The amounts of (1→3, 1→4)-β-d-glucan and the monosaccharides Man, Xyl, and arabinose in the developing barley endosperm (cv Sloop). The endosperms were collected from 5 to 38 DAP in February 2008 (Feb) and September 2008 (Sep) as described in the “Materials and Methods.” Mean of three replicates, error bars are sd. A, (1→3, 1→4)-β-d-glucan. B, Man (Sep only). C, Xyl. D, Arabinose expressed as micrograms per endosperm.