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Mobilization of aluminium in the rhizosphere soil solution of growing tree roots in an acidic soil

Title data

Göttlein, Axel ; Heim, Alexander ; Matzner, Egbert:
Mobilization of aluminium in the rhizosphere soil solution of growing tree roots in an acidic soil.
In: Plant and Soil. Vol. 211 (1999) Issue 1 . - pp. 41-49.
ISSN 1573-5036
DOI: https://doi.org/10.1023/A:1004332916188

Abstract in another language

Chemical conditions in the rhizosphere in many respects are different from the bulk soil. Especially in acid forest soils aluminium chemistry at the soil root interface is of particular interest because of its importance for evaluating the risk of rhizotoxicity. In the present study we have used micro suction cups to collect soil solution from the rhizosphere of oak seedlings (Quercus robur L.) in high spatial resolution and capillary electrophoresis for the determination of major ions and Al3+. While the concentrations of nutrient cations, especially Ca2+ and Mg2+, decreased in the vicinity of growing roots the concentrations of Al3+ significantly increased. Al3+-ions were probably released when root-exuded protons were buffered by the soil. Their occurrence indicates, that the oak roots in our experiments had only limited capabilities to detoxify Al in their rhizosphere. The restriction of this effect to the very small soil compartment close to the roots suggests, that common soil analysis which neglect rhizosphere processes might greatly underestimate the in situ concentration of Al3+ near tree roots. Our experiments furthermore indicate, that also suberized roots have a significant influence on rhizosphere soil solution chemistry.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER7339
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Soil Ecology - Univ.-Prof. Dr. Egbert Matzner
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 13 Aug 2015 06:12
Last Modified: 13 Aug 2015 06:12
URI: https://eref.uni-bayreuth.de/id/eprint/18062