Display options
Share it on

Planta. 1987 Feb;170(2):181-9. doi: 10.1007/BF00397886.

Rates of glycolate synthesis and metabolism during photosynthesis of Euglena and microalgae grown on low CO2.

Planta

A Yokota, S Kitaoka

Affiliations

  1. Department of Agricultural Chemistry, University of Osaka Prefecture, 591, Sakai, Osaka, Japan.

PMID: 24232876 DOI: 10.1007/BF00397886

Abstract

The rate of glycolate excretion in Euglena gracilis Z and some microalgae grown at the atmospheric level of CO2 was determined using amino-oxyacetate (AOA). The extracellular O2 concentration was kept at 240 μM by bubbling the incubation medium with air. Glycolate, the main excretion product, was excreted by Euglena at 6 μmol·h(-1)·(mg chlorophyll (Chl))(-1). Excretion depended on the presence of AOA, and was saturated at 1 mM AOA. A substituted oxime formed from glyoxylate and AOA was also excreted. Bicarbonate added at 0.1 mM did not prevent the excretion of glycolate. The excretion of glycolate increased with higher O2 concentrations in the medium, and was competitively inhibited by much higher concentrations of bicarbonate. Aminooxyacetate also caused excretion of glycolate from the green algae, Chlorella pyrenoidosa, Scenedesmus obliquus and Chlamydomonas reinhardtii grown on air, at the rates of 2-7 μmol·h(-1)·(mg Chl)(-1) in the presence of 0.2-0.6 mM dissolved inorganic carbon, but the cyanobacterium, Anacystis nidulans, grown in the same way did not excrete glycolate. The efficiency of the CO2-concentrating mechanism to suppress glycolate formation is discussed on the basis of the magnitude of glycolate formation in these low-CO2-grown cells.

References

  1. Planta. 1982 Jun;155(1):95-6 - PubMed
  2. Plant Physiol. 1982 Sep;70(3):760-4 - PubMed
  3. Arch Mikrobiol. 1973 Dec 4;94(1):11-28 - PubMed
  4. Arch Biochem Biophys. 1980 Apr 15;201(1):247-54 - PubMed
  5. Plant Physiol. 1981 Jul;68(1):28-32 - PubMed
  6. Planta. 1985 Jul;165(1):59-67 - PubMed
  7. Arch Biochem Biophys. 1985 Nov 1;242(2):507-14 - PubMed
  8. Plant Physiol. 1983 Aug;72(4):1084-7 - PubMed
  9. Plant Physiol. 1980 Sep;66(3):407-13 - PubMed
  10. Arch Biochem Biophys. 1985 Nov 1;242(2):498-506 - PubMed
  11. Plant Physiol. 1949 Jan;24(1):1-15 - PubMed
  12. Eur J Biochem. 1972 Feb 15;25(2):366-71 - PubMed
  13. Plant Physiol. 1986 Feb;80(2):341-5 - PubMed
  14. Plant Physiol. 1983 Aug;72(4):1075-83 - PubMed
  15. Plant Physiol. 1981 Feb;67(2):229-32 - PubMed
  16. J Bacteriol. 1980 Sep;143(3):1253-9 - PubMed
  17. Science. 1983 Dec 2;222(4627):1009 - PubMed
  18. Arch Biochem Biophys. 1983 Dec;227(2):425-33 - PubMed
  19. Biochem Biophys Res Commun. 1985 Sep 30;131(3):1075-9 - PubMed
  20. Biochem Biophys Res Commun. 1983 Mar 16;111(2):544-50 - PubMed
  21. Planta. 1985 Jun;164(3):308-20 - PubMed
  22. Planta. 1980 Jun;149(1):78-90 - PubMed
  23. Planta. 1980 Aug;149(3):219-26 - PubMed
  24. Plant Physiol. 1985 Mar;77(3):735-9 - PubMed

Publication Types