Skip to main content
SpringerLink
Log in

Effect of light and temperature on the bleaching of the yellow mutant y-1 ofEuglena gracilis

  • Published:
Protoplasma Aims and scope Submit manuscript

Summary

The yellow mutant y-1 ofEuglena gracilis, whose plastids are chlorophyll-deficient, is stable only in the dark and at suboptimal growth temperatures (below 26 ‡C).

At growth temperature of 30 ‡C (in darkness) this strain is unstable and undergoes permanent bleaching. The process is enhanced by light so that bleaching may be increased up to 100 per cent. The degree of bleaching is proportional to light intensity.

Bleaching is possible only during the active cell division. In the resting medium there is no bleaching, but total carotenoid synthesis is stimulated by illumination. At suboptimal growth temperature (26 ‡C) the mutant is bleached only in the light, if light intensity exceeds 2,000 Lux. The results indicate that the process of bleaching in the yellow mutant is much more sensitive to temperature and light than in wild typeEuglena.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Baker, H, S. H. Hutner, andH. Sobotka, 1955: Nutritional factors in thermophily: a comparative study of bacilli andEuglena. Ann. N. Y. Acad. Sci.62, 349–376.

    Google Scholar 

  • Buetow, D. E., 1962: Differential effects of temperature on the growth ofEuglena gracilis. Exp. Cell Res.27, 137–142.

    PubMed  Google Scholar 

  • Gibor, A., andS. Granick, 1962: The plastid system of normal and bleachedEuglena gracilis. J. Protozool.9, 327–334.

    Google Scholar 

  • Leff, J., andN. I. Krinsky, 1967: A mutagenic effect of visible light mediated by endogenous pigments inEuglena gracilis. Science158, 1332–1334.

    PubMed  Google Scholar 

  • Marčenko, E., 1970: The effect of illumination regimen on temperature-induced and spontaneous bleaching inEuglena gracilis. Acta Bot. Croat.29, 27–32.

    Google Scholar 

  • —, 1973: Plastids of the yellow Y-1 strain ofEuglena gracilis. Protoplasma76, 417–433.

    PubMed  Google Scholar 

  • Meynell, G. G., andE. Meynell, 1965: Theory and practice in experimental bacteriology. Cambridge: University Press.

    Google Scholar 

  • Pringsheim, E. G., andO. Pringsheim, 1951: Experimental elimination of chromatophores and eye-spot inEuglena gracilis. New Phytol.51, 65–76.

    Google Scholar 

  • Stern, A. I., H. T. Epstein, andJ. A. Schiff, 1964: Studies of chloroplast development inEuglena. VI. Light intensity as controlling factor in development. Plant Physiol.39, 226–231.

    Google Scholar 

  • Uzzo, A., andH. Lyman, 1969: Light-dependence of temperature-induced bleaching inEuglena gracilis. Biochim. biophys. Acta180, 573–575.

    PubMed  Google Scholar 

Download references

Author information

Author notes

  1. Elena Marčenko

    Present address: Institute Rudjer Bošković, Bijenička cesta 54, YU-41000, Zagreb, Yugoslavia

Authors and Affiliations

    Authors
    1. Elena Marčenko
      View author publications

      You can also search for this author in PubMed Google Scholar

    Rights and permissions

    Reprints and permissions

    About this article

    Cite this article

    Marčenko, E. Effect of light and temperature on the bleaching of the yellow mutant y-1 ofEuglena gracilis . Protoplasma 82, 119–123 (1974). https://doi.org/10.1007/BF01276875

    Download citation

    • Received:

    • Issue Date:

    • DOI: https://doi.org/10.1007/BF01276875

    Keywords

    Search

    Navigation