Effects of Ca, Cu, Al and La on pectin gel strength: Implications for plant cell walls

McKenna, Brigid A., Nicholson, Timothy M., Wehr, J. Bernhard and Menzies, Neal W. (2010) Effects of Ca, Cu, Al and La on pectin gel strength: Implications for plant cell walls. Carbohydrate Research, 345 9: 1174-1179. doi:10.1016/j.carres.2010.03.044

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Author McKenna, Brigid A.
Nicholson, Timothy M.
Wehr, J. Bernhard
Menzies, Neal W.
Title Effects of Ca, Cu, Al and La on pectin gel strength: Implications for plant cell walls
Journal name Carbohydrate Research   Check publisher's open access policy
ISSN 0008-6215
Publication date 2010-06-16
Sub-type Article (original research)
DOI 10.1016/j.carres.2010.03.044
Volume 345
Issue 9
Start page 1174
End page 1179
Total pages 6
Editor D. C. Baker
E. F. Hounsell
T. Lowary
S. Oscarson
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2011
Language eng
Formatted abstract
Rheology of Ca-pectate gels is widely studied, but the behaviour of pectate gels formed by Cu, Al and La is largely unknown. It is well known that gel strength increases with increasing Ca concentration, and it is hypothesised that this would also be the case for other cations. Pectins are a critical component of plant cell walls, imparting various physicochemical properties. Furthermore, the mechanism of metal toxicity in plants is hypothesised to be, in the short term, related to metal interactions with cell wall pectin. This study investigated the influence of Ca, Cu, Al and La ion concentrations at pH 4 on the storage modulus as a function of frequency for metal-pectin gels prepared from pectin (1%) with a degree of esterification of 30%. Gels were formed in situ over 6 d in metal chloride solution adjusted daily to pH 4. Cation concentration was varied to develop a relationship between gel strength and cation concentration. At similar levels of cation saturation, gel strength increased in the order of La < Ca ≤ Al ≪ Cu. The swelling of the gels also varied between cations with Ca gels being the most swollen.
© 2010 Elsevier Ltd. All rights reserved.
Keyword Cell wall
Pectate gels
Cation-induced gelation
Metal complexes
In situ gelation
Ion-exchange properties
Egg-box model
Polygalacturonic acid
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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Created: Sun, 18 Jul 2010, 00:08:12 EST