Plant and Soil

, Volume 352, Issue 1, pp 267–276

A comparison of lead accumulation and tolerance among heavy metal hyperaccumulating and non-hyperaccumulating metallophytes

  • Ahmad Mohtadi
  • Seyed Majid Ghaderian
  • Henk Schat
Regular Article

DOI: 10.1007/s11104-011-0994-5

Cite this article as:
Mohtadi, A., Ghaderian, S.M. & Schat, H. Plant Soil (2012) 352: 267. doi:10.1007/s11104-011-0994-5

Abstract

Aims

The aim of the present study was to compare lead accumulation and tolerance among heavy metal hyperaccumulating and non-hyperaccumulating metallophytes.

Methods

To this purpose, we compared Pb tolerance and accumulation in hydroponics among calamine and non-calamine populations of Silene vulgaris, Noccaea caerulescens, and Matthiola flavida. We established the effects of Ca on Pb tolerance and accumulation in M. flavida, and measured exchangeable soil Pb and Ca at two calamine sites.

Results

Results revealed that calamine populations of S. vulgaris and N. caerulescens were Pb hypertolerant, but the calamine M. flavida population was not. Pb hyperaccumulation capacity was exclusively found in one of the calamine N. caerulescens populations.

Conclusions

1) Pb hypertolerance is sometimes lacking in metallophyte populations from strongly Pb-enriched soil, probably due to a relatively high level of exchangeable soil Ca, 2) Ca effectively counteracts Pb uptake and Pb toxicity, 3) The tendency to hyperaccumulate Pb is a population-specific phenomenon in N. caerulescens, 4) Pb hypertolerance in N. caerulescens is not necessarily associated with a tendency to hyperaccumulate Pb, 5) apparent natural Pb hyperaccumulation in M. flavida is not reproducible in hydroponics, probably due to the absence of air-born contamination in laboratory experiments.

Keywords

Hyperaccumulation Tolerance Lead Metallophytes Calamine soils Multiple tolerance 

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Ahmad Mohtadi
    • 1
    • 2
  • Seyed Majid Ghaderian
    • 1
  • Henk Schat
    • 2
  1. 1.Department of BiologyUniversity of IsfahanIsfahanIran
  2. 2.Department of Genetics, Faculty of Earth and Life SciencesVrije Universiteit AmsterdamAmsterdamThe Netherlands

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