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Term Definition

Pertaining to sexual reproduction in which mating is possible only through interaction of different mating types.


Pertaining to sexual reproduction that can take place without the interaction of two different mating types.


Single, tubular filament of a fungal (or oomycete) thallus or mycelium; the basic structural unit of a fungus. (Pl. hyphae)

hyphal swelling

Globular swelling that forms at a branch point or within the mycelium. It is by definition (Blackwell 1949) not separated from the coenocytic mycelium by a septum. When separated by a septum and having a thickened inner wall, it is termed a chlamydospore.