A COMPARISON OF FIVE EFFECTS OF ULTRAVIOLET LIGHT ON THE ARBACIA EGG

Author:

Blum Harold F.1,Cook John S.1,Loos Gordon M.1

Affiliation:

1. From the National Cancer Institute, National Institutes of Health, Public Health Service, Department of Health, Education, and Welfare, Bethesda; the Department of Biology, Princeton University, Princeton; and the Marine Biological Laboratory, Woods Hole

Abstract

The demonstration of five different effects of ultraviolet radiation on the sea urchin's egg indicates that more than one basic photochemical process goes on there. Photorecovery is observed in only one of these. The need for caution in interpreting such effects is obvious. Evidence for a different mechanism for the timing of cleavage in eggs activated by ultraviolet radiation as compared to normally fertilized eggs is presented. The bearing of these studies on survival curves for microorganisms is discussed.

Publisher

Rockefeller University Press

Subject

Physiology

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