title: Investigations of cell morphology and reproduction inMacrochloris radiosaEttl & Gärtner (Stephano-sphaerinia, Chlorophyta) by light- and WUDQVPLVVLRQ electron microscopy.
abstract: Cell division and reproduction of a cultivated strain ofMacrochloris radiosa(Stephanosphaerinia clade) were studied by light- and transmission electron microscopy. Multinucleate cells were frequently observed allowing description of the cell structure and details of the reproduction process. Nuclear staining revealed the position of the multiple polymorphic nuclei between the chloroplast lobes. Ultrastructure of coenocytic cells showed no signs of cleavage of the protoplast in the cytoplasm, although basal bodies were already present within the multinucleate cells. In the further course of the reproduction, biflagellate zoospores were developed that retained their flagella during sporulation. Zoospores were subsequently released from the sporangia.
authors: University of Innsbruck, Institute of Botany, Functional Plant Biology, Sternwartestraße 15, 6020 Innsbruck, Austria.
authors: Andreas
authors: A
authors: Holzinger
authors: University of Innsbruck, Institute of Botany, Plant Evolution and Diversity, Sternwartestraße 15, 6020 Innsbruck, Austria.
authors: Andrea
authors: A
authors: Dablander
authors: University of Innsbruck, Institute of Botany, Plant Evolution and Diversity, Sternwartestraße 15, 6020 Innsbruck, Austria.
authors: Georg
authors: G
authors: Gärtner
keywords: coenocytic green algae; multinuclear cell; reproduction