Sterols of Tetraselmis (Prasinophyceae)

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Abstract

  • 1.

    1. Sterols were identified from 11 isolates of Tetraselmis, a unicellular Prasinophyte alga used frequently as food in mariculture.

  • 2.

    2. The principal sterol in eight isolates was either 24-methylenecholesterol or 24-methylcholesterol; the latter was determined to be campesterol in all cases.

  • 3.

    3. Campesterol is the first 24α sterol to be reported in the Prasinophyceae.

  • 4.

    4. In the remaining three isolates, cholesterol was the principal sterol with smaller amounts of 24-methylenecholesterol and campesterol present; in two of these strains total sterol approached 3% of dry weight.

  • 5.

    5. This is the first report of cholesterol as the principal sterol of a Prasinophyte; the C28 sterols found in Tetraselmis are the dominant sterols in most Prasinophyceae studied to date.

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