Ericoid mycorrhizal fungi from heavy metal polluted soils: their identification and growth in the presence of zinc ions

By E. Martino, K. Turnau, M. Girlanda, Paola Bonfante, S. Perotto. 2000

105 citations recorded by the source corpus.

Ericoid mycorrhizal fungi can alleviate heavy metal toxicity to their host plant, but the mechanisms that lie behind this increased tolerance are unknown. As a first step in the characterisation of two isolates of Oidiodendron maius from mycorrhizal roots of Vaccinium myrtillus growing in heavily contaminated soils, we investigated their taxonomic position, their mycorrhizal capabilities and their ability to grow in the presence of heavy metals. When growth was compared with isolates from non-polluted soils, a better performance was observed in the presence of increasing concentrations of zinc salts, especially at higher ion concentrations. The mechanisms of tolerance may include the production of mucilage and extracellular pigments.

Subfields: Ecology, Evolution, Behavior and Systematics, Plant Science, Pollution

View Paper: https://www.semanticscholar.org/paper/13287be361d69ced6ba445d9ecd40a66d1e66902

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In Ecology, Evolution, Behavior and Systematics

In Plant Science

In Pollution

Citations in the corpus

Role of Mycorrhizal Symbioses in Phosphorus Cycling (2011, background): “2008) and heavy metals (Joner et al. 2000; Martino et al. 2000; Sharples et al. 1999; Sudová et al. 2008), while maintaining the P and/or zinc supply to the plants (Joner et al.”
Ericoid mycorrhiza: a partnership that exploits harsh edaphic conditions (2003, background): “ericae (Meharg & Cairney, 2000) and recently obtained data for another ericoid mycorrhizal endophyte (Oidodendron maius) indicate that these fungi can also evolve adaptive resistance to zinc in contaminated soils (Martino et al., 2000).”
Influence of adverse soil conditions on the formation and function of Arbuscular mycorrhizas (2002, background): “…of metals in a given soil, and the degree of host plant mycorrhizal dependence have also been reported to affect extent of plant uptake of, and tolerance to, metals (Martino et al., 2000; Sharpies et al., 2000; Kaldorf et al., 1999; Heggo and Angle, 1990; Shetty et al., 1994; Diaz et al., 1996).”
Ericoid mycorrhizal fungi: some new perspectives on old acquaintances (2002, background): “It was somewhat surprising to observe that the presence of zinc in the culture medium sharply increased the secretion and activity of extracellular enzymes that hydrolyse polymeric substances such as the pectin component of plant cell walls (Martino et al., 2000a).”
Zinc Phosphate and Pyromorphite Solubilization by Soil Plant-Symbiotic Fungi (2004, background): “…Zn was isolated in 1995 from a plot where zinc was the most abundant metal in the contaminating dust (22.06% ZnO; 0.63% CdO; 8.13% Al2O3); whereas Cd was the most abundant metal in the dust (3.02% CdO; 1.75% ZnO; 21.83% Al2O3) in the plot where O. maius Cd was isolated from (Martino et al. 2000).”