. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter X 103— Duality of the Chondriome As is seen, a single difference is shown between the chondrio- somes and leucoplasts. Janus green stains the former more in- tensely than the latter with a solution of the dye. In recent work, Miss SOROKIN has maintained that Janus green did not stain the leucoplasts. This is inexact, but it is certain that under some conditions Janus green stains the chondriosomes more intensely than the leucoplasts. The chondriosomes and plastids of epidermal cells as well as the chondr
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter X 103— Duality of the Chondriome As is seen, a single difference is shown between the chondrio- somes and leucoplasts. Janus green stains the former more in- tensely than the latter with a solution of the dye. In recent work, Miss SOROKIN has maintained that Janus green did not stain the leucoplasts. This is inexact, but it is certain that under some conditions Janus green stains the chondriosomes more intensely than the leucoplasts. The chondriosomes and plastids of epidermal cells as well as the chondriosomes of Saprolegnia are preserved with the reagent iodine-potassium iodide which makes them brown and renders them much more distinct than in living material. Both these elements of the chondriome are preserved with a 2% solution of osmic acid which does not turn them brown but, if the preparation is treated with pyrogallol after being in contact with osmic acid for half an hour or an hour, the chondri- osomes and plastids appear gray. Both become even intensely black after being for a long time in a 40% solution of osmic acid (method of osmic impregnation used to reveal the Golgi mate- rial). Lastly, the chondriosomes and plastids of epidermal cells and the chondriosomes of Sa- prolegnia behave in exactly the same way in regard to fixatives. They are strongly modified and lose their chromaticity when treated with fixatives containing alcohol and acetic acid, and are preserved in their shapes and are stained clearly with all mitochondrial techniques (meth- ods of Regaud, Benda, Meves, Helly, Tupa, Volkonsky, Al- VARADO's modification of Rio- Hortega, etc.). They are stained by Dietrich - Smith's method (used for the detection of leci- thins) and after sufficient time by indophenol blue. This behavior, together with that described above, proves that the chondriosomes and plastids have a similar lipide constitution. MiLOViDOV was able, moreover, to show in the chondriosomes
Size: 1577px × 1584px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollection, booksubjectplantcellsandtissues
