Fine structure of an unusual cytoplasmic inclusion in the diatom genus,Rhopalodia
- 205 Downloads
Ellipsoidal to ovoid inclusions in the diatomsRhopalodia gibba andR. gibberula were examined in the electron microscope.
The inclusions are 4 to 6 microns wide, 5 to 7 microns long and separated from the diatom cytoplasm by a five-layered wall.
Lamellae about 16 mμ wide and 25 mμ apart occur near the periphery, with oil droplets and aggregations of 18 to 22 mμ particles occurring between them.
They are neither pyrenoids nor oil bodies.
They may be unique cell organelles whose function is unknown or possibly modified coccoid blue-green algae.
The cytoplasm of the two species ofRhopalodia resembles that of other diatoms.
KeywordsElectron Microscope Fine Structure Cell Organelle Cytoplasmic Inclusion Unique Cell
Unable to display preview. Download preview PDF.
- Bowen, C. C., 1956: Freezing by liquid carbon dioxide in making slides permanent. Stain Tech.31, 87–90.Google Scholar
- Desikachary, T. V., 1959: Cyanophyta, Ind. Coun. Agri. Res., New Delhi.Google Scholar
- Drum, R. W., 1963: Cytoplasmic fine structure of the diatom,Nitzschia palea. J. Cell Biol.18, 429–440.Google Scholar
- —, and H. S. Pankratz, 1964: Pyrenoids, raphes and other fine structure in diatoms. Amer. J. Bot.51, 405–418.Google Scholar
- Fogg, G. E., 1953: The metabolism of algae. John Wiley & Sons, Inc., New York.Google Scholar
- Fritsch, F. E., 1945: The structure and reproduction of the algae II. Macmillan Co., New York.Google Scholar
- Gibbs, S. P., 1962: The ultrastructure of the chloroplasts of algae. J. Ultrastructure Res.7, 418–435.Google Scholar
- Hall, W., and G. Claus, 1963: Ultrastructural studies on the blue-green algal symbiont inCyanophora paradoxa. J. Cell Biol.,19, 551–563.Google Scholar
- Heinzerling, H., 1908: Der Bau der Diatomeenzelle. Biblioth. Bot.69, 1–95.Google Scholar
- Klebahn, H., 1896: Beiträge zur Kenntnis der Auxosporenbildung. I.Rhopalodia gibba. J. wiss. Bot.29, 595–654.Google Scholar
- Luft, J. H., 1961: Improvements in epoxy resin embedding methods. J. Biophys. Biochem. Cytol.9, 409–414.Google Scholar
- Pankratz, H. S., and C. C. Bowen, 1963: Cytology of the blue-green algae. I. The cells ofSymploca muscorum. Amer. J. Bot.50, 387–399.Google Scholar
- Ris, H., and R. N. Singh, 1961: Electron microscope studies on blue-green algae. J. Biophys. Biochem. Cytol.9, 63–80.Google Scholar
- Sabatini, D. D., K. Bensch, and R. J. Barnett, 1963: Cytochemistry and electron microscopy. J. Cell Biol.17, 19–58.Google Scholar