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Mitochondria and plastids multiply by division in eukaryotic cells. Recently, the eukaryotic homolog of the bacterial cell division protein FtsZ was identified and shown to play an important role in the organelle division process inside the inner membrane. To explore the evolution of FtsZ proteins, and to accumulate data on the protein import system in mitochondria and plastids of the red algal lineage,...
The cyanelles of glaucocystophytes are probably the most primitive of known extant plastids and the closest to cyanobacteria. Their kidney shape and FtsZ arc during the early stage of division define cyanelle division. In order to deepen and expand earlier results (Planta 227:177–187, 2007), cells of Cyanophora paradoxa were fixed with two different chemical and two different freeze-fixation methods...
Cyanelles of the biflagellate protist Cyanophora paradoxa have retained the peptidoglycan layer, which is critical for division, as indicated by the inhibitory effects of β-lactam antibiotics. An FtsZ ring is formed at the division site during cyanelle division. We used immunofluorescence microscopy to observe the process of FtsZ ring formation, which is expected to lead cyanelle division, and demonstrated...
Non-flagellated vegetative green algae of the Trebouxiophyceae propagate mainly by autosporulation. In this manner, the mother cell wall is shed following division of the protoplast in each round of cell division. Binary fission type Nannochloris and budding type Marvania are also included in the Trebouxiophyceae. Phylogenetic trees based on the actin sequences of Trebouxiophyceae members revealed...
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