Skip to main content
Log in

A novel free-living prochlorophyte abundant in the oceanic euphotic zone

  • Letter
  • Published:

From Nature

View current issue Submit your manuscript

Abstract

The recent discovery of photosynthetic picoplankton has changed our understanding of marine food webs1. Both prokaryotic2,3 and eukaryotic4,5 species occur in most of the world's oceans and account for a significant proportion of global productivity6. Using shipboard flow cytometry, we have identified a new group of picoplankters which are extremely abundant, and barely visible using traditional microscopic techniques. These cells are smaller than the coccoid cyanobacteria and reach concentrations greater than 105 cells ml–1 in the deep euphotic zone. They fluoresce red and contain a divinyl chlorophyll a-like pigment, as well as chlorophyll b, α-carotene, and zeaxanthin. This unusual combination of pigments, and a distinctive prokaryotic ultrastructure, suggests that these picoplankters are free-living relatives of Prochloron7. They differ from previously reported prochlorophytes—the putative ancestors of the chloroplasts of higher plants—in that they contain α-carotene rather than β-carotene and contain a divinyl chlorophyll a-like pigment as the dominant chlorophyll.

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

Access this article

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

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Photosynthetic Picoplankton (eds Platt, T. & Li, W. K. W.) Can. Bull. Fish. Aquat. Sci. Vol. 214 (1986).

  2. Johnson, P. W. & Sieburth, J. McN. Limnol. Oceanogr. 24, 928–935 (1979).

    Article  ADS  Google Scholar 

  3. Waterbury, J. B., Watson, S. W., Guillard, R. R. L. & Brand, L. E. Nature 277, 293–294 (1979).

    Article  ADS  Google Scholar 

  4. Johnson, P. W. & Sieburth, J. McN. J. Phycol. 18, 318–327 (1982).

    Article  Google Scholar 

  5. Murphy, L. S. & Haugen, E. M. Limnol. Oceanogr. 30, 47–58 (1985).

    Article  ADS  Google Scholar 

  6. Platt, T., Subba Rao, D. V. & Irwin, B. Nature 301, 702–704 (1983).

    Article  ADS  CAS  Google Scholar 

  7. Lewin, R. A. & Withers, N. W. Nature 256, 735–737 (1975).

    Article  ADS  CAS  Google Scholar 

  8. Olson, R. J., Vaulot, D. & Chisholm, S. W. Deep Sea Res. 32, 1273–1280 (1985).

    Article  ADS  Google Scholar 

  9. Olson, R. J., Chisholm, S. W., Zettler, E. R. & Armbrust, E. V. Deep Sea Res. 35, 425–440 (1988).

    Article  ADS  CAS  Google Scholar 

  10. Herbland, A. & Voituriez, B. J. mar. Res. 37, 87–101 (1979).

    CAS  Google Scholar 

  11. Lewin, R. A. in The Prokaryotes Vol. 1 (eds Starr, M. P., Stolp, H., Truper, H. G., Balows, A. & Schlegel, H. G.) 257–266 (Springer, Berlin, 1981).

    Book  Google Scholar 

  12. Waterbury, J. B., Watson, S. W., Valois, F. W. & Franks, D. G. in Photosynthetic Phyloplanklon (eds Platt, T. & Li, W. K. W.) 71–120 (Can. Bull. fish. aquat. Sci., Ottawa, 1986).

    Google Scholar 

  13. Watson, S. W., Valois, F. W. & Waterbury, J. B. in The Prokaryoles (eds Starr, M. P., Stolp, H., Truper, H. G., Balows, A. & Schlegel, H. G.) 1005–1022 (Springer, Berlin, 1981).

    Book  Google Scholar 

  14. Ward, B. B. J. mar. Res. 40, 1155–1172 (1982).

    Google Scholar 

  15. Goodwin, T. W., The Biochemistry of Carolenoids Vol. 1, second edition (Chapman and Hall, London, 1980).

    Book  Google Scholar 

  16. Guillard, R. R. L., Murphy, L. S., Foss, P. & Liaaen-Jensen, S. Limnol. Oceanogr. 30, 412–414 (1985).

    Article  ADS  CAS  Google Scholar 

  17. Foss, P. R. A., Lewin, S. & Liaaen-Jensen, S. Phycologia 26, 142–144 (1987).

    Article  CAS  Google Scholar 

  18. Withers, N. W. et al. Proc. natn. Acad. Sci. U.S.A. 75, 2301–2305 (1978).

    Article  ADS  CAS  Google Scholar 

  19. Burger-Wiersma, T., Veenhuis, M., Korthals, H. J., Van de Wiel, C. C. M. & Mur, L. R. Nature 320, 262–264 (1986).

    Article  ADS  CAS  Google Scholar 

  20. Wood, A. M. J. Phycol. 15, 330–332 (1979).

    Article  CAS  Google Scholar 

  21. Gieskes, W. W. & Kraay, G. W. Limnol. Oceanogr. 28, 757–766 (1983).

    Article  ADS  CAS  Google Scholar 

  22. Bazzaz, M. B. Photobiochem. Photobiophys. 2, 199–207 (1981).

    CAS  Google Scholar 

  23. Bazzaz, M. B. & Brereton, R. G. FEBS Lett. 138, 104–108 (1982).

    Article  CAS  Google Scholar 

  24. Strickland, J. D. H. & Parsons, T. R. A Practical Handbook of Seawater Analysis, second edition (Bull. 167, Fish. Res. Bd. Can., Ottawa, 1972).

    Google Scholar 

  25. Fitzwater, S. E., Knauer, G. A. & Martin, J. H. Limnol. Oceanogr. 27, 544–551 (1982).

    Article  ADS  CAS  Google Scholar 

  26. Li, W. K. W. in Photosynthetic Phytoplankton (eds Platt, T. & Li, W. K. W.) 251–286 (Can. Bull. fish, aqual. Sci., Ottawa, 1986).

    Google Scholar 

  27. Mantoura, R. F. C. & Llewellyn, C. A. Analyt. chim. Acta 151, 297–314 (1983).

    Article  CAS  Google Scholar 

  28. Davies, B. H. in Chemistry and Biochemistry of Plant Pigments Vol. 2 (ed. Goodwin, T. W.) 38–165 (Academic, London, 1976).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Chisholm, S., Olson, R., Zettler, E. et al. A novel free-living prochlorophyte abundant in the oceanic euphotic zone. Nature 334, 340–343 (1988). https://doi.org/10.1038/334340a0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/334340a0

  • Springer Nature Limited

This article is cited by

Navigation