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Algae 1991;6(2): 193-202. |
| A Cytochemical Study on Energy-storage System Including Poly-β-hydroxybutyrate and Polyphosphate in a Blue-green Alga chlorogloea fritschii
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| Soon-Ae Yoo, Ki Sung Lee, Young Sic Park
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Department of Biology, Pai Chai University, Department of Biology, Hanyang University
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| ABSTRACT |
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In order to elucidate the interrelationship between PHB and poly-P body, and their physiological role as energy storage compounds of blue-green algal cell, Chorogloea fritschii was cultured under various conditions (Pi-free or sufficient and/or different light/dark photoperiod), and then the changes of amounts of PHB and poly-P in the cell were analyzed cytochemically. Under Pi-starved dark condition, outstanding increase of PHB granules and lipid granules, thickening of sheath were observed. Under Pi-sufficient and 12 hr light/12 hr dark photoperiod, synthesis of poly-P, glycogen, and polyhedral body, and development of thylakoid membrane were observed. From the ultramicrography, we observed that PHB granules were formed from the thylakoid membrane, membrane-monolayer bounded, and forming large complex granule with cyanophycin granule at Pi-sufficient culture.
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| Key words:
PHB, poly-P, glycogen, cyanophycin granule, polyhedral body, sheath, optimal condition for PHB synthesis, biodegradable plastic |
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