Plant and Soil

, Volume 190, Issue 2, pp 203–209 | Cite as

Influence of silicon pretreatment on aluminium toxicity in maize roots

  • Isabel Corrales
  • Charlotte Poschenrieder
  • Juan Barceló
Article

Abstract

The influence of Si pretreatment on Al toxicity in an Al sensitive maize variety (Zea mays L. var. BR 201 F) was investigated using root elongation rates (RER) and hematoxylin staining as stress indicators. Plants pretreated with 1 mt M Si (+ Si) and then exposed for 24 h to Al in nutrient solution without concurrent Si supply in the rooting medium exhibited higher RER than plants that were not pretreated with Si (-Si). The ameliorative effect of Si was due to lower Al uptake and to the exclusion of Al from the root tips in + Si plants. Lower Al uptake in + Si plants was not a consequence of decreased Al availability in the bulk solution. The possible mechanisms of Si-induced increase of Al resistance are discussed

aluminium toxicity hematoxylin staining root elongation silicon t Zea mays L 

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Isabel Corrales
    • 1
  • Charlotte Poschenrieder
    • 1
  • Juan Barceló
    • 1
  1. 1.Plant Physiology Laboratory, Science FacultyAutonomous University of BarcelonaBallaterraSpain

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