Firing Activities of Neurosecretory Cells Producing Diapause Hormone and its Related Peptides in the Female Silkmoth, Bombyx mori. I. Labial Cells(Physiology)
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概要
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There are three known clusters of neurosecretory cells expressing a gene encoding diapause hormone (DH) and four related peptides in the suboesophageal ganglion (SOG) of Bombyx mori. Long-term chronic recordings were made from the axonal tract (NCC-3) of a pair of cells localized in the labial (posterior) neuromere of SOG during pupal-adult development. There was a significant difference in firing activity patterns of the labial neurosecretory cells between diapause-egg and non-diapause-egg producers: labial cells in the former were active throughout pupal-adult development, whereas the same cells in the latter usually maintained an inactive state until the last quarter of pupal-adult development, a time at which a secretion of DH seems to be too late to act on the developing ovary for the induction of diapausing eggs. This observation strongly supports the notion that labial cells release DH and are responsible for determination of embryonic diapause in the silkmoth.
- 社団法人日本動物学会の論文
- 2003-08-25
著者
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Ichikawa T
Kyushu Univ. Fukuoka Jpn
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Ichikawa Toshio
Department Of Biology Faculty Of Science Kyushu University
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