Scanning electron microscopy of syncytial transfer cells induced in roots by cyst-nematodes

Abstract

Syncytia induced by cyst-nematodes form by wall dissolution and fusion of cell protoplasts. The patterns and extent of wall perforations of syncytia induced in soybean by Heterodera glycines and in tobacco by Heterodera tabacum were examined by scanning electron microscopy after removal of the cytoplasm. Wall perforations appear to form at sites formerly occupied by pit fields. The origin and control of enzymes responsible for dissolving the walls to form these perforations are discussed. It is concluded that these enzymes are of plant origin