Figure 1.

Scanning electron micrographs of developing wild-type and cellulose-deficient strains. (A) Developing fruiting body of the wild type after 18 hr of development. Note the well-defined stalk and basal disk. (B) Developing fruiting body of the cellulose-deficient strain DG1099 after 18 hr of development. Note the absence of a stalk or basal disk. The apical-most mass is similar in appearance to the cell mass in A. The multiple lobes seen here are characteristic of the mutant strains, giving them the appearance of snowmen. (Bar = 50 μm.)