result was obtained in the present study; a large amount of the SAdependent
PR gene CHI3 was induced by B. cinerea at 6 hpi (Fig. 5A).
These results suggest that an SA-mediated responsewas induced at
6 hpi in the tomato leaves after inoculation with B. cinerea. It is
noteworthy that induction of the CHI3 gene (1 hpi) in tomato leaves
pretreated with EAWP occurred earlier. Therefore, such a rapid SAmediated
signaling response in tomato leaves pretreated with
EAWP may be essential to suppress the development of gray mold
when the leaves are attacked by B. cinerea. Further studies should
be performed to determine whether this response is also observed
in tomato leaves pretreated with EAWP when biotrophic pathogens
attack them.