. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. »» • ' «i 1HHHHHHI FIGURE 6. (A and B) General views of cytoplasm of the prothoracic gland in the diapaus- ing stage. Undeveloped agranular-ER, lipid droplets, glycogen particles and free ribosomes etc. are seen; scale 1 /*. did not appear (Fig. 7A). With the progress of the cyclic activity in the gland, the nucleus contained numerous chromatin blocks and few nucleolei and became irregu- lar (Fig. 7B). Then the nucleus began to branch out into the cytoplasm (Fig. 7C). The nuclear folding seems to have an important role in th
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. »» • ' «i 1HHHHHHI FIGURE 6. (A and B) General views of cytoplasm of the prothoracic gland in the diapaus- ing stage. Undeveloped agranular-ER, lipid droplets, glycogen particles and free ribosomes etc. are seen; scale 1 /*. did not appear (Fig. 7A). With the progress of the cyclic activity in the gland, the nucleus contained numerous chromatin blocks and few nucleolei and became irregu- lar (Fig. 7B). Then the nucleus began to branch out into the cytoplasm (Fig. 7C). The nuclear folding seems to have an important role in the interaction between the nucleus and the cytoplasm. In this stage, the information necessary for the syn- thesis of the secretory substances must be transferred from the nucleus to the cyto- plasm. After passing this stage, secretory substances began to appear in the cytoplasm of the prothoracic glands (Fig. 4). The secretory substances gradually be- came large in size and finally the cytoplasm was filled with the secretory substances (Fig. 5). Although the releasing mechanisms were unclear, they were released from the cell to the hemolymph. Agranular-ER, which is believed to synthesize the steroid hormone, began to develop in the peripheral region with the progress of nuclear folding. They were arranged to encircle a relatively narrow intracellular space and formed randomly interconnecting tubes in the peripheral region (Fig. 8). With the progress of the development of agranular-ER, the contact figures between agranular-ER and mitochondria were observed in some places (Fig. 9). This seemed to indicate the transfer of some substances from the agranular-ER to the mitochondria. After that, the deformation of mitochondria was seen in some parts of the cytoplasm. The deformation coincided well with the schematic drawings provided by Wilde (1969). At first, mitochondria were swollen with less dense interiors and their cristae became unclear. Then these organelles were more swo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
