. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REVISED DESCRIPTION OF SYMBIODINIUM Table 1 Cell wall layer thickness, total cell wall thickness, and ihecal vesicle thickness lull measurements in nanometers, mean ± sttl. 79 Symbiont species IL EDL OL Total thickness (in Thecal vesicle thickness («) Symbiodinium sp. S. microadriaticum S. bermudense ± ± ± (100) ± (100) ± ± (100) ± (100) ± (50) ±(100) EDL = electron dense layer. IL = inner layer, OL = outer layer; — indicates no visible
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REVISED DESCRIPTION OF SYMBIODINIUM Table 1 Cell wall layer thickness, total cell wall thickness, and ihecal vesicle thickness lull measurements in nanometers, mean ± sttl. 79 Symbiont species IL EDL OL Total thickness (in Thecal vesicle thickness («) Symbiodinium sp. S. microadriaticum S. bermudense ± ± ± (100) ± (100) ± ± (100) ± (100) ± (50) ±(100) EDL = electron dense layer. IL = inner layer, OL = outer layer; — indicates no visible layers. becomes increasingly thicker in the region of the division furrow (Fig. 3). Symbiodinium sp. from P. flosculifera and S. microadriaticum lacked this three-layered structure, the entire cell wall being similar in consistency to the IL layer of S. bermudense. A typical multilayered symbiosome membrane could be seen around the symbionts of all three host animals, but was most prevalent around S. bermudense (Figs. 1, 2, 4). The membranes that completely surrounded most symbionts seemed to be distributed evenly, but in some cases a dis- proportionate number of membranes were located to one side of the symbiont (Figs. 2. 4).. ac *•• 9 \\ ' " nu cw ch Figure 4. Symbiodinium bermudense within Aiptasia pallida. ac = accumulation body; ch = chloroplast; li = lipid vacuole; nu = nucleus; PV = pyrenoid; arrowhead indicates large number of membranes on only one side of symbiont. Scale bar = 2 Figure 5. Thecal vesicles in Symbiodinium bermudense. ch = chloro- plast; arrowheads indicate individual thecal vesicles. Scale bar = 500 nm. Figure 6. Symbiodinium sp. within the host Phylactis flosculifera. ac = accumulation body; ch = chloroplast; nu = nucleus; py = pyrenoid. Scale bar = 1 Figure 7. Thecal vesicle in Symbiodinium sp. from Ph\lactis floscu- lifera. ch = chloroplast; cw = cell wall; arrow = algal cell plasma membrane; arrowhead = thecal vesic
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
