ABSTRACT
Molecular communications between plant and pathogen commence almost immediately after
the pathogen makes contact with the plant surface (Fujita et al., 2004). On perception of the
plant signals, the pathogen prepares to invade the host tissues by using their various toxic
weapons. On the other hand, plants perceive the pathogen signals (Fliegmann et al., 2004;
Huang et al., 2005) and prepare to defend themselves by producing several antimicrobial
compounds to ward off the pathogens (Mengiste et al., 2003). In this battle, susceptibility or
resistance is determined by the winner; if the pathogen is able to overcome the toxic envir-
onment in the plant tissue, the disease develops and if the plant is able to ward off the
pathogen’s toxic weapons, disease resistance develops.
