| Noun | 1. | genus Plasmodiophora - type genus of Plasmodiophoraceae comprising minute plant parasitic fungi similar to and sometimes included among the slime molds fungus genus - includes lichen genera family Plasmodiophoraceae, Plasmodiophoraceae - family of fungi often causing hypertrophy in seed plants clubroot fungus, Plasmodiophora brassicae - a fungus resembling slime mold that causes swellings or distortions of the roots of cabbages and related plants |