(1) Scutellum covered with yellow pubescence.

(2) Since the reaction of ABA on scutellum is not sensitive and higher level of ABA can inhibit the plumule and radicle, so that it promotes the scutellum callus growth.

(3) The store in different parts of scutellum had different degradation rates. The rate was faster in the epithelial cells than that of the inner cells.

(4) Miniature mutants appeared in the generations of the regenerated plants were obtained in the scutellum cell of the sorghum pure Line 401-1 through immature embryo culture.

(5) The mature embryo is corn posed of radicle, coleorhiza , plumule, coleoptile, scutellum and epiblast. That is the typical structure of the mature embryo of grass.