INDUCTION OF PRECOCIOUS MOLTING AND CLAW TRANSFORMATION IN ALPHEID SHRIMPS BY EXOGENOUS 20-HYDROXYECDYSONE
نویسندگان
چکیده
منابع مشابه
Depression of synaptic efficacy at intermolt in crayfish neuromuscular junctions by 20-hydroxyecdysone, a molting hormone.
This report demonstrates that ecdysteroids can reduce synaptic transmission at an intermolt stage of a crustacean tonic neuromuscular junction by acting at a presynaptic site. The steroid molting hormone, 20-hydroxyecdysone (20-HE), appears to act through a rapid, nongenomic mechanism that decreases the probability of synaptic vesicle release and reduces the number of release sites. Quantal ana...
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The Alpheidae-possibly the most diverse family of recent decapod crustaceans-offers attractive opportunities to study the evolution of many intriguing phenomena, including key morphological innovations like spectacular snapping claws, highly specialized body forms, facultative and obligate symbioses with many animal groups, and sophisticated behaviors like eusociality. However, studies of these...
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The insect steroid hormone 20-hydroxyecdysone (20E) acts through a specific nuclear receptor complex, ecdysone receptor (EcR) and ultraspiracle (USP). EcR and USP are FXR/LXR and RXR orthologs, respectively, which play critical roles in the regulation of lipid metabolism in mammals. Lipid concentration in Bombyx hemolymph and lipase activity in fat body peaked during molting and pupation, sugge...
متن کاملDifferential effects of a molting hormone, 20-hydroxyecdysone, on the neuromuscular junctions of the claw opener and abdominal flexor muscles of the American lobster
Intracellular recordings at the neuromuscular junction of the dactyl opener muscle and the abdominal phasic flexor muscle of intermolt lobsters were made in the presence and absence of the steroid hormone, 20-hydroxyecdysone (20-HE). Evoked excitatory junctional potentials (EJPs) were recorded from both muscles; spontaneous miniature excitatory junctional potentials (MEJPs) were recorded from t...
متن کاملcompactifications and representations of transformation semigroups
this thesis deals essentially (but not from all aspects) with the extension of the notion of semigroup compactification and the construction of a general theory of semitopological nonaffine (affine) transformation semigroup compactifications. it determines those compactification which are universal with respect to some algebric or topological properties. as an application of the theory, it is i...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1987
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1541714