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The role of the root apoplast in aluminium-induced inhibition of root elongation and in aluminium resistance of plants: a review

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Horst, Walter J., Wang, Yunxia, Eticha, Dejene·2010·Annals of Botany

Abstract

BACKGROUND: Aluminium (Al) toxicity is the most important soil constraint for plant growth and development in acid soils. The mechanism of Al-induced inhibition of root elongation is still not well understood, and it is a matter of debate whether the primary lesions of Al toxicity are apoplastic or symplastic. SCOPE: The present review focuses on the role of the apoplast in Al toxicity and resistance, summarizing evidence from our own experimental work and other evidence published since 1995. CONCLUSIONS: The binding of Al in the cell wall particularly to the pectic matrix and to the apoplastic face of the plasma membrane in the most Al-sensitive root zone of the root apex thus impairing apoplastic and symplastic cell functions is a major factor leading to Al-induced inhibition of root elongation. Although symplastic lesions of Al toxicity cannot be excluded, the protection of the root apoplast appears to be a prerequisite for Al resistance in both Al-tolerant and Al-accumulating plant species. In many plant species the release of organic acid anions complexing Al, thus protecting the root apoplast from Al binding, is a most important Al resistance mechanism. However, there is increasing physiological, biochemical and, most recently also, molecular evidence showing that the modification of the binding properties of the root apoplast contributes to Al resistance. A further in-depth characterization of the Al-induced apoplastic reaction in the most Al-sensitive zone of the root apex is urgently required, particularly to understand the Al resistance of the most Al-resistant plant species.

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Metadata

Authors
Horst, W. J., Wang, Y., & Eticha, D.
Venue
Annals of Botany
Published
2010-03-17
Volume
106
Issue
1
Pages
185-197
ISSN
  • 0305-7364 (ISSN-L)
  • 1095-8290
OpenAlex
W2119032978
Cited by
512
References
98
FWCI
26.56
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The role of the root apoplast in aluminium-induced inhibition of root elongation and in aluminium resistance of plants: a review. https://app.cochat.ai/papers/10.1093/aob/mcq053
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Horst, W. J., Wang, Y., & Eticha, D. (2010). The role of the root apoplast in aluminium-induced inhibition of root elongation and in aluminium resistance of plants: a review. Annals of Botany. https://doi.org/10.1093/aob/mcq053

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