. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. 444 THE BIOLOGY OF HYDRA : 1961. 10 SB 20 30 MB 40 50 60 ST HOURS AFTER FEEDING 70 LT Fig. 3. DNA, RNA, and protein content of Hydra in different stages of budding. The symbols SB, MB, ST, and LT represent the small bud, medium bud, short tentacled, and long tentacled stage animals. These data reveal the first major chemical difference between par- ent and bud tissues, the DNA/ protein ratio of the bud being three times that of the parent Hydra. Since the experiments in Figure 3 gave no
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. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. 444 THE BIOLOGY OF HYDRA : 1961. 10 SB 20 30 MB 40 50 60 ST HOURS AFTER FEEDING 70 LT Fig. 3. DNA, RNA, and protein content of Hydra in different stages of budding. The symbols SB, MB, ST, and LT represent the small bud, medium bud, short tentacled, and long tentacled stage animals. These data reveal the first major chemical difference between par- ent and bud tissues, the DNA/ protein ratio of the bud being three times that of the parent Hydra. Since the experiments in Figure 3 gave no indication of the bud possessing this high DNA/protein ratio, another type of experiment was carried out to determine whether this high ratio was already present in an early stage of bud tissue. In these experiments (Fig. 5), we excised only the bud portion of a "medium bud" stage Hydra and then determined the respective chemical composition of the dissected parents and buds. It can be seen that, although there is much less protein in the dissected bud than in the remaining parent, the DNA contents of both parts are nearly equal. More striking is the high DNA/protein ratio of the dissected bud. These results. 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 work.. 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