Rehmus, A.; Bigalke, M.; Valarezo, C.; Mora Castillo, J.R. & Wilcke, W. (2015): <b>Aluminium toxicity to tropical montane forest tree seedlings in southern Ecuador: Response of the nutrient status to elevated Al concentrations</b>. <i>Plant and Soil</i> <b>388</b>, 87-97.
Resource Description
Title:
Aluminium toxicity to tropical montane forest tree seedlings in southern Ecuador: Response of the nutrient status to elevated Al concentrations
FOR816dw ID:
1321
Publication Date:
2015-01-01
License and Usage Rights:
PAK 823-825 data user agreement. (www.tropicalmountainforest.org/dataagreementp3.do)
email:
wolfgang.wilcke <at> kit.edu
Karlsruhe Institute of Technology
Institute of Geography and Geoecology
Reinhard-Baumeister-Platz 1
76131 Karlsruhe
Baden-Württemberg
Germany
Abstract:
Aims We determined the reasons why in nutrient solution increasing Al concentrations>300 ?M inhibited<br/>
shoot biomass production of Cedrela odorata L., Heliocarpus americanus L., and Tabebuia chrysantha<br/>
(Jacq.) G. Nicholson while 300 ?M Al stimulated root biomass production of Tabebuia chrysantha.<br/>
Methods Nutrient concentrations in plant tissue after a hydroponic growth experiment were determined.<br/>
Results Increasing Al concentrations significantly decreased Mg concentrations in leaves. Phosphorus<br/>
concentrations in roots of C. odorata and T. chrysantha were significantly highest in the treatment with 300 ?M Al and correlated significantly with root biomass.<br/>
Conclusions Shoot biomass production was likely inhibited by reduced Mg uptake, impairing photosynthesis.<br/>
The stimulation of root growth at low Al concentrations can be possibly attributed to improved P uptake.
email:
wolfgang.wilcke <at> kit.edu
Karlsruhe Institute of Technology
Institute of Geography and Geoecology
Reinhard-Baumeister-Platz 1
76131 Karlsruhe
Baden-Württemberg
Germany
