Arbuscular mycorrhizal fungi enhance aluminium resistance of broomsedge (Andropogon virginicus L.).

摘要: In the eastern United States, broomsedge (Andropogon virginicus L.) is found growing on abandoned coal-mined lands that have extremely acidic soils with high residual aluminium (Al) concentrations. Broomsedge may be inherently metal-resistant and nutrient-efficient or rely arbuscular mycorrhizal (AM) fungal association to overcome limitations such sites. plants were grown without an ecotype AM consortium exposed controlled levels of Al in two experiments. The conferred resistance broomsedge. Arbuscular fungi reduced uptake translocation host plants, potentially reflecting measured reductions inorganic availability rhizosphere plants. Mycorrhizal exhibited lower shoot P concentrations, higher phosphorus use efficiency, root acid phosphatase rates than non-mycorrhizal Aluminium significantly calcium (Ca) magnesium (Mg) tissue concentrations both However, plant response any change nutrient acquisition was substantially less pronounced exclusion greater stability biomass accretion-tissue relationships important mechanisms allow grow unfavourable soils.