C, A basidium before the four nuclei derived from the secondary nucleus of the basidium have passed into the four basidiospores.
They are characterized by their principal spores being produced externally, usually in fours, upon an organ called a basidium.
During the tetrad division in the basidium nuclear reduction occurs.
This conjugate condition is finally brought to a close by the nuclear fusion in the basidium.
When the four spores are full grown they have consumed all the protoplasm in the basidium.
Between the nuclear association and the nuclear fusion in the basidium many thousands of cell generations may be intercalated.
basidium, the characteristic spore-producing organ of the Basidiomycetes.
The sporophyte may be considered to begin at the stage of nuclear association and end with the nuclear reduction in the basidium.
Life-history always very simple, no well-marked alternation of generations; basidium borne directly on the mycelium.
There is also a further reduction in that the basidium is not derived from a teleutospore but is borne directly on the mycelium.
basidium ba·sid·i·um (bə-sĭd'ē-əm)
n. pl. ba·sid·i·a (-ē-ə)
A small club-shaped structure typically bearing four spores at the tips of minute projections, unique to Basidiomycetes and used as a distinguishing characterisitic.