Das Rhizoid vonUlothrix zonata (Chlorophyceae)

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1977 German Publisher:Springer Science and Business Media LLCJournal:Plant Systematics and Evolution, volume 128, pages 71-78 (issn: 0378-2697, eissn: 1615-6110,

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Authors: Lothar Geitler;

doi: 10.1007/bf00985172

Das Rhizoid vonUlothrix zonata (Chlorophyceae)

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Abstract

Ulothrix zonata was studied under natural conditions in situ on slides exposed in a river. On them specimens grow in all stages of development. Older filaments are fixed on the substrate not only by the pointed basal cell but mainly by a branched, horizontally expanded rhizoid produced by this cell. The rhizoid grows in correlation with the growth of the filament as a whole. In addition to the basal cell the following cells of the lower portions of the filament are incapable of division and reproduction. Through these cells the upper fully vital cell grows downwards in older stages.

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University of Vienna
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