. Cell physiology and pharmacology. Cells. 122 RESPONSES OF CELLS ON THE BIOLOGICAL LEVEL Artificial Parthenogenesis In Fig. 20 we see arranged a list of agents which are com- petent to cause artificial parthenogenesis. The first group including substances such as fatty acids, saponin and organic bases, have in conamon the possibility that they may act upon the surface of the cell causing, as Superficial cytolysis (fatty acidi, saponin, etc) Pricking Ultraviolet light. ». Permeability change (change in resting potential?) Dehydration by hypertonic! Dehydration after_ hypotonicity Cold-
. Cell physiology and pharmacology. Cells. 122 RESPONSES OF CELLS ON THE BIOLOGICAL LEVEL Artificial Parthenogenesis In Fig. 20 we see arranged a list of agents which are com- petent to cause artificial parthenogenesis. The first group including substances such as fatty acids, saponin and organic bases, have in conamon the possibility that they may act upon the surface of the cell causing, as Superficial cytolysis (fatty acidi, saponin, etc) Pricking Ultraviolet light. ». Permeability change (change in resting potential?) Dehydration by hypertonic! Dehydration after_ hypotonicity Cold- Gelation in endoplasm â Aster formation Aster growth Cell division Fig. 20. Mode of action of agents causing artificial parthenogenesis suggested, a superficial cytolysis to arise, or to become incipient. With some species activation may also be secured by totally different methods such as pricking, the use of ultra-violet light, treatment with hypertonic or hypotonic solutions, and treatment at low temperatures. So far as is known, there is no common mechanism which can be acted upon by these diverse agents and processes. But all the reagents ultimately lead to cell division, and. 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 Danielli, J. F. (James Frederic), 1911-. New York, Elsevier
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