. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BOTRYLLUS GENETICS AND DEVELOPMENT 239 of the cells determining the characteristics of the zooids so produced. To this end, advantage was taken of the ability of morphologically different colonies to fuse (Bancroft, 1903). Colonies differing in color pattern were made contiguous; a small proportion of them fused gelatinous tests and vascular systems, thus permit- ting (indeed, necessitating) a complete interchange of blood cells. A week after fusion, all zooids and buds were removed from the fused colonies, leaving only thei
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BOTRYLLUS GENETICS AND DEVELOPMENT 239 of the cells determining the characteristics of the zooids so produced. To this end, advantage was taken of the ability of morphologically different colonies to fuse (Bancroft, 1903). Colonies differing in color pattern were made contiguous; a small proportion of them fused gelatinous tests and vascular systems, thus permit- ting (indeed, necessitating) a complete interchange of blood cells. A week after fusion, all zooids and buds were removed from the fused colonies, leaving only their common vascular systems (and tests). Separate portions of each colony were taken before fusion and maintained for comparison with the zooids to be regenerated. In over 30 cases, the zooids produced by vascular budding in turn produced systems identical to the parent systems originally present at the site of the bud. There were no exceptions. This proves that, whatever the contributions of the freely circulating blood cells, the fixed cells of the delicate vascular walls (or conceivably of the test) determine the phenotype of the regenerated zooids (Milkman and Therrien, 1965). Figure 3 illustrates the experiment. No buds were seen at the original fusion border; this is probably a statistical matter. Perhaps a somatic recombinant could be obtained if a bud of dual origin 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
