Induced Resistance in Solanum lycopersicum by Algal Elicitor Extracted from Sargassum fusiforme

Figure 3

Plant pathogen (S. lycopersicum cv. House Momotaro—B. cinerea) interaction in the presence of algal product (AP) elicitor. Tomato (HM) plants were spray-washed with AP (1%) or H₂O and inoculated with 15 μL of B. cinerea spores (10⁵ spore/mL) 1 day later, and disease development was evaluated daily from the first dpi until the 13th dpi. (a) Average disease severity evaluated 5 dpi. Different letters indicate significant differences at (). (b) Percentages of infected S. lycopersicum leaves and disease symptom severities of the AP- and H₂O-treated plants from 1st until the 14th dpi. Disease severity was quantified in reference to (c). (c) Development of B. cinerea on S. lycopersicum leaves was marked from 0 (if the leaf was not infected) to 5 (if the leaf was fully infected) and this reference was made for this purpose accordingly. Three plants were used in each experiment. Results are the average of three repeated experiments.

(a)

(b)

(c)