Abstract
Volatile sulfur compounds evolved from various unicellular algae during cultivation were fractionated to three different parts: thioether fraction, mercaptan fraction and H2S fraction. Major component of the volatile sulfur compounds produced from Amphidinium carterii, Glenodinium sp., Chlamydomonas sp., Nanochloris oculata, Haematococcus pluvialis, Polytoma uvella, Chlamydomonas komma, Scenedesmus obliquus, Chlorella vulgaris and Chlorella pyrenoidosa was H2S, and that from Astasia longa and Euglena gracilis was mercaptan. Gyrodinium cohnii, a heterotrophic dinoflagellate of marine origin evolved thioether as the major product. The thioether fraction obtained from Gyrodinium cohnii, was found by gas chromatographic analysis to be principally composed of dimethyl sulfide. These data suggested that the ability of unicellular algae to produce thioether, mercaptan or H2S was related to some extent to the metabolic type or the environmental factors of natural habitats of the organism. This work was supported in part by research grant from the Ministry of Education, Japan.
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