| The Effects of Copper on the Early Stages of Undaria pinnatifida (Harv.) Suringar (Laminariales, Phaeophyta) under Temperature-Irradiance Gradient
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| Jin-Ae Lee, Yang-Il Sunwoo, Hye-Joo Lee, In-Ho Park, Ik-Kyo Chung
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Department of Environmental Science, Inje University, Department of Biology, Dong-A University, Department of Marine Science, Pusan National University
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| ABSTRACT |
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The effects of copper were investigated in the economic brown alga Undaria pinnatifida under the temperature-irradiance gradient. On the meiospore settlement and germination, there was not significant effect of irradiance. However, the effects of temperature and copper concentration were significant, and the interaction between temperature and copper treatment was prominent. Copper treatment at high temperature was more detrimental to the gametophyte development. The growth of gametophytes was retarded under suboptimal temperature range and higher copper concentrations. The optimum, condition of the gametophyte growth was 14℃ and 50 μEm super(-2)s super(-1). Irradiance became significant at the later stages of gamtophyte development. The chlorophyll contents and the electron transport activities in sporophyte were significantly reduced under 100 μg Cu l super(-1) added samples.
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| Key words:
copper, development stage, temperature-irradiance gradient, Undaria pinnatifida. |
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