Photorecovery from the effects of ultraviolet radiation in salamander larvae

✍ Scribed by Blum, Harold F. ;Matthews, Margie R.

• Book ID: 102880312
• Publisher: Wiley (John Wiley & Sons)
• Year: 1952
• Tongue: English
• Weight: 744 KB
• Volume: 39
• Category: Article
• ISSN: 0095-9898
• DOI: 10.1002/jcp.1030390105

✦ Synopsis

Since photorecovery after ultraviolet radiation was described two years ago by Kelner ( '49) in a fungus it has been found elsewhere in the animal and plant kingdom. The present paper reports it in salamander larvae; apparently the first example found in a vertebrate, or any animal above the echinoderms. The characterization of this effect and its differentiation from other photobiological phenomena with which it may be confused a r e also dealt with.

EXPERIMENTAL

Larvae of Arnblystoma maculatum were used in most of the experiments; larvae of A . opacum in a few, with similar results. The animals were raised in the laboratory from eggs collected in North Carolina or the Princeton area. They were kept in in'dividual dishes of pond water and fed a mixed diet of Emchytrea worms and Dnphnin.

F o r exposure to ultraviolet radiation the larvae were placed in flat dishes with just sufficient water to cover thcm. The source of radiation was a n intermediate pressure merciirp arc, which was monitored with a photoelectric cell. The characterization of the radiation and the method of rneasure-'Briefly reported by the authors (1950).