Fig. 1.
(A) Longitudinal sections of the different phases of Brachypodium distachyon germination sensu stricto, stained with toluidine blue. C, coleorhiza; Co, coleoptile; E, endosperm; Sc, scutellum; Sh, shoot; R, root. Scale bar, 200 μm. (B) Endo-β-mannanase activity (white bars) in embryo and endosperm (de-embryonated seed) upon B. distachyon seed germination (0–24h). One unit of MAN activity is defined as the amount of enzyme that releases 1 nmol of reducing sugar per minute and per mg of protein. Percentage germination evaluated as coleorhiza emergence (CE; open circles) and root emergence (RE; close circles) are represented. In the inset, the time needed for 50% of CE (t50CE) and RE (t50RE) is indicated. Data are means ± standard error (SE) of three technical replicates of three biological samples.