New observations on the life cycle of Asterocapsa divina (Cyanoprokaryota, Chroococcaceae)
Montejano, Gustavo; León-Tejera, Hilda; Hindák, František
The life cycle of Asterocapsa divina Komárek 1993, an aerophytic chroococcal cyanoprokaryote described from calcareous rocks of the central region of Mexico, has been studied in natural populations and also in laboratory cultures. In the life cycle of the species two different phases could be recognized: one corresponding to the arthrocytous stage, i.e. colonies with ornamented sheaths and with cells dividing by binary fission, and the nanocytous stage where cells in colonies suffer multiple fission (sequential binary fission, without growth between each division) and develop numerous nanocytes. The second stage is very rare and occurs mostly in combination with an unidentified species of Scytonema.