Mitosis and Cytokinesis in Funaria are Accompanied by Inward Current Localized at the Nuclear Zone
A trigger for cell division in a wide variety of systems has been postulated to result from ionic fluxes (particularly Ca2+) across the plasma membrane. Furthermore, it has been proposed that control of the different stages of mitosis (in particular the metaphase/anaphase transition) may be regulated by spatially localized increases in intracellular Ca2+ concentration ([Ca2+]i) that are controlled by an endomembrane system (Wolniak and Hepler, 1983). Calcium has also been implicated in the regulation of the cytokinetic apparatus in plant cells (see Gunning, 1982). In an attempt to elucidate the role of ion currents in mitosis and cytokinesis I investigated temporal and spatial localization of ion fluxes across the plasma membrane of dividing tip-growing filamentous Funaria hygrometrica cells.
KeywordsNuclear Region Cross Wall Endomembrane System Platinum Black Nuclear Envelope Breakdown
- Gunning, B. E. S., 1982, The cytokinetic apparatus: Its development and spatial regulation in: “The Cytoskeleton in Plant Growth and Development,” C. L. Lloyd, ed., Academic Press, London.Google Scholar