NUCLEAR STREAMING IN GELASINOSPORA

Abstract

Under some conditions, large numbers of nuclei of Gelasinospora tetrasperma travel through the mycelium for long distances, passing from one cell into the next via the septal pore. They are carried by the streaming cytoplasm at speeds as high as 40 mm. per hour. Under other conditions, the moving cytoplasm leaves all the nuclei behind, fixed in the thin cytoplasmic lining of the cell wall. Nuclei have been observed to stream in certain mated homokaryons but not in unmated ones. A mechanism for nuclear streaming is suggested.