Figure 4: Effects of glucose and sucrose on lesion expansion and fungal growth of B. cinerea. To mimic sugar exudation from mesophyll cells, the fungal spores were suspended in 20 mM or 40 mM of glucose (Glu) or sucrose (Suc) solutions. (a) Images of tomato cotyledons infected with B. cinerea spores suspended in 20 mM and 40 mM glucose and sucrose solutions 48 h post inoculation. DW, cotyledons inoculated with distilled water-suspended spores. (b) Images of cotyledons were digitally scanned and the lesion areas were measured. (c) The biomass of B. cinerea was measured using qPCR 48 h post inoculation. 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<0.05; **, P<0.01).