THE MORPHOLOGY AND DISTRIBUTION OF PITS IN THE CELL WALLS OF SPHAGNUM

Abstract

  A scanning electron microsope study revealed the presence of pits on the inner surface of many cell walls in two Sphagnum species. The pit membranes contained perforations which have been interpreted as plasmodesmatal channels. Further observations suggest that certain pores present in large, dead hyaline cells may be the remains of similar pits which became ruptured at or near the time of cell death.