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Algae > Volume 9(2); 1994 > Article
Algae 1994;9(2): 225-235.
Seasonal Variation of Photosynthetic Activities and Heavy Metal Toxicities of Ulva Pertusa Kjellman
Mee Gyung Kim, Choon-Hwan Lee, Ik Kyo Chung
The Institute of Environment Research, Inje University. Department of Molecular Biology, Pusan National University. Department of Marine Science, Pusan National University
The effects of heavy metals on photosynthetic activities of Ulva pertusa were examined. Along with investigation of various environmental factors, the photosynthetic pigment content and in vivo chlorophyll a fluorescence induction kinetics were analyzed. The content of ambient nutrients was the primary component in relation to seasonal variation of photosynthetic activities in U. pertusa based on the principle component analysis. Toxic effects of mercury were most prominent compared to other metals examined. Effects on photosynthetic activities of U. pertusa were severe in copper treatment, moderate in cadmium and zinc. The toxic effects were apparent in summer while diminished in winter. Overall toxic effects of heavy metals on photosynthetic activities of U. pertusa were influenced by seasonal environmental factors, including nutrients contents and temperature.
Key words: seasonal variation, metal toxicity, photosynthetic activity, chlorophyll fluorescence, Ulva pertusa

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