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Microtubule dynamics during preprophase and prophase in plant cell mitosis, modified from Donukshe et al.[1] The images follow a tobacco BY-2 cell through the first stages of mitosis (c. 12 minutes). The growing ends of microtubules are shown in green (labeled with green fluorescent protein fused to the microtubule plus end binding protein EB1 of Arabidopsis thaliana). N = Nucleus, V = Vacuole, PPB = Preprophase band, MTN = Microtubule nucleation starts at the nuclear envelope, NEB = Nuclear envelope breakdown at the onset of prometaphase. Also see the movie corresponding to this figure.
Preprophase is an additional phase during mitosis in plant cells that does not occur in other eukaryotes such as animals or fungi. It precedes prophase and is characterized by two distinct events:
The formation of the preprophase band, a dense microtubule ring underneath the plasma membrane.
The initiation of microtubule nucleation at the nuclear envelope.
^Dhonukshe, P, Mathur, J, Hülskamp, M, Gadella, TWJ (2005). "Microtubule plus-ends reveal essential links between intracellular polarization and localized modulation of endocytosis during division-plane establishment in plant cells". BMC Biology. 3: 11. doi:10.1186/1741-7007-3-11. PMC 1087477. PMID 15831100.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Preprophase is an additional phase during mitosis in plant cells that does not occur in other eukaryotes such as animals or fungi. It precedes prophase...
Another notable difference is preprophase, an additional step in plant mitosis that results in formation of the preprophase band, a structure composed of...
The preprophase band is a microtubule array found in plant cells that are about to undergo cell division and enter the preprophase stage of the plant cell...
of one set of activities and the start of the next. These stages are preprophase (specific to plant cells), prophase, prometaphase, metaphase, anaphase...
checkpoint in interphase, the cell proceeds to prophase, or in plants to preprophase, which is the first stage of mitosis. G0 phase is viewed as either an...
During this phase microtubules begin to reorganize to form a spindle (preprophase). Before proceeding to mitotic phase, cells must be checked at the G2...
the parent cell wall exactly at the position formerly occupied by the preprophase band. The microtubules and actin filaments within the phragmoplast serve...
phragmosome and the future division plane just below the plasma membrane. This preprophase band marks the equatorial plane of the future mitotic spindle as well...
at the University of Cambridge from 1972–89, who first discovered the preprophase band in 1966 Michael Nyman, composer and musicologist Dr Christopher...
the chloroplast, the pyrenoid actually starts dividing first during preprophase and then the entire chloroplast finally divides during cytokinesis. In...
located at the surface of cells start to retreat in. This causes the preprophase nucleus to migrate toward retreating basal body complex, around which...
structures. Plastidial division occurs prior to flagellar division in preprophase, and both nucleomorph and chloroplast division occur once per Guillardia...
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