Plant and Soil

, Volume 251, Issue 1, pp 55–63

Different mechanisms account for enhanced copper resistance in Silene armeria ecotypes from mine spoil and serpentine sites

  • Mercè Llugany
  • Alessandra Lombini
  • Charlotte Poschenrieder
  • Enrico Dinelli
  • Juan Barceló
Article

DOI: 10.1023/A:1022990525632

Cite this article as:
Llugany, M., Lombini, A., Poschenrieder, C. et al. Plant and Soil (2003) 251: 55. doi:10.1023/A:1022990525632

Abstract

The resistance to excess Cu was evaluated in solution culture in three ecotypes of Silene armeria from different origin, a garden soil (Cadriano), a serpentine site (Prinzera) and a Cu mine spoil (Vigonzano). Root elongation and viability staining of root tip cells were used as indicators for Cu resistance. The Cu resistance increased in the order Cadriano <Prinzera<Vigonzano. Renewal of the root cap in Prinzera and enhanced border cell production in Vigonzano in response to excess Cu provided a more efficient protection of the root tip meristem than in Cu sensitive Cadriano. The enhanced Cu resistance in Prinzeracould not be attributed to high soil Cu acting as a natural selection factor at the serpentine site. In PrinzeraCu exclusion from roots and shoots probably was a consequence of root impermeabilization causing reduced radial water and ion flux in roots. In contrast, the high Cu resistance in the mine spoil ecotype, Vigonzano, was due to both reduced Cu uptake and higher tissue tolerance of Cu.

Cell viabilitycopper toxicitycopper resistanceserpentineSilene armeriaxylem sap

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Mercè Llugany
    • 1
  • Alessandra Lombini
    • 1
  • Charlotte Poschenrieder
    • 1
  • Enrico Dinelli
    • 2
  • Juan Barceló
    • 1
  1. 1.Laboratorio Fisiología Vegetal, Facultad de CienciasUniversidad Autónoma de BarcelonaBellaterraSpain
  2. 2.Dipartamento de Scienze della Terra e Geologico-AmbientaliUniversità di BolognaBolognaItaly