1. Growth of Lygeum spartum in acid mine tailings: response of plants developed from seedlings, rhizomes and at field conditions
- Author
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Conesa, Héctor M., Robinson, Brett H., Schulin, Rainer, and Nowack, Bernd
- Subjects
ACID mine drainage ,PHYTOREMEDIATION ,HEAVY metals ,PLANT cells & tissues ,PLANT growth-promoting rhizobacteria ,HYDROGEN-ion concentration ,SALTS ,PLANT physiology - Abstract
Lygeum spartum is a native species in semiarid Mediterranean areas that grows spontaneously on acid mine tailings. We aimed to study the suitability of this plant for phytostabilization. L. Spartum was grown from both seeds and rhizomes in acid mine tailings with various fertilizer and lime treatments. Untreated soils had a solution pH of 2. 9 with high concentrations of dissolved salts (Electrical Conductivity 25dSm
−1 ) and Zn (3100mgL−1 ). Plants grown on untreated soil had high shoot metal concentrations (>4000mgkg−1 Zn). Liming increased the solution pH to 5. 5 and reduced the dissolved salts by more than 75%, resulting in lower shoot metal accumulation. Plants grown from rhizomes accumulated less metal than those grown from seeds. Plants collected in the field had metal concentrations an order of magnitude less than plants raised in the growth chamber. These differences may be due to the higher moisture content and homogeneous nature of the soils used in the pot experiment. [Copyright &y& Elsevier]- Published
- 2007
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