Department of Botany and Microbiology, The University of Oklahoma, Norman, Oklahoma 73019.
INGESTION AND RETENTION OF CHROOMONAS SPP. (CRYPTOPHYCEAE) BY GYMNODINIUM ACIDOTUM (DINOPHYCEAE)1
Article first published online: 27 OCT 2004
Journal of Phycology
Volume 27, Issue 4, pages 525–529, August 1991
How to Cite
Fields, S. D. and Rhodes, R. G. (1991), INGESTION AND RETENTION OF CHROOMONAS SPP. (CRYPTOPHYCEAE) BY GYMNODINIUM ACIDOTUM (DINOPHYCEAE). Journal of Phycology, 27: 525–529. doi: 10.1111/j.0022-3646.1991.00525.x
Received 18 September 1990. Accepted 16 April 1991.
We thank Dr. Gary Camenisch, Mahalia Boyd, and John Goddard of the Missouri Department of Conservation for information on the 1987 bloom, Dr. Robert E. Lee for graciously providing us with cultures of Chroomonas sp., Dr. Lois Pfiester for her suggestions during the course of this research, and Robin White for preparation of the manuscript.
- Issue published online: 27 OCT 2004
- Article first published online: 27 OCT 2004
- chloroplast retention;
- Gymnodinium acidotum;
- Gymnodinium aeruginosum;
Gymnodinium acidotum Nygaard, a blue-green dinoflagellate previously shown to contain cryptophycean chloroplasts and other organelles, was observed from water and soil samples and in culture. The dinoflagellate excysts from soil samples as a mononucleated colorless cell that is positively phototactic. Colorless cells in unialgal culture remain colorless and can only be maintained less than one week whereas pigmented cells cultured unialgally grow for 10 days but then decline rapidly. Colorless cells cultured with Chroomonas spp. regain chloroplasts and have been maintained in mixed cultures for nine months. Fifty-seven percent of the dinoflagellates from mixed cultures are bi-nucleated, and three cells have been observed possibly ingesting cryptophytes. We suggest that cryptophycean chloroplasts are retained and possibly utilized by G. acidotum for at least ten days and then digested.