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Dose dependence of DNA repair in rainbow trout (Oncorhynchus mykiss) larvae exposed to UV-B radiation

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Abstract

We examined survival and DNA damage in rainbow trout larvae (Oncorhynchus mykiss) resulting from a range of sublethal to lethal ultraviolet-B exposures in the presence and absence of photoreactivating radiation. We found that after low, sublethal UV-B exposures trout larvae are quite proficient at photoenzymatic repair but that this capacity decreases exponentially with the total incident UV-B dose. The relationship between the dose dependence of PER and trout development and vulnerability in fisheries and in the natural environment are discussed.

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Abbreviations

CPD:

Cyclobutane pyrimidine dimer

mb:

Megabase

NER:

Nucleotide excision repair

PER:

Photoenzymatic repair

PRR:

Photorepair radiation

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Mitchell, D.L., Adams-Deutsch, T. & Olson, M.H. Dose dependence of DNA repair in rainbow trout (Oncorhynchus mykiss) larvae exposed to UV-B radiation. Photochem Photobiol Sci 8, 75–81 (2009). https://doi.org/10.1039/b807469k

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