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Effects of nutrient limitation on constituents of Ankistrodesmus falcatus algae

February 21st, 2007 | No Comments | Posted in Algae-Cultivation, Algae-Nutrients

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Effects of nutrient limitation on biochemical constituents of Ankistrodesmus falcatus

Kilham, Susan S.; Kreeger, Daniel A.; Goulden, Clyde E.; Lynn, Scott G.
Freshwater Biology (1997), 38(3), 591-596 CODEN: FWBLAB; ISSN: 0046-5070. English.


Cell size and volume changed as a function of the type of resource limitation, with nitrogen-limited cells being smaller and less dense and phosphorus-limited cells being larger and more dense than non-limited cells. The major biochem. constituents of the green alga Ankistrodesmus falcatus varied as a function of nitrogen or phosphorus limitation (15% of maximum growth rate) compared to cells growing at their maximum rate. Nitrogen-limited cells had much lower protein content and phosphorus-limited cells had higher carbohydrate and lipid contents than cells growing under no limitation. Phosphorus-limited cells had a higher total lipid content than either nitrogen-limited or non-limited cells, but the lipid class composition was similar. The protein:lipid ratio was lowest (0.38) in the nitrogen-limited cells, intermediate in the phosphorus-limited cells (0.44) and highest in the non-limited control cells (1.14).

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