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dc.contributor.authorCoss, RA
dc.contributor.authorPickett-Heaps, JD
dc.date.accessioned2020-12-21T01:53:11Z
dc.date.available2020-12-21T01:53:11Z
dc.date.issued1974-10
dc.identifier.citationCoss, R. A. & Pickett-Heaps, J. D. (1974). The effects of isopropyl N-phenyl carbamate on the green alga Oedogonium cardiacum. I. Cell division.. J Cell Biol, 63 (1), pp.84-98. https://doi.org/10.1083/jcb.63.1.84.
dc.identifier.issn0021-9525
dc.identifier.urihttp://hdl.handle.net/11343/256700
dc.description.abstractCell division in vegetative filaments of the green alga Oedogonium cardiacum is presented as an experimental system. We report on how we have used this system to study the effects of isopropyl N-phenylcarbamate (IPC) on the mitotic apparatus and on the phycoplast, a planar array of cytokinetic microtubules. Polymerization of microtubules was prevented when filaments, synchronized by a light/dark regime and chilled (2 degrees C) while in metaphase or just before phycoplast formation, were exposed to 5.5 x 10(-4) M IPC and then returned to room temperature. Spindles reformed or phycoplasts formed when these filaments were transferred to growth medium free of IPC. However, the orientation of both microtubular systems was disturbed: the mitotic apparatus often contained three poles, frequently forming three daughter nuclei upon karyokinesis; the phycoplast was often stellate rather than planar, and it sometimes was displaced to the side of both daughter nuclei, resulting in a binucleate and an anucleate cell upon cytokinesis. Our results suggest that IPC (a) prevents the assembly of microtubules, (b) increases the number of functional polar bodies, and (c) affects the orientation of microtubules in O. cardiacum. High voltage (1,000 kV) electron microscopy of 0.5-microm thick sections allowed us to visualize the polar structures, which were not discernible in thin sections.
dc.languageeng
dc.publisherRockefeller University Press
dc.titleThe effects of isopropyl N-phenyl carbamate on the green alga Oedogonium cardiacum. I. Cell division.
dc.typeJournal Article
dc.identifier.doi10.1083/jcb.63.1.84
melbourne.affiliation.departmentSchool of BioSciences
melbourne.source.titleThe Journal of Cell Biology
melbourne.source.volume63
melbourne.source.issue1
melbourne.source.pages84-98
dc.rights.licenseCC BY-NC-SA
melbourne.elementsid1228846
melbourne.openaccess.pmchttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2109331
melbourne.contributor.authorPickett-Heaps, Jeremy
dc.identifier.eissn1540-8140
melbourne.accessrightsOpen Access


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