Distinct Nuclear Membrane Research Articles

A STUDY OF DESICCATION IN THE ROTIFER, PHILODINA ROSEOLA, WITH SPECIAL REFERENCE TO CYTOLOGICAL CHANGES ACCOMPANYING DESICCATION

1. The tissues and the parts of the individual cells of a desiccated Philodina roseola maintain their identity during the drying process.2. No protecting membrane is secreted when drying begins or at any other time during the desiccation process. The integument of the dried rotifer is thinner than that of the undried specimen.3. Metabolism goes on slowly in the dry condition as is evidenced by changes in the walls of the digestive tube.4. Desiccation in Philodina may be complete but not absolute without fatal results.5. The typical nucleus in all the tissues of Philodina consists of a single large karyosome surrounded by a clear space with a distinct nuclear membrane at the periphery of the clear space.6. The general effect of desiccation upon the cells of the rotifer tissues is the production of a nuclear-cytoplasmic rearrangement in which the chromatic part of the nucleus migrates to the periphery and the cytoplasm becomes more dense.7. The movement of chromatin during desiccation phenomena takes place ...