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Plant and Cell Physiology, 1970, Vol. 11, No. 2 281-292
© 1970

Article

Properties of Chlorella cells grown under various photo-heterotrophic conditions

HISATERU MITSUDA1, HISAO NAKAMURA2 and KYODEN YASUMOTO1

1Department of Food Science and Technology, Faculty of Agriculture, Kyoto University Kyoto
2Department of Nutrition, Koshien University Takarazuka, Japan

1. Chlorella ellipsoidea was cultured under photo-heterotrophic conditions. Cells showed most favorable growth when 0.2% glucose was added at the start to the inorganic nutrient medium.

2. Treatment with a mixed solvent, methanol/hexane: 4/3, gave highly decolorized cells. Molasses alone and pyruvate in combination with glucose or with molasses and glucose were effective in obtaining a high yield of chlorophyll and carotenoid pigments.

3. The nitrogen content was lower in bleached cells than in normal cells. Protein yield obtained by the urea soaking method was higher with bleached cells than with normal cells.

4. Electron microscopic studies revealed that the outer part of normal cells consists of two layers, an electron-dense inner layer and an electron-lucent outer layer, whereas, that of bleached cells consists of only an electron-dense layer.

(Received August 28, 1969; )
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