Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7081770 | Bioresource Technology | 2013 | 33 Pages |
Abstract
Photosynthetic carbon partitioning into starch and neutral lipids, as well as the influence of nutrient depletion and replenishment on growth, pigments and storage compounds, were studied in the microalga, Parachlorella kessleri. Starch was utilized as a primary carbon and energy storage compound, but nutrient depletion drove the microalgae to channel fixed carbon into lipids as secondary storage compounds. Nutrient depletion inhibited both cellular division and growth and caused degradation of chlorophyll. Starch content decreased from an initial value of 25, to around 10% of dry weight (DW), while storage lipids increased from almost 0 to about 29% of DW. After transfer of cells into replenished mineral medium, growth, reproductive processes and chlorophyll content recovered within 2Â days, while the content of both starch and lipids decreased markedly to 3 or less % of DW; this suggested that they were being used as a source of energy and carbon.
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Authors
Bruno Fernandes, José Teixeira, Giuliano Dragone, António A. Vicente, Shigeyuki Kawano, KateÅina BiÅ¡ová, Pavel PÅibyl, Vilém Zachleder, Milada VÃtová,