Eur. J. Entomol. 91 (2): 189-196, 1994
Eclosion hormone-like immunoreactivity in the nervous system of Bombyx mori (Lepidoptera: Bombycidae) and Antheraea yamamai (Lepidoptera: Saturniidae) before and after hatching
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A monoclonal antibody to Bombyx mori eclosion hormone (EH) reacted in whole mounts of the nervous system from pharate and freshly hatched larvae of this species with 4 ventromedial brain neurons and a pair of nerve fibers runing down the ventral nerve cord. Weak immunoreactivity was occasionally detected in similar whole preparations of the nervous system from Antheraea yamamai. In paraffin sections of the nervous system of A. yamamai, an EH-like antigen was found in 4 ventromedial brain neurons, in 2 or 3 pairs of neurons in each of the ventral ganglia, and in a pair of nerve fibers extending through the nerve cord. The intensity of immunostaining in diapausing and post-diapausing pre-hatched larvae, and in the newly hatched first-instar larvae, was similar. Midgut endocrine cells were also examined but no reaction with the anti-EH antibody was detected.
Keywords: Embryonic diapause, eclosion hormone, neurohormones, KK-42, silkworm, silkmoth, midgut
Accepted: February 21, 1994; Published: May 15, 1994 Show citation
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