. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. BERNARD L. STREHLER 385 cise area in which one would expect it (see Fig. 11). The enzymes (and lysosomes?) are locahzed in a pedal disc, although there is some accumulation even in cells that presumably are differentiating into lysosome-containing cells higher on the column. I think this would be interesting to study — the kinds of structures which con- tain the enzyme and whether they are similar to those which are present in other animals. Notice that acid phosphatase occurs both in th
. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. BERNARD L. STREHLER 385 cise area in which one would expect it (see Fig. 11). The enzymes (and lysosomes?) are locahzed in a pedal disc, although there is some accumulation even in cells that presumably are differentiating into lysosome-containing cells higher on the column. I think this would be interesting to study — the kinds of structures which con- tain the enzyme and whether they are similar to those which are present in other animals. Notice that acid phosphatase occurs both in the gastrodermal and ectodermal layer. We were interested to see whether there are changes in the numbers of similar granules in Campanidaria, particularly in the tentacular region where regression starts. In the young hydranth, there is very little acid phosphatase activity. By contrast, there are enormous numbers of very uniformly sized granules in the 10-day- old hydranth as was shown in Figure 8. Note the deposition of acid phosphatase positive material along the cytoplasmic septa separat- ing the gastrodermal cells in the tentacles of a 9-day-old hydranth shown in Figure 12. These cells have huge vacuoles with an om- mentum-like cytoplasmic extension containing the nucleus hanging. Fig. 11. Accumulation of acid phosphatase-positive granules in the pedal disc of Hydra. Gomori stain. 500X magnification. (From Brock and Strehler, unpublished).. 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 Symposium on the Physiology and Ultrastructure of Hydra and Some Other Coelenterates (1961 : Coral Gables, Fla. ); Lenhoff, Howard M; Loomis, W. Farnsworth (William Farnsworth), 1914-. Coral Gables, Fla. , University of Miami Press
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