Effects of UV-B Radiation on Thalassiosira Pseudonana: A Preliminary Study
Effects of differing levels of ultraviolet-B radiation on cell concentrations, maximum specific growth rates, and pigment content of the diatom Thalassiosira pseudonana were investigated. Increased UV-B compared to the base UV-B level (intended to simulate the natural level of UV-B present in the environment) tended to show detrimental effects in all parameters. When compared to our normal culture conditions (UV-B excluded), even the base level of UV-B radiation showed detrimental effects in all parameters except chlorophyll a concentrations, the only tested parameter which increased with the addition of UV-B radiation.
KeywordsMaximum Specific Growth Rate Normal Culture Condition Solar Ultraviolet Radiation Thalassiosira Pseudonana Filter Treatment
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- Caldwell, M. M. and D. S. Nachtwey. 1975. Expected changes in solar UV radiation. In: Grobecker, A. J. [ed.]. Impacts of Climatic Change on the Biosphere. CIAP Monogr. 5 (DOT-TST-75–55), Part 1: Ultraviolet Effects. Department of Transportation, Washington, D. C. 1. 4–1. 10.Google Scholar
- Clayton, R. K. 1977. Light and living matter. Vol. 2 Kreiger Publishing Company, New York.Google Scholar
- Eppley, R. W. and J.D.H. Strickland. 1968. Kinetics of marine phytoplankton growth. In: Droop, M. R. and E. J. F. Wood [eds.]. Advances in Microbiology of the sea. Academic Press, New York. 23–62.Google Scholar
- Halldal, Per and 0rn Taube. 1972. Ultraviolet action and photoreactivation in algae. In: A. C. Giese [ed.], Photo physiology, Vol. 7. Academic Press, New York. 163–188.Google Scholar
- Jerlov, N. G. 1976. Mar. Opt. Elsevier Scientific Publishing Company.Google Scholar
- Parsons, T. and M. Takahaski. 1973. Biological oceano- graphic processes. Pergamon Press, New York.Google Scholar
- Standard methods for the examination of water and waste water (Fourteenth edition). 1975. American Public Health Association, Washington, D. C.Google Scholar
- Thomson, B. E., R. C. Worrest, and H. VanDyke. 1980. The growth response of an estuarine diatom (Melosira nummuloides [Dillw.] Ag.) to UV-B (280–320 nm) radiation. Estuaries (1): 69–72.Google Scholar
- Westinghouse Corp. 1977. Product Information. Atlanta, Georgia.Google Scholar
- Yentsch, C. S. and R. W. Lee. 1966. A study of photosynthetic light reactions and a new interpretation of sun and shade phytoplankton. J. of Mar. Res. 24: 319–337.Google Scholar