title: An ultrastructural survey of the genus Prototheca with special reference to plastids.
abstract: An ultrastructural investigation of six different species of Prototheca showed that all of them contained starch grains enclosed in double-membrane-bounded structures recognized as plastids. It is concluded that these unicellular species of Prototheca must be considered as non-photosynthetic algae.
authors.affiliation: Department of Biological Sciences, Illinois State University, 61761, Normal, Illinois, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Nadakavukaren
authors.affiliation: Department of Biological Sciences, Illinois State University, 61761, Normal, Illinois, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: McCracken
keywords: Colorless alga; Electron microscopy; Plastids; Prototheca