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ALGAE > Volume 8(2); 1993 > Article
ALGAE 1993;8(2): 231-237.
The Developmental Sequence of the Marine Red Alga Grateloupia filicina in Culture
Young-Meng Chiang
Institute of Oceanography, National Taiwan University
ABSTRACT
Tetrasporophyte development from carpospores of Grateloupia filicina was studied in culture. The spores germinate to form radially expanded crusts with a meristematic marginal portion one-cell layer thick. One to three erect, cylindrical seedlings are produced from the center of the crust. Production of seedling was studied under 80 combinations of temperature (18,22, 26 and 30 degree C), light intensity (10,18,40, 62 and 84 μ Em super(-2)s super(-1)) and photoperiod (11:13, 12:12, 13:11 and 14:10). Crusts grown at 10 and 18 μEm super(-2)s super(-1) sis not produce seedlings but grew vegetatively and issued some short, branched filaments. Seedlings were produced at 40,62, and 84 μEm super(-2)s super(-1) under all conditions and the number of crusts bearing seedlings increased with an increase in light intensity irrespective of temperature and photoperiod. At 40, 62 and 84 μEm super(-2)s super(-1), high temperature stimulated th seedling production, but the effect of temperature was not apparent at 10 and 18 μEm super(-2)s super(-1). Photoperiod had no effect.
Key words: aquaculture, Grateloupia filicina, Halymeniaceae, temperature, light intensity, photoperiod, Rhodophyta, seaweed cultivation


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