Ultrastructural basis of sclerotial survival in soil.
The ultrastructure of developing and mature sclerotia ofSclerotium rolfsii was studied with a scanning electron microscope. The mature sclerotium is disconnected from the mycelium and well differentiated. The rind is composed of rather thick-walled empty cells. The cortex cells are large and almost completely filled with vesicles, whereas the medullar cells are smaller and some of them are very thickwalled.
Department of Plant Pathology and Microbiology, The Hebrew University, Faculty of Agriculture, Rehovot, Israel.
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