Molecular and Cellular Biochemistry

, Volume 231, Issue 1, pp 179–185

Influence of zinc ions on protein secretion in a heavy metal tolerant strain of the ericoid mycorrhizal fungas Oidiodendron maius

  • Elena Martino
  • Barbara Franco
  • Giovanni Piccoli
  • Vilberto Stocchi
  • Silvia Perotto
Article

DOI: 10.1023/A:1014485420186

Cite this article as:
Martino, E., Franco, B., Piccoli, G. et al. Mol Cell Biochem (2002) 231: 179. doi:10.1023/A:1014485420186

Abstract

A heavy metal tolerant strain of the ericoid mycorrhizal species Oidiodendron maius, isolated from soil heavily contaminated with zinc, was previously shown to tolerate high concentrations of zinc and cadmium ions in the growth medium. We have investigated some of the specific molecular responses of this fungal strain to the presence of increasing concentrations of zinc ions in the growth medium. In particular, we show that zinc ions induce a general change in the array of secreted proteins, with a shift towards the production of more basic, low molecular weight polypeptides. Some of these proteins were microsequenced and identified through homology search in databases. Among them are hydrolytic enzymes (nuclease, proteinase, lysozyme) and two superoxide dismutase isoforms. The latter are antioxidant enzymes known to play a role in heavy metal response in plants, animals and microorganisms.

heavy metalericoid mycorrhizaprotein secretionoxidative stress

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Elena Martino
  • Barbara Franco
  • Giovanni Piccoli
  • Vilberto Stocchi
  • Silvia Perotto

There are no affiliations available