Zoomorphology

, Volume 100, Issue 2, pp 121–130

Ultrastructural characteristics of algal digestion by Climacostomum virens (Ciliata) (Ehrenberg) stein

  • Dorothee Fischer-Defoy
  • Klaus Hausmann
Article

DOI: 10.1007/BF00310358

Cite this article as:
Fischer-Defoy, D. & Hausmann, K. Zoomorphology (1982) 100: 121. doi:10.1007/BF00310358

Summary

Phagocytosis and digestion in Climacostomum virens were investigated using the flagellate Chlorogonium elongatum as food. The flagellates are pushed through the buccal tube to be enclosed in food vacuoles in the cytopharyngeal region at the base of the buccal tube. Cytopharyngeal vesicles contribute membrane to the forming food vacuoles. Within 3–5 min after ingestion, small vesicles, presumably primary lysosomes, surround the food vacuole and fuse with it. Electron-lucent folds develop in the food vacuole membrane 3–6 h after feeding. Electron dense evaginations from the vacuole are detected 9–24 h after ingestion. Folds and evaginations appear to be involved in the resorption and transport of digested material through the cytoplasm. Defecation of undigested residues at the cytoproct occurs 12–24 h after ingestion. The membrane of the defecation vacuole fragments to form numerous vesicles as the undigested residues are discharged.

Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Dorothee Fischer-Defoy
    • 1
  • Klaus Hausmann
    • 1
  1. 1.Department of CytologyUniversity of HeidelbergHeidelbergFederal Republic of Germany