Interdependence of phosphorus, nitrogen, potassium and magnesium translocation by the ectomycorrhizal fungus Paxillus involutus

2001 | journal article. A publication with affiliation to the University of Göttingen.

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​Interdependence of phosphorus, nitrogen, potassium and magnesium translocation by the ectomycorrhizal fungus Paxillus involutus​
Jentschke, G.; Brandes, B.; Kuhn, A. J.; Schroder, W. H. & Godbold, D. L.​ (2001) 
New Phytologist149(2) pp. 327​-337​.​ DOI: https://doi.org/10.1046/j.1469-8137.2001.00014.x 

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Authors
Jentschke, G.; Brandes, B.; Kuhn, A. J.; Schroder, W. H.; Godbold, Douglas L.
Abstract
Translocation is shown of phosphorus, nitrogen, potassium and magnesium to a P-deficient host from ectomycorrhizal fungal hyphae. Mycorrhizal (with Paxillus involutus) and nonmycorrhizal P-deficient spruce (P. abies) seedlings were grown in a two-compartment sand-culture system. Hyphal translocation of nutrients from the inner compartment (penetrated only by hyphae) to the host was measured using mass balance (for N, P and K) or stable isotope ((15)N and (25)Mg) methods. Addition of P to the hyphal compartment strongly stimulated hyphal growth, and this also increased both seedling P status and growth. Hyphae translocated nonlimiting elements in addition to P, contributing 52, 17, 5 and 3-4%, respectively, to total P, N, K or Mg plant uptake. The potential role of the ectomycorrhizal mycelium in K acquisition was demonstrated. Translocation to mycorrhizal seedings of N, K and Mg was strongly reduced when hyphal P-fluxes ceased; this translocation of nonlimiting nutrients depended on simultaneous translocation of P. The ectomycorrhizal mycelium has an active role in P acquisition from sources not available to roots. Nutrient fluxes within fungal hyphae are interdependent and strong coupling of N, K and Mg fluxes with long-distance P translocation in the mycorrhizal mycelium occurs.
Issue Date
2001
Status
published
Publisher
Wiley-blackwell Publishing, Inc
Journal
New Phytologist 
ISSN
0028-646X

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