Uniting of cells and filament formation of binary fission type species in Trebouxiophyceae

在本研究中，我们研究了双裂变型海藻科植物中细胞的结合和细丝的形成。采用LM、TEM、FE-SEM观察母细胞壁脱落情况。芽胞杆菌的母细胞壁被分裂，但仍粘附在子细胞上。我们观察到芽胞杆菌的细胞在对数期相互结合并形成长丝。多细胞藻类物种的平行出现可能是从细丝形成等过程开始的。

In this study, we investigated uniting of cells and filament formation in binary fission type species in Trebouxiophyceae. We used LM, TEM and FE-SEM to explore mother cell wall exfoliation. The mother cell wall was cleaved but remained adhered to the daughter cell in Stichococcus bacillaris. We observed that cells of S. bacillaris united each other and formed long filaments in log phase. The parallel emergence of multicellular algal species may have begun from processes such as filament formation.