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On the Assimilation of Phosphorus in Chlorella pyrenoidosa

On the Assimilation of Phosphorus in Chlorella pyrenoidosa A. A. AL KHOLY Red Sea Marine Biotogicat Station, Cairo University (Bceeivcd December 1, 1955) Ketchum (1939) showed how the amounts of phosphorus and nitrogen vary in cells of the plankton algae Nitzsehia ciosterimn and Chlorella pyrenoidosa. It" these algae weri' growing in a medium deficient in phosphorus, cells were produced showing a P-content one third of the normal found by him. This phosphorus deficii'ncy could be recovered if phosphate was added to the medium. The absorptiou of P took place bolh in ligbl and in the dark. These observations were verified by Mackereth (1953), wbo used cells of the diatom Asterionella formosa. This author obtained a minimum amount of 0.06 X 10^" (ig P per cell. In tbe present article an experimental series witb Cblorella pyrenoidosa is published. Some few similar series were made. During tbese experiments cells deficient in pbospborus were produced aud tbe absolutely possible minimum value of P per celt was ascertained. Tbe absorption of P by deficient cells in light was followed at the same time. Tbe following tbree P-components were determined: dissolved inorganic phosphate, dissolved organic P, and participate P. In Ihe present invesligation particulate P was identical with tbe P found http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physiologia Plantarum Wiley

On the Assimilation of Phosphorus in Chlorella pyrenoidosa

Kholy, A. A. Al
Physiologia Plantarum , Volume 9 (1) – Jan 1, 1956
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References (5)

Publisher
Wiley
Copyright
Copyright © 1956 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0031-9317
eISSN
1399-3054
DOI
10.1111/j.1399-3054.1956.tb08995.x
Publisher site
See Article on Publisher Site

Abstract

A. A. AL KHOLY Red Sea Marine Biotogicat Station, Cairo University (Bceeivcd December 1, 1955) Ketchum (1939) showed how the amounts of phosphorus and nitrogen vary in cells of the plankton algae Nitzsehia ciosterimn and Chlorella pyrenoidosa. It" these algae weri' growing in a medium deficient in phosphorus, cells were produced showing a P-content one third of the normal found by him. This phosphorus deficii'ncy could be recovered if phosphate was added to the medium. The absorptiou of P took place bolh in ligbl and in the dark. These observations were verified by Mackereth (1953), wbo used cells of the diatom Asterionella formosa. This author obtained a minimum amount of 0.06 X 10^" (ig P per cell. In tbe present article an experimental series witb Cblorella pyrenoidosa is published. Some few similar series were made. During tbese experiments cells deficient in pbospborus were produced aud tbe absolutely possible minimum value of P per celt was ascertained. Tbe absorption of P by deficient cells in light was followed at the same time. Tbe following tbree P-components were determined: dissolved inorganic phosphate, dissolved organic P, and participate P. In Ihe present invesligation particulate P was identical with tbe P found

Journal

Physiologia Plantarum – Wiley

Published: Jan 1, 1956

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