FIGURE 6:

Upstream pathways of Flo8 in CO₂ sensing and morphogenesis regulation. The adenylyl cyclase Cyr1 (cAMP) was not required for Flo8-induced filamentous growth. The cells were grown on Lee's plus glucose agar with or without 50 μg/ml doxycycline. The plates were incubated in air or in 5% CO₂ at 37°C for 5 d before acquiring the images. The cellular phenotypes of a representative colony under each culture condition are also shown.