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ALGAE > Volume 7(1); 1992 > Article
ALGAE 1992;7(1): 109-119.
Gametogenesis and Early Sporophyte Development of Laminaria religiosa Miyabe in the East Coast of Korea
Jin Ae Lee
Department of Environmental Science, Inje University
ABSTRACT
Ecotypic populations of Laminaria religiosa in the east coast of Korea were monitored from October 1989 to investigate growth and reproductive phenology at near southern limit of its distribution in East Sea of Korea. Plants exhibited an annual growth pattern with maximum in June. Most of the morphological parameters showed the similar seasonal pattern and reached maximum values in June. Blade disintegration occurred during the summer months. Reproductive sporophytes occurred from October to December 1989. Young sporophyte population was observed in March, which was assumed to be the result of the late fall sporogenesis activity. Reproduction and growth in gametophytes and growth in juvenile sporophytes were studied in relation to temperature and irradiance. Although no seasonal variation was found, higher irradiance (80 μEm super(-2) sec super(-1)), and temperature of 4-12℃ resulted in greater activities.
Key words: Laminaria religiosa, ecotype, meiospore germination, gametophyte, gametogenesis, sporophyte, photon fluence rate, temperature


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