The Genetic Control of Cell Surfaces

Beale, G. H.

doi:10.1016/b978-1-4831-9996-2.50011-0

Cited by 3 publications

(1 citation statement)

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“…In addition, there are the phenomena of mating type interactions and serotypes (for summaries see Preer, 1957a;1957bBeale, 1959Beale, , 1964, both of which are closely related to cortical function. While a great deal is known genetically about these properties of ciliates, the mechanisms of serotypic and mating type interactions are little understood.…”

Section: Introductionmentioning

confidence: 99%

CORTICAL ULTRASTRUCTURE OF PARAMECIUM AURELIA

Hufnagel

1969

The Journal of Cell Biology

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Two methods have been devised for the isolation of large quantities of purified pellicles (cortical layers) of Paramecium aurelia. Pellicles isolated by both procedures, when examined by electron microscopy, were found to contain ciliary basal bodies, two types of cortical membranes, ribbons of microtubules, kinetodesmal fibers, and elements of the infraciliary lattice system. By electron microscopy, the extent of preservation of the various cortical structures when pellicles are isolated by each method has been characterized.Pellicles isolated in both ways have been utilized to investigate cortical morphology of Paramecium. Both phase-contrast and electron microscopic observations have been made. Many new ultrastructural features were observed and are reported herein.An interesting result of this study is the discovery in stock CD that the structure of cortical territories (the territory is the functional unit of cortical morphogenesis and physiology) may vary within a single organism. Features which show variation include number of parasomal sacs, microtubular ribbons, and basal bodies (and therefore cilia) per territory, number of microtubules per ribbon, and length of kinetodesmal fibers. The possible significance of these variations, with respect to territory replication, is discussed.In addition, preliminary observations on the solubility of various cortical organelles in the presence of a number of protein-denaturing agents are reported.

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Section: Introductionmentioning

confidence: 99%

CORTICAL ULTRASTRUCTURE OF PARAMECIUM AURELIA

Hufnagel

1969

The Journal of Cell Biology

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Adh�sion von Fortpflanzungszellen Benthontischer Algen

Linskens¹

1966

Planta

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The paper describes the adhesion of algal spores to glass surfaces with different degrees of roughness (surface tension, contact angle and adsorption capacity were taken as indices of roughness). It was observed that spores of various species and different types can be devided into two classes based on the manner in which they attach themselves to glass surfaces: the first type prefers smooth surfaces, and the second type prefers rough surfaces. Changes in the attaching property of the cell are associated with zygote formation - e.g. gametes of Acetabularia belong to the first type and mature zygotes to the second one. In green, brown and red algae both reaction types are observed in mobile and immobile cells. The adhesion process is temperature independent between 13 and 23°C. An influence of surface active compounds on the attachment process was observed; it was found that for example a Silicon film on the glass surface cancels differences in the attaching properties.The observations are believed to give some information on the surface properties of free-living unicellular stages of algae. These are discussed in connection with structural changes in the reacting surfaces during the pairing process and in connection with the first step in the settlement of epiphytic algae and the production of underwater fouling.

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