. Foundations of botany. Botany; Botany. Fig. 178.—Conjugation of Cells of Green Algse. (Much magnified.) I. Conjugation of Desmids. .<1, a single plant in its ordinary condition; £, empty cell-wall of another individual; C, conjugation of two individuals to form a spore by union of their cell-contents. n. Conjugation of Spirogyra. A, two iilaments of Spirogyra side by side, with the contents of adjacent cells uniting to form spores, z. At the bottom of the figure the process is shown as beginning at the top as completed, and the cells of one filament emptied; B, a single filament of anothe
. Foundations of botany. Botany; Botany. Fig. 178.—Conjugation of Cells of Green Algse. (Much magnified.) I. Conjugation of Desmids. .<1, a single plant in its ordinary condition; £, empty cell-wall of another individual; C, conjugation of two individuals to form a spore by union of their cell-contents. n. Conjugation of Spirogyra. A, two iilaments of Spirogyra side by side, with the contents of adjacent cells uniting to form spores, z. At the bottom of the figure the process is shown as beginning at the top as completed, and the cells of one filament emptied; B, a single filament of another kind of Spirogyra, containing two spores, one lettered z. {A magnified 240 diameters, B 150 diameters.) a period of rest, a new individual develops. In Spirogyra each cell of the filament appears to be an individual and can conjugate like the one-celled desmids. It is not easy to watch the process, since the spore-formation takes place at night. It is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
Size: 1168px × 2140px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
