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  • sequential accumulation of starch and lipid induced by sulfur deficiency in chlorella and parachlorella species

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 837
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the influence of sulfur deficiency on biomass production was analyzed in the four chlorellaceae species, chlorella vulgaris, chlorella sorokiniana, chlorella lobophora, and parachlorella kessleri. culturing under sulfur-deficient conditions promoted transient accumulation of starch followed by a steady increase in lipid storage. transmission electron microscopy indicated an increase and decrease in starch granules and subsequent enlargement of lipid droplets under sulfur-deficient conditions. chlorellaceae spp. accumulated 1.5–2.7-fold higher amounts of starch and 1.5–2.4-fold higher amounts of lipid under sulfur-deficient conditions than under sulfur-sufficient conditions. more than 75% of the fatty acids that accumulated in chlorellaceae spp. under the sulfur-sufficient condition were unsaturated and culturing under sulfur-deficient conditions increased the saturated fatty acid content from 24.3% to 59.7% only in p. kessleri. these results indicate that the sequential accumulation of starch and lipid is a response to the sulfur depletion that commonly occurs in chlorellaceae spp.

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