Multi-layer mucilage of Plantago ovata seeds: rheological differencesarise from variations in arabinoxylan side chains

Yu, Long, Yakubov, Gleb E, Zeng, Wei, Xing, Xiaohui, Stenson, John, Bulone, Vincent and Stokes, Jason R. (2017) Multi-layer mucilage of Plantago ovata seeds: rheological differencesarise from variations in arabinoxylan side chains. Carbohydrate Polymers, 165 132-141. doi:10.1016/j.carbpol.2017.02.038

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Author Yu, Long
Yakubov, Gleb E
Zeng, Wei
Xing, Xiaohui
Stenson, John
Bulone, Vincent
Stokes, Jason R.
Title Multi-layer mucilage of Plantago ovata seeds: rheological differencesarise from variations in arabinoxylan side chains
Formatted title
Multi-layer mucilage of Plantago ovata seeds: rheological differencesarise from variations in arabinoxylan side chains
Journal name Carbohydrate Polymers   Check publisher's open access policy
ISSN 0144-8617
1879-1344
Publication date 2017-06-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.carbpol.2017.02.038
Open Access Status File (Author Post-print)
Volume 165
Start page 132
End page 141
Total pages 10
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Abstract Mucilages are hydrocolloid solutions produced by plants for a variety of functions, including the creation of a water-holding barrier around seeds. Here we report our discovery of the formation of three distinct mucilage layers around Plantago ovata seeds upon their hydration. Each layer is dominated by different arabinoxylans (AXs). These AXs are unusual because they are highly branched and contain 1,3-linked xylose in their side chains. We show that these AXs have similar monosaccharide and linkage composition, but vary in their polymer conformation. They also exhibit distinct rheological properties in aqueous solution, despite analytical techniques including NMR showing little difference between them. Using enzymatic hydrolysis and chaotropic solvents, we reveal that hydrogen bonding and side chain distribution are key factors underpinning the distinct rheological properties of these complex AXs. (C) 2017 Elsevier Ltd. All rights reserved.
Formatted abstract
Mucilages are hydrocolloid solutions produced by plants for a variety of functions, including the creation of a water-holding barrier around seeds. Here we report our discovery of the formation of three distinct mucilage layers around Plantago ovata seeds upon their hydration. Each layer is dominated by different arabinoxylans (AXs). These AXs are unusual because they are highly branched and contain β-1,3-linked xylose in their side chains. We show that these AXs have similar monosaccharide and linkage composition, but vary in their polymer conformation. They also exhibit distinct rheological properties in aqueous solution, despite analytical techniques including NMR showing little difference between them. Using enzymatic hydrolysis and chaotropic solvents, we reveal that hydrogen bonding and side chain distribution are key factors underpinning the distinct rheological properties of these complex AXs.
Keyword Arabinoxylan
Seed mucilage
Plantago ovata
Rheological behaviour
Polymer Structure
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP150104147
CE110001007
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: HERDC Pre-Audit
 
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Created: Thu, 02 Mar 2017, 21:50:13 EST by Gleb Yakubov on behalf of School of Chemical Engineering