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This article in JEQ

  1. Vol. 33 No. 5, p. 1779-1785
     
    Received: Nov 19, 2003
    Published: Sept, 2004


    * Corresponding author(s): yaodong.wang@botan.su.se
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doi:10.2134/jeq2004.1779

Clonal Differences in Mercury Tolerance, Accumulation, and Distribution in Willow

  1. Yaodong Wang * and
  2. Maria Greger
  1. Department of Botany, Stockholm University, SE-106 91 Stockholm, Sweden

Abstract

This study was performed to investigate mercury (Hg) tolerance, accumulation, and translocation within the genus Salix for the potential use of this plant to remediate Hg-contaminated sites. Six clones of willow (Salix spp.) were tested on tolerance to Hg by treating plants grown in solution culture with 0 to 15 μM HgCl2 Results showed that willow had a large variation in its sensitivity to Hg. However, the accumulation and translocation of Hg to shoots was similar in the eight tested willow clones as shown by cold vapor atomic absorption spectrometry analysis when plants were treated with 0.5 μM HgCl2 in a nutrient solution. The majority of total Hg accumulated was localized to the roots, whereas only 0.45 to 0.62% of the total Hg accumulated via roots was translocated to the shoots. Thus, the root system is the main tissue of willow that accumulates Hg and the majority of the Hg in the root system (80%) was bound in the cell wall.

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