Solute uptaken by a single hypha from a soil pore
More than 80％ of all terrestrial plants form mycorrhizas. The contribution of external fungal hyphae to plant phosphorus nutri-tion can be considerable. Mathematical models of plant nutrient uptake that consider solute uptake by a growing external fungal mycelium are scarce. We developed mathematical models of phosphorus uptake by a single hypha from a continuum soil and from a soil pore. Such models are prerequisites for the creation of a sink term of mycelial uptake in a plant nutrient uptake model. Model analysis reveals that the differences between the two assumptions are large. Cumulative uptake of one unit length of hypha of radius 5×10<4> cm after 5 h is 4. 55×10<7> mmol for the bounded soil pore model and 7. 50×10<6> mmol for the continuum soil model. These results highlight the need for experiments on the single hypha scale, where influxes into or concentration profiles around single hyphae are measured. Model corroboration using such data would provide insight into the fundamental mechanisms of hyphal contribution to plant phosphorus uptake.
mathematical model arbuscular mycorrhiza phosphorus uptake
A. Schnepf T. Roose
Institute of Soil Science, Department of Forest and Soil Sciences, BOKU-University of Natural Resour Oxford Centre for Industrial and Applied Mathematics and Centre for Mathematical Biology, Mathematic
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
552-553
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）