Histopathology of Seed-Borne Infections - Applied Research Center ...

72 Histopathology of Seed-Borne InfectionsgrendperpercucrtchendfendperalsctcolpsamesralcolrembsctABCtcaltccrhpalemDglEscFaltcperscGHIFIGURE 3.13 Structure of caryopsis in Poaceae. A, B, Ls of caryopsis and part of pericarprespectively in Triticum. Note differentiation of pericarp and structure of cross cells and tubecells. C, Ls caryopsis of Zea mays. D to G, Oryza sativa. D, Caryopsis covered with glumes(lemma with awn and palea). E, Macerated part of husk showing longitudinal rows ofepidermal cells, mesophyll cells, and hair. F, Surface view of part of pericarp showing tubecells and cross cells. G, Tube cells and cells of pigmented testa. H, I, Eleusine indica. H, Lspart of pericarp. Note thinwalled cells, which form thin, loose, papery membrane around theseed. I, Ls part of seed coat, aleurone layer, and endosperm. Seed coat formed by both thelayers of inner integument, outer thick-walled, and inner with pigmented contents. (Abbreviations:al, aleurone layer; colp, coleoptile; colr, coleorhiza; cr, cross cells; cu, cuticle; emb,embryo; end, endosperm; fend, floury endosperm; gl, glume; gr, groove; h, hair; hend, hornyendosperm; lem, lemma; mes, mesocotyl; pa, palea; per, pericarp; r, radicle; sa, shoot apex;sc, seed coat; sct, scutellum; tc, tubular cells.) (A, B, From Esau, K. 1974. Anatomy of SeedPlants. Wiley Eastern, New Delhi. With permission; C to G, Redrawn from Vaughan, J.A.1970. The Structure and Utilization of Oil Seeds. Chapman & Hall, London; H, I, FromChandra, N. 1963. Proc. Indian Acad. Sci. 58: 117–127.)