Organic acid secretion as a mechanism of aluminium resistance: a model incorporating the root cortex, epidermis, and the external unstirred layer.

@article{Kinraide2005OrganicAS,
  title={Organic acid secretion as a mechanism of aluminium resistance: a model incorporating the root cortex, epidermis, and the external unstirred layer.},
  author={Thomas B. Kinraide and David R. Parker and Richard W. Zobel},
  journal={Journal of experimental botany},
  year={2005},
  volume={56 417},
  pages={1853-65}
}
The resistance of some plants to Al (aluminium or aluminum) has been attributed to the secretion of Al(3+)-binding organic acid (OA) anions from the Al-sensitive root tips. Evidence for the 'OA secretion hypothesis' of resistance is substantial, but the mode of action remains unknown because the OA secretion appears to be too small to reduce adequately the activity of Al(3+) at the root surface. In this study a mechanism for the reduction of Al(3+) at the root surface and just beneath the… CONTINUE READING
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