Struktur, Wachstum und Teilung der Körperhülle bei den Eugleninen

Pochmann, Alfred

doi:10.1007/bf01991689

Cited by 30 publications

(2 citation statements)

References 39 publications

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“…Evidence is presented in this report that this duplication appears to take place by growth of new strips between old ones rather than by any form of lateral division of existing strips. An early suggestion of intercalary strip growth was made by Pochmann (33), although details of Pochmann's model are not consistent with current evidence. Duplication presumably begins in the anterior "mouth" or cytostome region, as in Astasia (41,42), and progresses posteriorly.…”

Section: Surface Replicationmentioning

confidence: 59%

Immunological and structural evidence for patterned intussusceptive surface growth in a unicellular organism. A postulated role for submembranous proteins and microtubules.

Hofmann¹,

Bouck²

1976

The Journal of Cell Biology

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The surface complex of Euglena has been examined intact and after isolation and purification by the use of mild sonication to disrupt cells. In intact cells the surface complex (pellicle complex) is oriented in a series of parallel ridges and grooves, and possesses among other components a characteristic group of four to seven microtubules. Isolated pellicles retain the ridge and groove pattern but no microtubules are present. Isolates yielded at least three major polypeptides on SDS acrylamide gels; one or more of the polypeptides are postulated to be identical with a submembrane layer present in both intact and isolated pellicles; one polypeptide appears to be in or on the surface membrane. Antibodies directed against the isolated pellicles were conjugated directly or indirectly to fluorescein, latex spheres, or ferritin. In appropriate experiments with these antibody conjugates, it has been found that antigenic sites are immobile and that new antigenic sites (daughter strips) are inserted between parental strips in replicating cells. These results together with direct observation of daughter strips by transmission electron microscopy suggest that surface growth in Euglena occurs by intussusception.

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