Morphology of the barley grain with reference to its enzym-secreting areas . Fig. 1 .—Longitudinal (Dorsi-ventral) Section of a MatureBarley Grain. a, Starch endosperm; b, aleurone layer; c, area of starch endo-sperm, adjacent to the scutellnm, representing the initialstage of the corrosion of the endosperm. This took place atthe close of the ripening of the grain, d-r, The embryo; d,plumule with investing sheath; c, primary, and e, secondary,radicles;/, scutellum, the surface next to the endosperm covered?with the epithelial layer (g); r, root cap of primary Fig. 2.—Longitudinal Sec
Morphology of the barley grain with reference to its enzym-secreting areas . Fig. 1 .—Longitudinal (Dorsi-ventral) Section of a MatureBarley Grain. a, Starch endosperm; b, aleurone layer; c, area of starch endo-sperm, adjacent to the scutellnm, representing the initialstage of the corrosion of the endosperm. This took place atthe close of the ripening of the grain, d-r, The embryo; d,plumule with investing sheath; c, primary, and e, secondary,radicles;/, scutellum, the surface next to the endosperm covered?with the epithelial layer (g); r, root cap of primary Fig. 2.—Longitudinal Section of Barley Grain, Showingthe Stage of Endosperm Conversion at the End ofthe Second Day of Germination. Thestarch endosperm is being broken down in thedenseareas directlyin front of the epitheliallayer, (e), of the scutellum (s), and morerapidly in the less dense areas adjacent to the aleurone layer, (a).b, Clear fluid area produced during germination; c, corroded area ofstarch endosperm; n, normal starch endosperm not yet attacked. MORPlTOLOfiY OF THE BARLEY GRAIN. 5 DEVELOPMENT OF THE BARLEY GRAIN. An understanding of the office and behavior of the various organsof the barley grain is greatly facilitated by observations upon theirorigin and development. Some of these organs are functionalthroughout the existence of the seed; others important in the earlyStages afterwards disappear, while still others become so modifiedas to be serviceable in a totally different way. The flower of the barley plant is inclosed within the floweringglumes, as in all grasses.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1915
