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Diapause factor producing cells in the suboesophageal ganglion of the silkworm, Bombyx mori L






Proc Jap Acad 43(1): 51-56

Diapause factor producing cells in the suboesophageal ganglion of the silkworm, Bombyx mori L

The subesophageal ganglion is the source of the factor responsible for the production of diapause eggs, and the brain activates the ganglion through the esophageal connectives. By surgical excising or transplanting experiments it was demonstrated that the site of production of diapause factor is a limited region of the subesophageal ganglion situated slightly caudad to its center. Histological and in toto observations on fresh materials show a pair of conspicuous neurosecretory cells. The function of producing the diapause factor is attributed to these cells.


Accession: 024478011



Related references

Fukuda, S.; Takeuchi, S., 1967: Studies on the diapause factor-producing cells in the suboesophageal ganglion of the silkworm, Bombyx mori L. Embryologia 9(4): 333-353

Matsutani, K.; Sonobe, H., 1987: Control of diapause-factor secretion from the suboesophageal ganglion in the silkworm, Bombyx mori: the roles of the protocerebrum and tritocerebrum. To localize any functional areas in the brain which control the secretion of the diapuase factor from the suboesophageal ganglion in the Bombyx silkworm, various parts of the brain were excised or transected surgically. It was demonstrated that co...

Park, Ke, 1973: The fine structure of the diapause-regulator cell in the suboesophageal ganglion in the silkworm, Bombyx mori. In the suboesophageal ganglion of Bombyx mori the diapause-regulator producing cells which may give information to the diapause-factor cells were found by means of electron microscopy.

Hasegawa, K.; Shimizu, I., 1990: Gabaergic control of the release of diapause hormone from the suboesophageal ganglion of the silkworm, Bombyx mori. Brain-suboesophageal ganglion complexes and suboesophageal ganglia were isolated from silkworm pupae destined to lay diapause eggs and pupae destined to lay non-diapause eggs and incubated in Grace's insect medium for 24 h. Diapause hormone r...

Sato, Y.; Ikeda, M.; Yamashita, O., 1994: Neurosecretory cells expressing the gene for common precursor for diapause hormone and pheromone biosynthesis-activating neuropeptide in the suboesophageal ganglion of the silkworm, Bombyx mori. Diapause hormone (DH) is a neurohormone which is secreted from suboesophageal ganglion (SG) and responsible for induction of embryonic diapause in the silkworm, Bombyx mori. DH is generated along with four other functionally different neuropeptide...

Hasegawa, K., 1964: Studies On The Mode Of Action Of The Diapause Hormone In The Silkworm, Bombyx Mori L. Ii. Content Of Diapause Hormone In The Suboesophageal Ganglion. Journal of Experimental Biology 41: 855-863

Hasegawa, K.; Shimizu, I., 1987: In vivo and in vitro photoperiodic induction of diapause using isolated brain-suboesophageal ganglion complexes of the silkworm, Bombyx mori. By use of a bivoltine silkworm race which shows a long-day photoperiodic response after induction during the last (5th) instar, we tried to programme photoperiodic induction in the isolated brain-suboesophageal ganglion complex in vivo and in vitr...

Sato, Y.; Oguchi, M.; Menjo, N.; Imai, K.; Saito, H.; Ikeda, M.; Isobe, M.; Yamashita, O., 1993: Precursor polyprotein for multiple neuropeptides secreted from the suboesophageal ganglion of the silkworm Bombyx mori: characterization of the cDNA encoding the diapause hormone precursor and identification of additional peptides. Peptidergic neurons, which serve as source of various endocrine neuropeptides, were identified in the suboesophageal ganglion (SG) and brain of insects. In the silkworm Bombyx mori, SG is known to secrete two neuropeptides, diapause hormone (DH) r...

Sonobe, H.; Hiyama, Y.; Keino, H., 1977: Changes in the amount of the diapause factor in the subesophageal ganglion during development of the silkworm bombyx mori. Changes in the diapause factor content of the subesophageal ganglion of the silkworm were examined from the viewpoint of sex and voltinism differences. The diapause factor content was comparatively low from the 4th larval ecdysis to the larval-pup...

Nagatomo, T., 1956: Function of the brain-suboesophageal ganglion complex in the silkworm, Bombyx mori. Proc Acad., Tokyo: 500-503