Though the prolificacy of spore production might seem to ensure success to a potential pathogen, the pathogen must avoid being dislodged by wind and rain before germination and penetration into a host. Therefore, adhesion of spores and germ tubes is a critical stage in the pre-infection process. The conidia of Magnaporthe grisea, causal agent of the rice blast disease, adhere to surfaces as shown by their inability to be flushed off soon after their deposition on a Teflon film that resembles the rice leaf in some properties (Hamer et al., 1988). Electron microscopic examination shows the periplasmic space of the dry conidium contains mucilage at the tip that is rapidly released upon hydration that could allow the attachment of conidia to a hydrophobic surface.
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