## Abstract The forelimb of the newt, __Triturus (Notophthalamus) viridescens__, was bilaterally amputated and the animals subjected to different photoperiods during the period of regeneration, namely (1) continuous light, (2) 15 hours of light/day and (3) total darkness. Animals exposed to continu
The effect of limiting light to the pineal on the rate of forelimb regeneration in the newt
β Scribed by Maier, C. Eberhardt ;Singer, Marcus
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 300 KB
- Volume
- 219
- Category
- Article
- ISSN
- 0022-104X
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Newts with bilaterally amputated forelimbs were exposed to either continuous light (LL), total darkness (DD), or continuous light with the dorsal head epithelium painted with an India ink and Nile blue sulfate mixture (LLβIIβNBS) that limited light penetration through the skull to the pineal. The LLβIIβNBS animals regenerated their forelimbs more slowly than their counterparts in LL.
π SIMILAR VOLUMES
## Abstract A cyclic seasonal variation in forelimb regeneration in the newt, __Notophthalmus viridescens__, was noted under controlled environmental conditions at 20Β°C in previous experiments. Regeneration was enhanced in the summer months and reached its maximum linear growth rate in late springβ
## Abstract The cyclic adenosine 3β²β5β²βmonophosphate content of four regenerate stages in the forelimb of the newt, __Triturus viridescens__, was assayed using the Gilman method and compared to the content in the normal, unamputated, forelimb. The concentration was found to be highest in the earlie
The concentrations of thyroxine (TJ and triiodothyronine (T,) were determined on samples of fresh sera from adult male and female newts during the course of forelimb regeneration by means of radioimmunoassay (RIA) methods. The results show that the circulatory levels of T, and T3 in males and female
The persistence of cartilage in the adult newt (Notophthalmus uiridescens) forelimb skeletal regenerate has recently been reported by Libbin et al. ( J . Exp. Zool., '88). It is particularly evident in the carpal group, which remains cartilaginous for at least 9 months while all other regrown skelet