Göttlein, A; Heim, A; Matzner, E: Mobilization of aluminium in the rhizosphere soil solution of growing tree roots in an acidic soil, Plant and Soil, 211, 41-49 (1999)
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.
Upcoming ...

BayCEER Colloquium:
Th. 2019-11-14
Analysis of ozone formation and trend over northern Bavaria by using stochastic and deterministic models
Th. 2019-11-21
Quantification of subsurface properties using the groundwater response to Earth and atmospheric tides
Fr. 2019-11-22
Geoökologie-Tagung 2019
Fr. 2019-11-15
Changing the game in Earth Observation - The European Union’s Copernicus programme -
Universitäts-Forum Bayreuth:
We. 2019-11-13
Bayreuther Innenstadt und Rotmaincenter: Freund oder Feind? - Betrachtungen aus der Perspektive der Besucher
BayCEER Blog
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
EGU – interesting research and free coffee
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 964.4 hPa
Lufttemperatur: 5.1 °C
Niederschlag: 0.4 mm/24h
Sonnenschein: 2 h/d
Wind (Höhe 17m): 8.2 km/h
Wind (Max.): 18.7 km/h
Windrichtung: S

Globalstrahlung: 206 W/m²
Lufttemperatur: 1.7 °C
Niederschlag: 0.4 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 10.7 km/h

This site makes use of cookies More information