O-Glycosylated Cell Wall Proteins Are Essential in Root Hair Growth.

The article focuses on the role O-glycosylated cell wall proteins play in the growth of root hairs. It states root hairs are single cells that specialize in nutrient absorption and have cell walls composed of polysaccharides and hydroxyproline-rich glycoproteins that include arabinogalactan-proteins and extensins. It mentions that prolyl 4-hydroxylases (P4Hs) catalyze proline hydroxylation which defines the subsequent O-glycosylation sites in extensins and arabinogalactan-proteins. It examines the biological function of arabinosyltransferases, extensins and P4Hs in the growth of root hair cells.