 When "D. caudata" was fed "M. rubrum" reddish-brown plastids, these were not digested in a food vacuole, rather they were transported to the periphery of the cell to join the rest of the plastids.The plastids that were ingested are surrounded by membrane vesicles and transferred to the cytoplasm.During plastid sequestration, the plastids see a change in morphology, the thylakoids of "M. rubrum" plastids become irregular and distended.