Abstract
PREVIOUS investigations of the relationship in Chlorella between rate of photosynthesis at high light intensities and concentration of carbon dioxide have been made using cells suspended in alkaline solutions1. In such solutions cells grown in 4 per cent carbon dioxide show an unusually long induction phase (t½, 40–50 min.) at low concentrations of carbon dioxide; but when allowance is made for this and the rate of photosynthesis in the steady state alone considered, half the maximum rate is attained with a concentration of carbon dioxide2 of 0.9 × 10−6 M at 25° C. The possibility has been suggested that in alkaline solution the relatively high concentration of bicarbonate ion affects the rate of photosynthesis3.
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References
Whittingham, C. P., Ph.D. thesis, Cambridge (1949).
Briggs, G. E., and Whittingham, C. P., New Phytol., 51, 236 (1952).
Steemann Nielsen, E., Physiol. Plantarum, 5, 145 (1952).
Egle, K., and Schenk, W., Beiträge z. Biol. der Pflanzen, 29, 75 (1951).
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WHITTINGHAM, C. Rate of Photosynthesis and Concentration of Carbon Dioxide in Chlorella. Nature 170, 1017–1018 (1952). https://doi.org/10.1038/1701017b0
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DOI: https://doi.org/10.1038/1701017b0
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