Title: The biology of Stentor
Identifier: biologyofstentor00tart (find matches)
Year: 1961 (1960s)
Authors: Tartar, Vance, 1911-
Subjects: Stentor
Publisher: New York, Pergammon Press
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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3o8 THE BIOLOGY OF STENTOR is to be found in the work of Popoff (1909) who concluded from his observations of coeruleus that stentors with too little nucleus are sickly and in many respects like enucleates. Schwartz (1935) was even stronger in his statement that digestion and even the entire metabolism" is greatly disturbed through removal of most of the macronucleus. Although the old concept of nucleo-cytoplasmic ratio may not have fulfilled the original hopes that were invested in it, it is likely that the extreme variations in this ratio which can be produced in Stentor will have an important bearing in newer studies of respira- tion, synthesis, and enzyme production in single cells.
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Fig. 87. Critical time for recovery after renucleation. Macronucleus was excised from specimens on morning of day I. If renucleated on day 4 complete regeneration of feeding organelles and of nuclear chain occurred, with continued survival. Renucleated on day 5, pale and murky stentor becomes healthier, regenerates faded pigmentation, and forms primor- dium which does not produce mouthparts. Specimen was dead on day 10. Renucleation on day 6, the faded, murky specimen became healthier in appearance and darker in color but died the next day without forming an oral anlage. Fifth day therefore seems to be transition period for recoverability of the cytoplasm.

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