CELL SURVIVAL CHARACTERISTICS AND MOLECULAR RESPONSES OF ANTARCTIC PHYTOPLANKTON TO ULTRAVIOLET‐B RADIATION 1
Comparison of cellular responses associated with photoenhanced repair and nucleotide excision (“dark”) repair indicated that light‐mediated correction of UV damage was an important factor in cell survival, and a general dependence of photoproduct induction and D37 values on cell size and shape was indicated.
Solar UVB-induced DNA damage and photoenzymatic DNA repair in antarctic zooplankton.
- K. D. Malloy, M. Holman, D. Mitchell, H. Detrich
- Environmental ScienceProceedings of the National Academy of Sciences…
- 18 February 1997
It is suggested that increased solar UV may reduce recruitment and adversely affect trophic transfer of productivity by affecting heterotrophic species as well as primary producers.
The Induction and Repair of DNA Photodamage in the Environment
Understanding of the molecular events that determine biological effects of UVR in complex higher eukaryotes is far from complete.
THE BIOLOGY OF THE (6–4) PHOTOPRODUCT
The data reviewed in this article support the notion that the (6-4) photoproduct and its Dewar photoisomer are important cytotoxic determinants of UV light.
Inhibition of bacterial activities by solar radiation in nearshore waters and the Gulf of Mexico
The effects of ultraviolet ( U V ) r a d ~ a t ~ o n on thymldine and leucine incorporation were evarmned In surface waters from the Gulf of Mexico and Santa Rosa Sound a mesotrophlc estuary In no]…
Long-term persistence of bacterial DNA
Diel and depth profiles of DNA photodamage in bacterioplankton exposed to ambient solar ultraviolet radiation
It is shown that bacteria are more susceptible to UV-B damage and may be as a more sensitive indicator of UV stress than other microorganisms, and wave action and mixing strongly influence the effects ofUV-B in surface waters, demonstl-ating that UV- B effects may not always be predictable from measures of UV radiatio~ attenuation.
Marine Bacterial Isolates Display Diverse Responses to UV-B Radiation
- F. Joux, W. Jeffrey, P. Lebaron, D. Mitchell
- Environmental ScienceApplied and Environmental Microbiology
- 1 September 1999
The results revealed that there are wide variations in marine bacteria in their responses to UV radiation and subsequent repair strategies, suggesting that UV-B radiation may affect the microbial community structure in surface water.
THE RELATIVE CYTOTOXICITY OF(6–4) PHOTOPRODUCTS AND CYCLOBUTANE DIMERS IN MAMMALIAN CELLS *
- D. Mitchell
- Biology, ChemistryPhotochemistry and Photobiology
- 1 July 1988
Photochemical data indicate that the pyrimidine(6‐4)pyrimidone photoproduct is induced at a substantial frequency compared to the cyclobutane dimer and that the action spectra for the induction of both lesions are equivalent.
A UV-sensitive mutant of Arabidopsis defective in the repair of pyrimidine-pyrimidinone(6-4) dimers.
In wild-type seedlings, repair of cyclobutane pyrimidine dimers occurred more slowly in the dark than in the light; repair of this photoproduct was not affected in the mutant.