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000046874 084__ $$2WoS$$aPlant Sciences
000046874 1001_ $$0P:(DE-HGF)0$$aJentschke, G.$$b0
000046874 245__ $$aInterdependence of phosphorus, nitrogen, potassium and magnesium translocation by the ectomycorrhizal fungus Paxillus involutus
000046874 260__ $$aOxford [u.a.]$$bWiley-Blackwell$$c2001
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000046874 520__ $$aTranslocation 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 (N-15 and Mg-25) 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.
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000046874 65320 $$2Author$$aexternal mycelium
000046874 65320 $$2Author$$amagnesium translocation
000046874 65320 $$2Author$$anitrogen translocation
000046874 65320 $$2Author$$aPaxillus involutus
000046874 65320 $$2Author$$aphosphorus translocation
000046874 65320 $$2Author$$aPicea abies
000046874 65320 $$2Author$$apotassium translocation
000046874 7001_ $$0P:(DE-HGF)0$$aBrandes, B.$$b1
000046874 7001_ $$0P:(DE-Juel1)129349$$aKuhn, A. J.$$b2$$uFZJ
000046874 7001_ $$0P:(DE-Juel1)VDB1472$$aSchröder, W. H.$$b3$$uFZJ
000046874 7001_ $$0P:(DE-HGF)0$$aGobold, D. L.$$b4
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