Figure 8 .

A model for light-dependent induction of conidiation in A. nidulans. Light is detected by the photoreceptor complex, which in turn activates the expression of the fluffy genes flbA and flbC. They are both involved in the light-dependent expression of flbB. In addition, flbA and flbC regulate fluG expression, which creates a feedback loop. The fluffy genes flbA–C are essential for the light-dependent induction of brlA expression. The photoreceptor complex may also interact directly with brlA. The resulting activation of brlA by light activates a regulatory cascade that results in the activation of the developmental program of conidiation.