Hydrolysis and speciation of Al bound to pectin and plant cell wall material and its reaction with the dye chrome azurol S

Wehr, J. Bernhard, Blamey, F. P. C., Hanna, J. V., Kopittke, P. M, Kerven, G. L. and Menzies, N. W. (2010) Hydrolysis and speciation of Al bound to pectin and plant cell wall material and its reaction with the dye chrome azurol S. Journal of Agricultural and Food Chemistry, 58 9: 5553-5560. doi:10.1021/jf100201x


Author Wehr, J. Bernhard
Blamey, F. P. C.
Hanna, J. V.
Kopittke, P. M
Kerven, G. L.
Menzies, N. W.
Title Hydrolysis and speciation of Al bound to pectin and plant cell wall material and its reaction with the dye chrome azurol S
Journal name Journal of Agricultural and Food Chemistry   Check publisher's open access policy
ISSN 0021-8561
1520-5118
Publication date 2010-05
Sub-type Article (original research)
DOI 10.1021/jf100201x
Volume 58
Issue 9
Start page 5553
End page 5560
Total pages 8
Place of publication Washington DC, United States
Publisher American Chemical Society
Collection year 2011
Language eng
Subject C1
0701 Agriculture, Land and Farm Management
Formatted abstract
Hydrolysis of aluminum (Al) in solution increases at pH ≥ 4 and with an Al concentration. Pectin, an important anionic polysaccharide of plant cell walls, adsorbs Al, but this phenomenon is poorly understood. This study showed that Al3+ hydrolysis results in binding of Al to pectin in excess of the stoichiometric equivalent, leading to oversaturation of the pectin with Al. However, the degree of pectin methyl-esterification did not affect the extent of Al hydrolysis. Binding of Al to purified cell wall material also resulted in Al hydrolysis in a pH-and soluble Al concentration-dependent manner, but the source of cell wall material had no effect at fixed pH. Staining of Al-treated pectin and cell wall material from wheat (Triticum aestivum L.) and sunflower (Helianthus annuus L.) with the Al-specific dye, chrome azurol S (CAS), resulted in the formation of a purple color, with the intensity related to the extent of Al hydrolysis.
© 2010 American Chemical Society.
Keyword Pectin
Cell Walls
Aluminum
Adsorption
Speciation
Hydrolysis
Helianthus annuus
Triticum aestivum
Vigna unguiculata
X-ray-scattering
Tridecameric polycation
Aluminum speciation
Al-27 Nmr
Spectrophotometric Determination
Forest soils
Complexes
Ph
Al-13
Polymerization
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Agriculture and Food Sciences
 
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Created: Sun, 16 May 2010, 00:04:36 EST