000848036 001__ 848036 000848036 005__ 20210129233928.0 000848036 0247_ $$2doi$$a10.1104/pp.17.01776 000848036 0247_ $$2ISSN$$a0032-0889 000848036 0247_ $$2ISSN$$a1532-2548 000848036 0247_ $$2pmid$$apmid:29487120 000848036 0247_ $$2WOS$$aWOS:000429089100003 000848036 0247_ $$2altmetric$$aaltmetric:33744120 000848036 037__ $$aFZJ-2018-03326 000848036 041__ $$aeng 000848036 082__ $$a580 000848036 1001_ $$0P:(DE-Juel1)156477$$aVoiniciuc, Cătălin$$b0 000848036 245__ $$aMonitoring Polysaccharide Dynamics in the Plant Cell Wall. 000848036 260__ $$aRockville, Md.$$bSoc.$$c2018 000848036 3367_ $$2DRIVER$$aarticle 000848036 3367_ $$2DataCite$$aOutput Types/Journal article 000848036 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1528803628_23377 000848036 3367_ $$2BibTeX$$aARTICLE 000848036 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000848036 3367_ $$00$$2EndNote$$aJournal Article 000848036 520__ $$aAll plant cells are surrounded by complex walls that play a role in the growth and differentiation of tissues. Walls provide mechanical integrity and structure to each cell and represent an interface with neighboring cells and the environment (Somerville et al., 2004). Cell walls are composed primarily of multiple polysaccharides that can be grouped into three major classes: cellulose, pectins, and hemicelluloses. While cellulose fibrils are synthesized by the plant cells directly at the plasma membrane (PM), the matrix polysaccharides are produced in the Golgi apparatus by membrane-bound enzymes from multiple glycosyltransferase families (Oikawa et al., 2013). After secretion to the wall via exocytosis, the structures of the noncellulosic polysaccharides are modified by various apoplastic enzymes. In addition to polysaccharides, most plant cell walls contain small amounts of structural proteins such as extensins and arabinogalactan proteins.Cell walls are dynamic entities, rather than rigid and recalcitrant shells, that can be remodeled during plant development and in response to abiotic and biotic stresses. Cell expansion requires the deposition of additional material in the surrounding primary walls as well as the reorganization and loosening of existing polymers to allow for wall relaxation and controlled expansion (Cosgrove, 2005). The latest model of the primary wall structure proposes that cellulose-cellulose junctions only occur at a limited number of biomechanical hotspots, where protein catalysts must act selectively to initiate wall loosening (Cosgrove, 2018). In tissues undergoing growth, the recycling of polysaccharides via a suite of enzymes can contribute to the construction of elongating walls (Barnes and Anderson, 2018). Once elongation ceases, some cells deposit thick secondary walls that incorporate additional polysaccharides. 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