Effects of UV radiation on DNA photodamage and production in bacterioplankton in the coastal Caribbean Sea

P.M Visser, E Snelder, A.J Kop, P. Boelen, A.G.J. Buma, F.C van Duyl

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    Abstract

    This study focuses on the effects of ultraviolet radiation (UVR) on bacterioplankton. The effect of different parts of the sunlight spectrum on the leucine and thymidine incorporation and on the induction of DNA damage in natural bacterial populations in the coastal Caribbean Sea off Curacao were investigated. DNA photodamage in microorganisms and biodosimeters was quantified by the number of cyclobutane dimers (thymine dimers). Increasing DNA damage during the day was found when incubated in full surface solar radiation. When UVBR was excluded no DNA damage was observed, indicating that thymine dimers were only formed by WE radiation. The amount of thymine dimers in the >0.8 mu m fraction was only one-third of the amount of induced thymine dimers in the

    Original languageEnglish
    Pages (from-to)49 - 58
    Number of pages10
    JournalAquatic Microbial Ecology
    Volume20
    Issue number1
    DOIs
    Publication statusPublished - 30-Nov-1999

    Keywords

    • UV radiation
    • bacterioplankton
    • DNA damage
    • bacterial production
    • phytoplankton
    • carbohydrates
    • ULTRAVIOLET-B RADIATION
    • PLANKTONIC MARINE-BACTERIA
    • DISSOLVED ORGANIC-MATTER
    • SOLAR-RADIATION
    • ANTARCTIC PHYTOPLANKTON
    • OZONE DEPLETION
    • GROWTH
    • SURFACE
    • WATERS
    • DAMAGE

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