. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTION OF 259 arations, the dormant stolons of all species studied are filled with blood cells. The most abundant cells are spherical and contain coarse eosinophilic granules in the cytoplasm. These cells function as trophocytes and can be identified as granular amoebocytes in the terminology of the previous authors, though their size and appearance are somewhat variable with the species (Fig. 4B-D). In addition to the granular amoebocytes, berry-like cells consisting of bright yellowish-green bodies, the gr
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTION OF 259 arations, the dormant stolons of all species studied are filled with blood cells. The most abundant cells are spherical and contain coarse eosinophilic granules in the cytoplasm. These cells function as trophocytes and can be identified as granular amoebocytes in the terminology of the previous authors, though their size and appearance are somewhat variable with the species (Fig. 4B-D). In addition to the granular amoebocytes, berry-like cells consisting of bright yellowish-green bodies, the green cells, are relatively common in the dormant stolons of all species. Morula cells, which are intensely stained with hematoxylin and eosin, are found in the dormant stolons of/3, japonica and P. sagamiensis; but this cell class is absent from the blood of P. formosana. Terminal budding in Perophora japonica It was found that in P. japonica the distal tip of a growing stolon turns into a kind of asexual reproductive body, which is eventually severed from the stolon and drifts away to found a new colony. This type of asexual reproduction has never been reported before, and is termed "terminal budding" in this paper. Terminal buds at various stages of formation are shown in Figure 5A. In a "normal" stolon, the growing tip is fully attached to the substratum by the lower side, and the septum usually terminates in a flattened vesicle (Fig. 6A). At the start of terminal budding, a distal portion of the stolon rises up off the glass plate, losing contact with the substratum, and grows into a hyperplastic bulge. Then, the terminal. FIGURE 5. Terminal buds of P. japonica. A: Terminal buds at various stages of their formation. Extremely thin stolons are of hydrozoan colonies, z, zooid. X8. B: Isolated terminal buds. X8. C: Section of an early terminal bud. Blood cells, mostly granular amoebocytes, are accumulated in the lumen; septal walls are branched. x70. D: Part
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
