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Photorecovery from the effects of ultraviolet radiation in salamander larvae

Photorecovery from the effects of ultraviolet radiation in salamander larvae

Journal of Cellular Physiology 39(1): 57-72

Illumination with wavelengths between 0.3[mu] and 0.5[mu] greatly increases the survival time and the recovery of capacity for growth and regeneration of Ambystoma larvae that have been subjected to repeated small doses of u.-v. radiation ([lambda] 0.313[mu] and shorter), but only if applied after exposure to the latter. Wavelengths 0.3[mu] to 0.5[mu] have no observable effect on larvae that have not been exposed to u.-v. radiation. Photorecovery or photoreactivation-found among bacteria, fungi and echinoderms has these same characteristics, which may serve to differentiate this phenomenon from other examples of ostensible "antagonism." The mechanism for photorecovery after u.-v. radiation is widely spread in the plant and animal kingdoms, suggesting that it is a vestige remaining from very early evolutionary times.

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Accession: 025235329

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PMID: 14907818

DOI: 10.1002/jcp.1030390105

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