Tracer distribution in legume roots and soluble rhizodeposits over a few weeks after a triple isotope (13C, 15N, 33P) labeling
Résumé
Belowground carbon (C), nitrogen (N) and phosphorus (P) inputs by plants via roots and rhizodeposition are key drivers of these elements cycling in soils. Tracing and quantification of rhizodeposition using isotope enrichment techniques is based on assumptions that have not simultaneously been tested for C, N and P. Our objectives were: (i) to compare the elemental and isotopic composition (IC) of roots and soluble rhizodeposits for C, N and P; and (ii) to compare the IC of root segments of different ages to assess the homogeneity of root system labeling.
Auteurs, date et publication :
Auteurs Pierre Stevenel , Samuel Abiven , Emmanuel Frossard , Idupulapati M. Rao , Federica Tamburini , Astrid Oberson
Publication : Plant and Soil
Date : 2025
Volume : 513
Issue : 1
Pages : 649-671