. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . ns are first mounted in akohol, and water iscarefully drawn under the cover-glass, the mucilaginous substance is seento be deposited in layers, (jentle warming with alkali removes this sub-stance, and also aids in clearing the remaining layers. 2. Subepidermal Layer {sub). Beneath the ej)idermis are thin walledcells even larger than those of the epidermis, the radial walls of which BLACK MUSTARD. l8l correspond with the reticulations of the seed and the highest cells oft
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . ns are first mounted in akohol, and water iscarefully drawn under the cover-glass, the mucilaginous substance is seento be deposited in layers, (jentle warming with alkali removes this sub-stance, and also aids in clearing the remaining layers. 2. Subepidermal Layer {sub). Beneath the ej)idermis are thin walledcells even larger than those of the epidermis, the radial walls of which BLACK MUSTARD. l8l correspond with the reticulations of the seed and the highest cells ofthe next layer. 3. Palisade Cells {pal). Cross sections show that the brown pali-sade or beaker cells are of unequal height, causing the reticulated ap-pearance of the seed and the con-spicuous, dark meshes seen insurface view (Fig. 145a, pal~).Sometimes the outer thin-walledportion of the palisade layerbreaks away from the remainderof the spermoderm, as shown inFig. 145a, pal^. In surface view,the cells are isodiametric, 4-10 n,in diameter, or elongated, reach-ing a maximum length of 20 //. 4. Pigment Cells {pig). One,. Fig. 145. Black Mustard (Brassica nigra).Seed in cross section. S spermoderm con-sists of ep epidermis, sub subepidermal layer,pal palisade cells, and pig pigment cells; Eendosperm; C cotyledon with aep outerepidermis and al aleurone cells. X160. (K. B. WiNTON.) sometimes two, layers of cells with brown contents form the inner coatof the spermoderm. In surface \iew the cells are either isodiametric orsomewhat elongated, often reaching a length of 75 ft. Ferric chloride
Size: 2261px × 1105px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
