Figure 5: Effects of glucose and sucrose on growth of B. cinerea germ tubes. To investigate the direct effects of sugars on fungal spore growth, spores were suspended into sugar solutions, germ tube lengths were measured on digital images 8 h after incubation. (a) Light microscopies of germ tubes, suspended in distilled water (DW), glucose (Glu) or sucrose (Suc) 8 h after incubation. (b) Germ tube length. Values represent the mean and standard error of triplicate results. Asterisks indicate values that are statistically significantly different from the DW control using ANOVA (**, P<0.01).