Summary
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1.
“Giant”, non-divinding cells of Chlorella are produced when synchronous cultures of the Emerson strain are maintained under heterotrophic conditions.
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2.
The ultrastructural changes accompanying recovery of cell division when the ⇌giant” cells are returned to autotrophic conditions have been studied.
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3.
The pattern of cell division is similar to that of autotrophically-grown cultures but with some special features, not hitherto recorded, which are probably related to the abnormally large number of autospores produced from each “giant” cell.
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4.
The special features are associated with nuclear division, cell-plate formation and cell wall synthesis.
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5.
The investigations show that the blockage of cell division under heterotrophic conditions does not involve a major disruption of the machinery for cell division, which can be reactivated to give normally-functioning autospores following transfer of the “giant” cells to autotrophic conditions.
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Van Thinh, L., Griffiths, D.J. Ultrastructural changes accompanying the recovery of “giant” cells of the Emerson strain of Chlorella. Archiv. Mikrobiol. 87, 47–60 (1972). https://doi.org/10.1007/BF00424778
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DOI: https://doi.org/10.1007/BF00424778