. Colchicine in agriculture, medicine, biology, and chemistry. Colchicine; Colchicine. in B. J)' D Fig. —Oedogonium cultures, treated and untreated. A. Untreated cell showing the usual ring and cellular striations. B. Enlargement caused by colchicine, indentation of cellular layers a result of treatment. C. Inner cell thickening, and depositions. D. En- largement of the cell from treatment and irregular depositions. (After Gorter) An interesting vascularization lollowing recovery from colchicine has been described for the huge cells in Allium roots that form in the differentiated pericycle
. Colchicine in agriculture, medicine, biology, and chemistry. Colchicine; Colchicine. in B. J)' D Fig. —Oedogonium cultures, treated and untreated. A. Untreated cell showing the usual ring and cellular striations. B. Enlargement caused by colchicine, indentation of cellular layers a result of treatment. C. Inner cell thickening, and depositions. D. En- largement of the cell from treatment and irregular depositions. (After Gorter) An interesting vascularization lollowing recovery from colchicine has been described for the huge cells in Allium roots that form in the differentiated pericycle at points where lateral roots originate. Scalari- form vessels developed and a unique tumor was left buried in the ; Nuclear contents that were estimated to contain over 1000 chromosomes as a result of 6 or more c-mitoses disappeared during the differentiation process. A complex series of pretreatmtnt with NAA ( per cent) and colchicine ( per cent) inters|)crsed with recovery periods preceded this development. No one can doubt that an interesting problem of differentiation is presented by this work. Stomatal development regularly proceeds from an embryonic mother cell and eventually forms the guard cells,^'"*'i"*''^"^ with as-. 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 Eigsti, O. J. (Orie Jacob), 1908-; Dustin, Pierre. Ames, Iowa State College Press
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