Fig. 2.

Disruption of Cdc42 dynamics or deletion of the Bni1 formin attenuate hyphal thigmotropism. Hyphal growth of adhered cells was induced on quartz slides with 0.79-µm ridges. The Cdc42 mutants’ growth medium was supplemented with 2% glucose or 2% sorbitol to repress or induce expression of the heterologous copy of CDC42, respectively. The number of hypha–ridge interactions resulting in tip reorientation was expressed as a percentage of total interactions. P values are shown above the relevant bars. Error bars indicate SD, n = 3 (>100 hypha–ridge interactions per strain per experiment).