Plant and Soil

, Volume 388, Issue 1, pp 87–97

Aluminum toxicity to tropical montane forest tree seedlings in southern Ecuador:

Response of nutrient status to elevated Al concentrations
  • Agnes Rehmus
  • Moritz Bigalke
  • Carlos Valarezo
  • Julio Mora Castillo
  • Wolfgang Wilcke
Regular Article

DOI: 10.1007/s11104-014-2276-5

Cite this article as:
Rehmus, A., Bigalke, M., Valarezo, C. et al. Plant Soil (2015) 388: 87. doi:10.1007/s11104-014-2276-5

Abstract

Aims

We determined the reasons why in nutrient solution increasing Al concentrations >300 μM inhibited shoot biomass production of Cedrela odorata L., Heliocarpus americanus L., and Tabebuia chrysantha (Jacq.) G. Nicholson while 300 μM Al stimulated root biomass production of Tabebuia chrysantha.

Methods

Nutrient concentrations in plant tissue after a hydroponic growth experiment were determined.

Results

Increasing Al concentrations significantly decreased Mg concentrations in leaves. Phosphorus concentrations in roots of C. odorata and T. chrysantha were significantly highest in the treatment with 300 μM Al and correlated significantly with root biomass.

Conclusions

Shoot biomass production was likely inhibited by reduced Mg uptake, impairing photosynthesis. The stimulation of root growth at low Al concentrations can be possibly attributed to improved P uptake.

Keywords

Aluminum toxicity Tropical forest tree seedlings Nutrient deficiency Growth stimulation by phosphorus 

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Agnes Rehmus
    • 1
  • Moritz Bigalke
    • 1
  • Carlos Valarezo
    • 2
  • Julio Mora Castillo
    • 3
  • Wolfgang Wilcke
    • 4
  1. 1.Geographic InstituteUniversity of BernBernSwitzerland
  2. 2.Dirección General de InvestigacionesUniversidad Nacional de Loja, Ciudadela Universitaria Guillermo Falconí, sector La ArgeliaLojaEcuador
  3. 3.Institute of SilvicultureTechnische Universität MünchenFreisingGermany
  4. 4.Institute of Geography and GeoecologyKarlsruhe Institute of Technology (KIT)KarlsruheGermany