| Changes in pH and organic acids in mucilage of Eriophorum angustifolium roots after exposure to elevated concentrations of toxic elements. | |
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MedLine Citation:
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PMID: 23274805 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The presence of Eriophorum angustifolium in mine tailings of pyrite maintains a neutral pH, despite weathering, thus lowering the release of toxic elements into acid mine drainage water. We investigated if the presence of slightly elevated levels of free toxic elements triggers the plant rhizosphere to change the pH towards neutral by increasing organic acid contents. Plants were treated with a combination of As, Pb, Cu, Cd, and Zn at different concentrations in nutrient medium and in soil in a rhizobox-like system for 48-120 h. The pH and organic acids were detected in the mucilage dissolved from root surface, reflecting the rhizospheric solution. Also the pH of root-cell apoplasm was investigated. Both apoplasmic and mucilage pH increased and the concentrations of organic acids enhanced in the mucilage with slightly elevated levels of toxic elements. When organic acids concentration was high, also the pH was high. Thus, efflux of organic acids from the roots of E. angustifolium may induce rhizosphere basification. |
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Authors:
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M Tariq Javed; Eva Stoltz; Sylvia Lindberg; Maria Greger |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-12-30 |
Journal Detail:
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Title: Environmental science and pollution research international Volume: - ISSN: 1614-7499 ISO Abbreviation: Environ Sci Pollut Res Int Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2012-12-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9441769 Medline TA: Environ Sci Pollut Res Int Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Botany, Stockholm University, 106 91, Stockholm, Sweden, tariq.javed@botan.su.se. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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