This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1007/s11104-009-0190-z in citations.
Please use the identifier: http://hdl.handle.net/2128/4398 in citations.
Rhizosphere pH dynamics in trace-metal-contaminated soils, monitored with planar ph optodes
Rhizosphere pH dynamics in trace-metal-contaminated soils, monitored with planar ph optodes
The present study presents new insights into pH dynamics in the rhizosphere of alpine pennycress (Noccaea caerulescens (J. Presl & C. Presl) F.K. Mey), maize (Zea mays L.) and ryegrass (Lolium perenne L.), when growing on three soils contaminated by trace metals with initial pH values varying fr...
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Personal Name(s): | Blossfeld, S. |
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Perriguey, J. / Sterckeman, T. / Morel, J.-L. / Lösch, R. | |
Contributing Institute: |
Phytosphäre; ICG-3 |
Published in: | Plant and soil, 330 (2010) |
Published in: |
Plant and Soil Volume 330, Numbers 1-2, 173-184 |
Imprint: |
Dordrecht [u.a.]
Springer Science + Business Media B.V
2010
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DOI: |
10.1007/s11104-009-0190-z |
Document Type: |
Journal Article |
Research Program: |
Terrestrische Umwelt |
Series Title: |
Plant and Soil
330 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/4398 in citations.
The present study presents new insights into pH dynamics in the rhizosphere of alpine pennycress (Noccaea caerulescens (J. Presl & C. Presl) F.K. Mey), maize (Zea mays L.) and ryegrass (Lolium perenne L.), when growing on three soils contaminated by trace metals with initial pH values varying from 5.6 to 7.4. The pH dynamics were recorded, using a recently developed 2D imaging technique based on planar pH optodes. This showed that alpine pennycress and ryegrass alkalinized their rhizosphere by up to 1.7 and 1.5 pH units, respectively, whereas maize acidified its rhizosphere by up to -0.7 pH units. The alkalinization by the roots of alpine pennycress and ryegrass was permanent and not restricted to specific root zones, whereas the acidification along the maize roots was restricted to the elongation zone and thus only temporary. Calculations showed that such pH changes should have noticeable effects on the solubility of the trace metal in the rhizosphere, and therefore on their uptake by the plants. As a result, it is suggested that models for trace metal uptake should include precise knowledge of rhizospheric pH conditions. |