Abstract
Allogromia sp. (strain N.F. Lee) provides a convenient model system for studying intracellular transport. We have been examining ultrastructural changes which occur in the reticulopodial network (RN) and cell body (CB) of Allogromia at various stages in the retraction response stimulated by 0.4M MgCl2 solution. As retraction proceeds, microtubules (MT) disassemble and form areas of regularly packed cytoplasm (TP-tigroid patterning) resembling vinca alkaloid induced paracrystals of tubulin. TP is first seen in the RN, and later in the CB. TP consists of dark filamentous material 12.5 nm in width separated by a light spacing of 8 nm when plane of section gives a perfect repeat pattern (arrow-fig. 6). TP may fill the entire profile of a reticulopod and in early stages of retraction is seen in close juxtaposition to MT. In the CB, TP occurs in patches 0.3-2.0 μm in diameter. TP is seen with great frequency in retracting Allogromia, but also, it can be seen occasionally in animals with fully extended RN.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
