Variations in pigment contents of the diatom Phaeodactylum tricornutum during growth |
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Authors: | J. I. Carreto J. A. Catoggio |
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Affiliation: | (1) Instituto de Biología Marina, Mar del Plata, Argentina;(2) Departamento de Química Analítica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina |
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Abstract: | Changes in the amounts of chlorophyll a, chlorophyll c, fucoxanthin, diadinoxanthin and -carotene were determined during Phaeodactylum tricornutum growth. The transition of the culture from the logarithmic to the stationary phase is accompanied by an increase in the carotenoids: chlorophyll a ratio, associated with variations in the percentage of individual carotenoids. While fucoxanthin content decreases with the age of the culture, diadinoxanthin content increases and -carotene remains almost constant. The furanoid isomer of diadinoxanthin, absent during logarithmic growth, appears increasingly during the nutrient-deficient period. Changes in the amounts of chlorophyll a, chlorophyll c and fucoxanthin are quite similar. |
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