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1 September 2002 Phytate as the Sole Phosphate Source for Growth of Tetrahymena
HOPE T. ZIEMKIEWICZ, MARGARET D. JOHNSON, HARRIETT E. SMITH-SOMERVILLE
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Abstract

Phytate, the storage form of phosphate in seeds and grains, is a major form of environmental phosphate loading from fertilizer inputs and agricultural runoff. We have investigated the ability of Tetrahymena populations to grow on phytate as their sole phosphate source. Populations grew equally well in chemically defined medium with phosphate and medium in which the phosphate was replaced with phytate in comparable concentrations between 0.5 mM and 6 mM. Intracellular phytate concentrations of cells grown in phytate showed a 4–6-fold increase over those grown in phosphate when measured during the late stage of exponential growth. These results demonstrate that phytate can provide a source of adequate phosphate for sustained growth in phytate-rich environments.

HOPE T. ZIEMKIEWICZ, MARGARET D. JOHNSON, and HARRIETT E. SMITH-SOMERVILLE "Phytate as the Sole Phosphate Source for Growth of Tetrahymena," The Journal of Eukaryotic Microbiology 49(5), 428-431, (1 September 2002). https://doi.org/10.1111/j.1550-7408.2002.tb00223.x
Received: 30 April 2002; Accepted: 8 August 2002; Published: 1 September 2002
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KEYWORDS
heterotrophic protist
myo-inositol hexakisphosphate
phytate
Tetrahymena
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