Flat bacteria have only rarely been described: in the genera Simonsiella and Alysiella (this Handbook, Chapter 23), the “cells are arranged in apposition to form filaments which are flat, not cylindrical” (Steed-Glaister, 1974). Evidently, the flat shape is constant. Bacteria of the genus Stella (Vasiljeva, 1970) are new examples of flat cells; in natural samples they resemble flat, six-pronged stars (Star of David; Fig. 1). Cell division of the nearly symmetrical organisms begins with a slight elongation in two directions. The cross-wall separates the daughter cells, whose shape is that of two three-pronged crowns. The nearly triangular appendages (prosthe-cae) are also flat, and so the Stella cell has, if seen from the side, a lens shape.
KeywordsFulvic Acid Peat Soil Metal Salt Solution Nitrilo Triacetate Mineral Salt Solution
Unable to display preview. Download preview PDF.
- Hirsch, P., Müller, M., Schlesner, H. 1977. New aquatic budding and prosthecate bacteria and their taxonomic position. Society for Applied Bacteriology Symposium Series 6:107–133.Google Scholar
- Lafitskaya, T. N., Vasiljeva, L. V. 1976. New triangular bacteria. Microbiology [English translation of Mikrobiologiya] 45:701–704.Google Scholar
- Nikitin, D. N., Vasiljeva, L. V., Lokhmacheva, R. A. 1966. New and rare forms of soil microorganisms. Moscow: Isdatelstvo Nauka.Google Scholar
- Steed-Glaister, P. 1974. Simonsiellaceae, pp. 116–118. In: Buchanan, R. E., Gibbons, N. E. (eds.), Bergey’s manual of determinative bacteriology, 8th ed. Baltimore: Williams & Wilkins.Google Scholar
- Vasiljeva, L. V. 1970. A star-shaped soil microorganism. [In Russian.] Isvestiya Akademii Nauk SSSR, Seriya Biologicheskaya 2:308–310.Google Scholar
- Vasiljeva, L. V. 1972. The peculiarities of the ultrastructure and the cycle of development of the bacterium Stella humosa. [In Russian.] Isvestiya Akademii Nauk SSSR, Seriya Biologicheskaya 5:782–788.Google Scholar
- Vasiljeva, L. V., Lafitskaya, T. N., Aleksandrushkina, N. I., Krasilnikova, E. N. 1974. Physiological-biochemical peculiarities of the prosthecobacteria Stella humosa and Prosthecomicrobium sp. [In Russian.] Isvestiya Akademii Nauk SSSR, Seriya Biologicheskaya 5:699–714.Google Scholar