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Int. J. Mol. Sci. 2015, 16(2), 3452-3473; doi:10.3390/ijms16023452

Starting to Gel: How Arabidopsis Seed Coat Epidermal Cells Produce Specialized Secondary Cell Walls

1
Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, 52425 Jülich, Germany
2
Institute for Botany and Molecular Genetics (IBMG), RWTH Aachen University, 52056 Aachen, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Marcello Iriti
Received: 11 December 2014 / Revised: 22 January 2015 / Accepted: 29 January 2015 / Published: 4 February 2015
(This article belongs to the Special Issue Plant Molecular Biology)
View Full-Text   |   Download PDF [2102 KB, uploaded 4 February 2015]   |  

Abstract

For more than a decade, the Arabidopsis seed coat epidermis (SCE) has been used as a model system to study the synthesis, secretion and modification of cell wall polysaccharides, particularly pectin. Our detailed re-evaluation of available biochemical data highlights that Arabidopsis seed mucilage is more than just pectin. Typical secondary wall polymers such as xylans and heteromannans are also present in mucilage. Despite their low abundance, these components appear to play essential roles in controlling mucilage properties, and should be further investigated. We also provide a comprehensive community resource by re-assessing the mucilage phenotypes of almost 20 mutants using the same conditions. We conduct an in-depth functional evaluation of all the SCE genes described in the literature and propose a revised model for mucilage production. Further investigation of SCE cells will improve our understanding of plant cell walls. View Full-Text
Keywords: arabidopsis; seed coat epidermis; cell wall biosynthesis; mucilage; pectin; hemicellulose; cellulose; glycosyltransferase; glycosyl hydrolase; transcription factor arabidopsis; seed coat epidermis; cell wall biosynthesis; mucilage; pectin; hemicellulose; cellulose; glycosyltransferase; glycosyl hydrolase; transcription factor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Voiniciuc, C.; Yang, B.; Schmidt, M.H.-W.; Günl, M.; Usadel, B. Starting to Gel: How Arabidopsis Seed Coat Epidermal Cells Produce Specialized Secondary Cell Walls. Int. J. Mol. Sci. 2015, 16, 3452-3473.

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