Advertisement

Osmoregulation in the Halophilic Algae Dunaliella and Asteromonas

  • Ami Ben-Amotz
  • Mordhay Avron
Part of the Basic Life Sciences book series (BLSC, volume 14)

Abstract

The genus Dunaliella of the order Volvocales includes a variety of ill-defined species of unicellular green microscopic algae (Butcher, 1959). Members of the genus Dunaliella are generally ovoid in shape, 4-15μm wide and 10-25μm long. The cells are motile, due to the presence of two equal long flagellae in each cell, and contain one large cup-shaped chloroplast which occupies about half of the cell volume. The chloroplast contains a large pyrenoid surrounded by polysaccharide granules, the storage product.

Keywords

Salt Concentration Specific Growth Rate Glycerol Content Dunaliella Salina Osmoregulatory Mechanism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Avron, M. and Ben-Amotz, A., 1979, Metabolic adaptation of the alga Dunaliella to low water activity, in; “Strategies of Microbial Life in Extreme Environments,” M. Shilo, ed., Verlag Chemie, Weinheim, pp. 83–91.Google Scholar
  2. Ben-Amotz, A., 1975, Adaptation of the unicellular alga Dunaliella parva to saline environment, J. Phycol., 11: 44Google Scholar
  3. Ben-Amotz, A, and Avron, M., 1972, Photosynthetic activities of the halophilic alga Dunaliella parva, Plant Physiol., 49: 240.PubMedCrossRefGoogle Scholar
  4. Ben-Amotz, A. and Avron, M., 1973, The role of glycerol in osmotic regulation of the halophilic alga Dunaliella parva, Plant Physiol,, 51: 875.PubMedCrossRefGoogle Scholar
  5. Ben-Amotz, A. and Avron, M., 1974, Isolation, characterization and partial purification of an NADP+-dependent dihydroxyacetone reductase from the halophilic alga Dunaliella parva, Plant Physiol,, 53: 628.PubMedCrossRefGoogle Scholar
  6. Ben-Amotz, A. and Avron, M., 1978, On the mechanism of osmoregulation in Dunaliella, in: “Energetics and Structure of Halophilic Microorganisms,” S. R. Caplan and M. Ginzburg, eds., Elsevier, Amsterdam, pp. 529–541.Google Scholar
  7. Borowitzka, L. and Brown, A. D., 1974, The salt relations of marine and halophilic species of the unicellular green alga Dunaliella Arch. Microbiol., 96: 37.Google Scholar
  8. Borowitzka, L., Kessly, D. S. and Brown, A. D., 1977, The salt relations of Dunaliella. Further observations on glycerol production and its regulation, Arch. Microbiol., 113: 131.Google Scholar
  9. Brown, A. D., 1976, Microbial water stress, Bacteriol., Rev., 40; 803.Google Scholar
  10. Brown, A. D., 1977, Compatible solutes and extreme water stress in eukaryotic microorganisms, Adv. Microbiol. Physiol., 17: 181.CrossRefGoogle Scholar
  11. Butcher, R. W., 1959, An introductory account of the smaller algae of British coastal waters. I. Introduction and Chlorophyceae, Fish. Invest. Ser., 4: 1.Google Scholar
  12. Gimmler, H. and Schirling, R., 1978, Cation permeability of the plasmalemma of the halotolerant alga Dunaliella parva.. II, Cation content and glycerol concentration of the cells as dependent upon external NaCl concentration, Z., Pflanzenphysiol. 87: 487.Google Scholar
  13. Johnson, M. K., Johnson, E. J., McElory, R. D,, Speer, H, L., and Bruff, B. S., 1968, Effects of salts on the halophilic alga Dunaliella viridis, J. Bacteriol., 95: 1461.Google Scholar
  14. Kaplan, A. and Avron, M., 1980, Salt induced metabolic changes in D. salina, Plant Physiol., (in press).Google Scholar
  15. Larsen, H., 1967, Biochemical aspects of extreme halophilism, Adv. Microbiol. Physiol., 1: 97.CrossRefGoogle Scholar
  16. Lerner, H. R. and Avron, M., 1977, Dihydroxyacetone kinase activity in Dunaliella parva, Plant Physiol., 59: 15.PubMedCrossRefGoogle Scholar
  17. Okamoto, H. and Suzuki, I., 1964, Intracellular concentration of ions in the halophilic strains of Chlamydomonas. I. Concentration of Na, K and CI in the cell, Z. Allg. Microbiol., 4: 350Google Scholar
  18. Peterfi, L. S. and Manton, I., 1968, Observations with the electron microscope on Asteromonas gracilis Artari (Stephanoptera gracilis Artari) with some comparative observations on Duna-liella sp., Br. Phycol. Bull., 3: 423.CrossRefGoogle Scholar
  19. Schobert, B., 1977, Is there an osmotic regulatory mechanism in algae and higher plants ?, J. Theor. Biol., 68: 17.PubMedCrossRefGoogle Scholar
  20. Wegmann, K., 1971, Osmotic regulation of the photosynthetic glycerol production in Dunaliella, Biochim. Biophys. Acta, 234: 323.Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Ami Ben-Amotz
    • 1
  • Mordhay Avron
    • 2
  1. 1.Israel Oceanographic & Limnological ResearchHaifaIsrael
  2. 2.Biochemistry DepartmentThe Weizmann Institute of ScienceRehovotIsrael

Personalised recommendations