𝔖 Bobbio Scriptorium
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Ecdysteroids and regeneration in the fiddler crabUca pugilator

✍ Scribed by Hopkins, Penny M.

Book ID
102892989
Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
660 KB
Volume
252
Category
Article
ISSN
0022-104X

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✦ Synopsis

Regeneration of lost walking legs in the fiddler crab Uca pugilator is divided into three distinct phases-wound healing, basal growth, and proecdysial growth. By means of HPLCI RIA analysis of levels and composition of endogenous ecdysteroid hormones and in vitro assays of 14C-leucine incorporation, we have determined that the transition between anecdysis and proecdysis is the point at which limb bud growth is most affected by ecdysteroids. The growth that occurs during proecdysis is programmed during the anecdysislproecdysis transition by a small peak of ecdysteroids (Peak I). Early exposure to 20-hydroxyecdysone at this critical window is necessary for further proecdysial growth of limb buds. The later peak of ecdysteroids (Peak 11) seen in the hemolymph of these crabs during late proecdysis does not seem to be involved in the regeneration process.

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