A new model of carbon and phosphorus transfers in arbuscular mycorrhizas

摘要: Summary • Existing models of nutrient transfer in arbuscular mycorrhizal (AM) symbioses are inadequate as they do not explain the range real responses seen experimentally. A computer simulation model was used to evaluate novel hypotheses that transfers were based solely on symbionts’ internal needs, and carbon phosphorus quantitatively unlinked. To be plausible, simulated plants would show a ±50% variation weight vs nonmycorrhizal controls, with normal response distribution (mimicking data set). • One plant one fungus (AMF) growing soil volume simulated, using C, P nitrogen cycling stoichiometry. C- P-exchange rates independent could varied at will. The tested realistic concentrations full exchange rates. • The showed –20% +55% distributed close normal, suggesting plausible. • The suggests theoretical assumptions about mycorrhizas should reassessed. worked only because symbionts possessed incomplete information their partner environmental conditions. Conventional cost–benefit work under these circumstances, but both mutualistic parasitic interactions successfully simulated.