Fig. 3

Analysis by scanning electron microscopy (SEM) of Pichia pastoris GS115 (control) and P. pastoris CL2 cells induced by cold-shock and after the entire treatment. a Control cells of P. pastoris GS115 at 12 h in stage IV. b P. pastoris CL2 at 12 h during stage IV. In both photographs phosphate salt crystals are observed surrounding cells. Bar 1 µm