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Fig. 27. Change of growth (lower) and toxin production (upper) of Alexandrium tamarense after addition of nitrate (1.0 mM) or yeast extract (20 mg·L–1) under N-limited condition. Nitrate and yeast extract were added at a time indicated by arrow. N: Culture supplemented with nitrate, Y: Culture supplemented with yeast extract, B: Control culture. Reprinted from Ogata et al., Utilization of organic substances for growth and toxin production by Alexandrium tamarense. In: Yasumoto, Oshima and Fukuyo (eds). Harmful and Toxic Algal Blooms. Intergovernmental Oceanographic Commission of UNESCO, Paris. 1996, pp. 343–346, Fig. 2.

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