Figure 1.

Induction of filaments and colony formation by the filamentous spent culture of M. harundinacea. (a) A microscope image of the filaments in conditioned medium with spent culture of filamentous cells showing fluorescence at 420 nm, whereas the short cells (insert) show no fluorescence. Bar, 5 μm. (b) Phase-contrast microscopic image of the filaments in conditioned medium with spent culture of filamentous cells and short cells (insert). Bar, 5 μm. (c) Microscope images of colonies forming on conditioned agar medium with spent culture of filamentous cells. The arrows indicate the presence of colonies using a light microscope (upper) and illumination at 420 nm (lower). Bar, 1 mm.