THE PERMEABILITY OF THE SURFACE LAYERS OF CEREAL GRAINS, AND IMPLICATIONS FOR TESTS OF ABRASION IN BARLEY

摘要: The husk of barley, and the pericarps naked, husked ‘stripped’ barleys, wheat rye are more or less permeable to aqueous solutions salts, Eosin. stripped barley grains conduct so that, for example, they Eosin, [14C]-gibberellic acid from apex base grain where it accumulates in embryo region. On other hand pericarp not readily permeated by Trypan Blue. testa/nucellar cuticle, together with pigment strand, limits inward penetration salts dyes. Gibberellic acid, apparently water also, traversed testae some, but all, decorticated grains, as demonstrated consequent modification starchy endosperms. However most instances gibberellic solution does traverse surface layers induce their