Play narration:

CHARACTERISTICS OF FUNGI: SPORES

Spores typically function as a means of reproduction and dispersal for a fungus. They can also serve as a means of survival during periods of unfavorable environmental conditions. The spores (called oospores) in this photo (see arrow) are those of a common root rot fungus called Pythium. Note that these spores have very thick walls that help prevent loss of water, and serve as a barrier to prevent attack by other microorganisms. Spores of this type have been reported to survive for 40 years in soil.