. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . e in all the common reagents, including boiling alkali. Insurface view the markings, resembling those of a tortoise shell, which arcdue to the variable thickness of the pigment material, and the rows of MADIA SEED. 199 minute pores appearing as light spots in the dark field, make this layerthe most striking in the fruit. 4. Fiber Bundles (/). The fibers are 5-15 [x in diameter and oftenare i mm. long, being smallest in the outer layers. Between the bundlesare groups of t
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . e in all the common reagents, including boiling alkali. Insurface view the markings, resembling those of a tortoise shell, which arcdue to the variable thickness of the pigment material, and the rows of MADIA SEED. 199 minute pores appearing as light spots in the dark field, make this layerthe most striking in the fruit. 4. Fiber Bundles (/). The fibers are 5-15 [x in diameter and oftenare i mm. long, being smallest in the outer layers. Between the bundlesare groups of thin-walled, more or less longitudinally elongated cells,forming wedge-shaped partitions (w). 5. Parenchyma (p). Several rows of partially collapsed parenchymacells form the inner layers of the pericarp. The Spermoderm (Figs. 155 and 156,5) consists of one distinct layerof parenchyma cells without any striking characters, and other less dis-tinct layers near the raphe bundles. Curiously shaped, pitted cells (Fig. 156, sc), some nearly isodiametric,others greatly elongated, are present at the base of the seed, the longer. Fig. 156. Madia. Elements of fruit in surface view, ep epicarp; /;> hypoderm; brpigment plates; / fiber bundle; S spermoderm with R raphe bundle; sc pitted cellsat base of spermoderm; £«i endosperm. Xi6o. (Winton.) forms extending in bundles toward the apex. These bundles appearto be distinct from the raphe and its ramifications. The Endosperm (Figs. 155 and 156, E) is represented by a singlelayer of thick-walled, often quadrilateral, aleurone-cells. Embryo. Beneath the outer epidermis of the folded cotyledons(Fig. 155, C) are several layers of isodiametric cells, but adjoining the innerepidermis are three to four layers of typical palisade cells. Aleuronegrains (2-6 /t) and fat are the only visible contents. 200 OIL SEEDS. DIAGNOSIS. Madia fruit has much the same structure as sunflower and nigerfruits; but is distinguished from the former by having no hair
Size: 2057px × 1214px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
