. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 228 PETER V. FANKBONER. v> FIGURE 6. Enumerated successive stages of intracellular digestion of senescent zooxanthel- lae by amoebocytes lying within the interdiverticular spaces of the digestive gland of Tridacna gigas. (1), amoebocyte lysosomes burst their contents into vacuole containing the algal cell; (2), zooxanthella's periplast breaks down and cell outline becomes noticeably crenated; (3), chloroplast lamellae spread apart giving an overall bleached appearance to the zooxanthella; (4), digestive vacuole becomes re
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 228 PETER V. FANKBONER. v> FIGURE 6. Enumerated successive stages of intracellular digestion of senescent zooxanthel- lae by amoebocytes lying within the interdiverticular spaces of the digestive gland of Tridacna gigas. (1), amoebocyte lysosomes burst their contents into vacuole containing the algal cell; (2), zooxanthella's periplast breaks down and cell outline becomes noticeably crenated; (3), chloroplast lamellae spread apart giving an overall bleached appearance to the zooxanthella; (4), digestive vacuole becomes reduced in size due to seepage of fluid nutrients to the amoebo- cyte's cytoplasm. Abbreviations used are: ab, accumulation body; ca, calcium oxalate crystals; chl, chloroplast; dv, amoebocyte digestive vacuole ; n, nucleus; black points, amoebocyte lyso- somes bursting contents into digestive vacuole; white on black point, amorphous layer of thick periplast. when the amoebocyte's lysosomes burst their contents into the vacuole containing the algal cell; this vacuole is now termed the digestive vacuole (Fig. 6). Lyso- some involvement in the digestive process was verified according to the terms of de Duve (1963) on the basis of both morphology and a positive histochemical test for the presence of phosphomonoesterase II (Fig. 7). In the second stage of intracellular digestion, the zooxanthella's periplast begins to break down and the algal cell has become noticeably crenated. Chloroplasts remain quite electron dense,. 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. :
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
