Accession Number:

AD0271578

Title:

THE EFFECT OF CARBON DIOXIDE CONCENTRATION, LIGHT INTENSITY AND ISONICOTINYL HYDRAZIDE ON THE PHOTOSYNTHETIC PRODUCTION OF GLYCOLLIC ACID BY CHLORELLA

Descriptive Note:

Corporate Author:

QUEEN MARY COLL LONDON (ENGLAND)

Report Date:

1961-11-14

Pagination or Media Count:

1.0

Abstract:

Glycollic acid production by Chlorella was measured by colorimetric determination of the acid excreted into the medium. Glycollic acid production was at a maximum at a low concentration of carbon dioxide but it tended toward zero as the rate of photosynthesis approached carbon dioxide saturation. The production of the acid became measurable at light intensities approaching that required to saturate photosynthesis and increased steadily with further increase in intensity. Treatment with isonicotinyl hydrazide resulted in an approximately three-fold stimulation of glycollic acid concentration over the range of conditions used. It is suggested that the precursor of glycollic acid is ribulose diphosphate, and that isonicotinyl hydrazide acts by inhibiting the further metabolism of glycollic acid. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE