The biology of mycorrhiza in the Ericaceae: XVII. The role of mycorrhizal infection in the regulation of iron uptake by ericaceous plants.
G Shaw, JR Leake, AJM Baker, DJ Read
New Phytologist | Published : 1990
The role of the ericoid mycorrhizal endophyte Hymenoscyphus ericae (Read) Korf & Kernan in the regulation of iron uptake by ericaceous plants is investigated. Growth of the fungus is not inhibited in solution cultures containing a range (0-144 [ig ml-1 ) of iron concentration ([Fe]ext ) typical of those obtained in extracts from heathland soil. Absorption of iron by the fungus occurs rapidly at low [Fe]ext but more slowly as [Fe]ext increases. Concentrations of iron in the mycelium ([Fe]mye ), reach 6000μg g-1 dry weight. Mycorrhizal (M) roots of Vaccinium macrocarpon Ait. and Calluna vulgaris L. (Hull) showed a very high affinity for iron at low [Fe]ext , a feature not shown by non-mycorrhi..View full abstract