 15N- or 14N-labeled NH4+ revealed the presence of the amino acids
Symbiosis established between actinorhizal plants and Frankia spp., which are nitrogen-fixing actinobacteria, promotes nodule organogenesis, the site of metabolic exchange. The present study aimed to identify amino acid markers involved in Frankia-Alnus interactions by comparing
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