title: Starting to gel: how Arabidopsis seed coat epidermal cells produce specialized secondary cell walls.
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.
authors: Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, 52425 Jülich, Germany. boyang8635@gmail.com.|Institute for Botany and Molecular Genetics (IBMG), RWTH Aachen University, 52056 Aachen, Germany. boyang8635@gmail.com.
authors: Cătălin
authors: C
authors: Voiniciuc
authors: Institute for Botany and Molecular Genetics (IBMG), RWTH Aachen University, 52056 Aachen, Germany. boyang8635@gmail.com.
authors: Bo
authors: B
authors: Yang
authors: Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, 52425 Jülich, Germany. boyang8635@gmail.com.|Institute for Botany and Molecular Genetics (IBMG), RWTH Aachen University, 52056 Aachen, Germany. boyang8635@gmail.com.
authors: Maximilian Heinrich-Wilhelm
authors: MH
authors: Schmidt
authors: Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, 52425 Jülich, Germany. m.guenl@fz-juelich.de.
authors: Markus
authors: M
authors: Günl
authors: Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, 52425 Jülich, Germany. usadel@bio1.rwth-aachen.de.|Institute for Botany and Molecular Genetics (IBMG), RWTH Aachen University, 52056 Aachen, Germany. usadel@bio1.rwth-aachen.de.
authors: Björn
authors: B
authors: Usadel
mesh_terms: D017360:Arabidopsis / Q000166:cytology* / Q000196:embryology / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics; D002473:Cell Wall / Q000378:metabolism*; D008954:Models, Biological; D009154:Mutation; D010368:Pectins / Q000378:metabolism*; D012639:Seeds / Q000166:cytology / Q000378:metabolism*; D014990:Xylans / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D014990:Xylans; D010368:Pectins