Abstract
Abstract UV damage to LPP-1, a DNA virus that infects the blue-green alga Plectonema boryanum, can be partially reversed by illuminating the alga subsequent to infection. Photoreactivation is induced by white or blue light but not by red or “black light” (maximum intensity at 356 mg). Since red light supports photosynthesis, there is apparently no interdependence between photosynthesis and photoreactivation. The UV-irradiated alga was photoreactivated by “black light” as well as by white or blue light. The finding that. “black light” restores algal but not viral replication suggests that the mechanisms respectively involved in the photorepair of viral and algal nucleic acids are dissimilar.
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