ABSTRACT
Spores formed in the infected host, have to be liberated (take off), travelled (the flight) and deposited (landing) on the suitable host to continue its infectious life cycle. Spore liberation is a physical process by which the spores produced are released from the fruiting bodies. Squirt gun mechanisms are responsible for launching spores at the highest speeds, pressurized by osmosis and are most common in the Ascomycota, including lichenized species, but have also evolved among the Zygomycota. The ascomycetes squirt the ascospores through the ostiole. Buller's drop is generated by condensation of water from the humid air surrounding the spore. Condensation is driven by the presence of free sugars on the spore surface that lower its water potential. The spores of some fungi are dispersed in water or on the surface of water or rain drops. The chemical composition of the cell wall of these spores makes them non wettable and hence they stick on to the raindrops.
