Figure 1.

Wild-type and mutant morphologies. (A) Germination of wild-type conidia. Conidia from a wild-type strain were plated on minimal agar medium, incubated at 30°C, and photographed at various times. (B) Identification of hyphal morphogenesis mutants on the basis of abnormal colony morphology (see MATERIAL AND METHODS for details). (C) Characterization of mutants based on the morphological alterations observed when hyphae or conidia were transferred to restrictive temperature. Bars, 20 μm (A and C) and 500 μm (B).