Electron microscopy of vesicular-arbuscualr mycorrhizae of yellow poplar. I. Characterization of endophytic structures by scanning electron stereoscopy.

Vesicular-arbuscular mycorrhizae of yellow poplar (Liriodendron tulipifera L.) were examined by scanning electron microscopy. The morphology and spatial distribution of endophytic structures are illustrated. The use of stereoscopic techniques in conjunction with removal of host cytoplasm permits detection of subtle morphological alterations and progressive deterioration of the fungal component.