. Studies on the plant cell. Plant cells and tissues. ' - -^ â / H â¢'â¢s x:^ â ''??. Fig. 5.â Metapliases of Mito'sis. «, Saprolegnia; intranuclear spindle in oogonium, nucle- olus outside of spindle. ^, Erysiphe ; mitosis in ascus, asters with rather small centro- spheres. c, Corallina; first mitosis in tetraspore mother-cell, very large and well differentiated centrospheres. rf, Zamia; blunt poled intranuclear spindle in central cell of pollen grain ; blepharoplasts, their outer membrane about to break up. c, Pellia; first mitosis in spore mother-cell; broad spindle with rounded po
. Studies on the plant cell. Plant cells and tissues. ' - -^ â / H â¢'â¢s x:^ â ''??. Fig. 5.â Metapliases of Mito'sis. «, Saprolegnia; intranuclear spindle in oogonium, nucle- olus outside of spindle. ^, Erysiphe ; mitosis in ascus, asters with rather small centro- spheres. c, Corallina; first mitosis in tetraspore mother-cell, very large and well differentiated centrospheres. rf, Zamia; blunt poled intranuclear spindle in central cell of pollen grain ; blepharoplasts, their outer membrane about to break up. c, Pellia; first mitosis in spore mother-cell; broad spindle with rounded poles, the very numerous spin- ^dle fibers ending in granular kinoplasm. f. Agave; first and second mitoses in pollen mother-cells ; (i), multipolar spindle just previous tn metaphase; the several independent cones of fibrillas gather more closely together to complete the spindle. (2) metaphase of second mitoses; completed spindles showing however the several independent cones of fibrillas. (After Harper, Webber and Osterhout.) only divide longitudinally. This matter has considerable theo- retical interest, which will be considered in Section V, and also in connection with the spore mother cell (Section III). The daughter chromosomes are drawn apart by the contraction of the fibrillae to which they are attached. Chromosomes may take on various forms during metaphase,. 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 Davis, Bradley Moore, 1871-. [Boston, Ginn and Co.
Size: 1467px × 1703px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherbosto, bookyear1904
