Some ultrastructural features ofPlanctomyces bekefii, morphotype I of theBlastocaulis-Planctomyces group of budding and appendaged bacteria

  title={Some ultrastructural features ofPlanctomyces bekefii, morphotype I of theBlastocaulis-Planctomyces group of budding and appendaged bacteria},
  author={Jean M. Schmidt and Mortimer P. Starr},
  journal={Current Microbiology},
The ultrastructure ofPlanctomyces bekefii, a budding and appendaged bacterium, has been examined using samples obtained directly from pond water, its natural habitat. The prokaryotic nature of this morphologically unusual microbe was verified by observations of thin sections. Its major appendage, the nonprosthecate stalk, is shown to have a tubular structure, with a substructure of hollow fibers. Some details of the budding process and other ultrastructural features are presented. 

History, Classification and Cultivation of the Planctomycetes

The history of the planctomycetes is traced from their initial discovery as planktonic microcolonies in lake water, to their recognition as an evolutionarily diverse phylum encompassing three classes with a vast array of unique and unusual features.

Life cycle of a budding and appendaged bacterium belonging to morphotype IV of theBlastocaulis-Planctomyces group

Transmission electron microscopy was employed to determine ultrastructural details regarding the single ensheathed flagellum, the polarly distributed crateriform structures and numerous pili, the excreted holdfast, the multifibrillar major appendage (a fascicle), and daughter cell (bud) formation.

Manganese and iron encrustations and other features ofPlanctomyces crassus Hortobágyi 1965, morphotype Ib of theBlastocaulis-Planctomyces group of budding and appendaged bacteria, examined by electron microscopy and X-ray micro-analysis

Water samples collected in August, 1980, from a pond in Budapest, Hungary, have permitted transmission and scanning electron microscopic observations to be made ofPlanctomyces crassus Hortobágyi

Immunoferritin labeling shows de novo synthesis of surface components in buds of a prokaryote belonging to morphotype IV of theBlastocaulis-Planctomyces group

Indirect immunoferritin labeling provided evidence for the de novo synthesis of antigenic cell-surface components of the daughter cell (bud) of a freshwater isolate belonging to morphotype IV of

Metallic-Oxide encrustations of the nonprosthecate stalks of naturally occurring populations ofPlanctomyces bekefii

Naturally occurring metallic-oxide encrustations of the multifibrillar stalks of morphotype Ia of the Blastocaulis-Planctomyces group of budding and nonprosthecately appendaged prokaryotes from two sources-a pond in Budapest, Hungary and Gebharts Teich, a fishpond in Austria-are examined by energy-dispersive X-ray spectroscopy.

Cell Compartmentalization and Endocytosis in Planctomycetes: Structure and Function in Complex Bacteria

Planctomycetes are unique among the domain Bacteria in possessing cells with a complex plan defined by internal membranes forming separated compartments within the cell. They also possess other

Phylum-targeted pyrosequencing reveals diverse planctomycete populations in a eutrophic lake

The results of this study suggest that phylum-targeted pyrosequencing is a useful tool for better describing the diversity of bacterial sub-populations, and could be employed for future testing of hypotheses regarding spatial and temporal differences in planctomycete diversity and abundance.

Manganese-oxidizing bacteria and particle manganese in Lake Fukami-ike

Manganese-oxidizing bacteria is a generic name for microorganisms with the ability to oxidize dissolved manganese to the insoluble manganic form on or in capsules (GHIORSE 1984). Aggregated

Phylum XXV. Planctomycetes Garrity and Holt 2001, 137 emend. Ward (this volume)

The phylum Planctomycetes was circumscribed for this volume on the basis of phylogenetic analysis of 16S rRNA gene sequences; the phylum contains the class Planctomycetia.



Morphological diversity of freshwater bacteria belonging to theBlastocaulis-planctomyces group as observed in natural populations and enrichments

The nonprosthecate, stalked, budding, aquatic bacteria presently thought to belong to theBlastocaulis-Planctomyces group are morphologically quite diverse—as can be seen in high resolution

Isolation and ultrastructure of freshwater strains ofPlanctomyces

Four strains of a freshwaterPlanctomyces species—different in a number of respects from those hitherto described—have been isolated and their morphology and ultrastructure examined by transmission

Re-evaluation of Pasteuria ramosa Metchnikoff 1888, a Bacterium Pathogenic for Daphnia Species

Recent examination of Daphnia spp. collected from Lake Erie and several locations in southern Michigan, U.S.A., revealed the presence of structures that resembled those described by Metchnikoff in

The Blastocaulis-Planctomyces Group of Budding and Appendaged Bacteria

The entire assemblage of these interesting budding and appendaged bacteria with prominent acellular (nonprosthecate) appendages are referred to as the “Blastocaulis-Planctomyces group” to avoid unwarranted taxonomic implications.

Morphotype V of theBlastocaulis-Planctomyces group of budding and appendaged bacteria:Planctomyces guttaeformis Hortobágyi (sensu Hajdu)

The ultrastructure of a budding and appendaged bacterium resemblingPlanctomyces guttaeformis Hortobágyi (sensu Hajdu) was examined by transmission electron microscopy in negative-contrast and

Corniculate Cell surface protrusions in morphotype II of theBlastocaulis-Planctomyces group of budding and appendaged bacteria

Natural water samples and dilute-peptone enrichment cultures, containing budding and appendaged bacteria assigned to morphotype II of the Blastocaulis-Planctomyces group of nonprosthecately stalked prokaryotes, have been examined by transmission electron microscopy, finding unusual corniculate structures that protruded at seemingly the same loci.

Two Identical Genera of Budding and Stalked Bacteria: Planctomyces Gimesi 1924 and Blastocaulis Henrici and Johnson 1935

A comparison of the characteristics of the organisms considers Blastocaulis spaerica Henrici and Johnson 1935 and Planctomyces bekefii Gimesi 1924 to be identical, which means that both organisms occur in the same habitat and at the same time.

Current sightings, at the respective type localities and elsewhere, ofPlanctomyces bekefii Gimesi 1924 andBlastocaulis sphaerica Henrici and Johnson 1935

AlthoughPlanctomyces bekefii was originally described as a fungus, both organisms are seen by transmission electron microscopy to be budding and nonprosthecately appendaged prokaryotes, insofar as identity can be demonstrated for such presently noncultivable bacteria solely by microscopic observations.

Septum Formation in Escherichia coli: Characterization of Septal Structure and the Effects of Antibiotics on Cell Division

Bulge formation, due to the presumed action of an autolysin(s), may be an initial step in the septation sequence when the mucopeptide is modified to allow construction of the sePTum.

Bergey's Manual of Determinative Bacteriology

Much of the older work in bacteriology of uncritical systematic work has now lost its value and should be reconsidered in the light of modern findings.