Gabara B (1971) Cytokinesis in pollen mother cells. įurness CA, Rudall PJ, Sampson FB (2002) Evolution of microsporogenesis in angiosperms. įurness CA (2008) Successive microsporogenesis in eudicots, with particular reference to Berberidaceae (Ranunculales). įarr CH (1918) Cell division by furrowing in Magnolia. ĭinis AM, Mesquita JF (1993) The F-actin distribution during microsporogenesis in Magnolia soulangeana Soul. Accessed ĭe Storme N, Geelen D (2013) Cytokinesis in plant male meiosis. Accessed īrown RC, Lemmon BE (1992) Control of division plane in normal and griseofulvin-treated microsporocytes of Magnolia. premeiotic phase to establishment of tetrads. īlackmore S, Barnes SH (1988) Pollen ontogeny in Catananche caerulea L. īaluska F, Menzel D, Barlow PW (2006) Cytokinesis in plant and animal cells: endosomes 'shut the door.’.
#Cell polarity update
ĪPG IV (2016) An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV. These observations may be useful to studies of cytokinetic mechanisms, evolution of microsporogenesis, and phylogenetics of angiosperms.Īlbert B, Raquin C, Prigent M, Nadot S, Brisset F, Yang M, Ressayre A (2011) Successive microsporogenesis affects pollen aperture pattern in the tam mutant of Arabidopsis thaliana. As a result of this unusual cytokinesis, a large central callose mass remains in the mature tetrads. This cytokinesis mode differs from either the centripetal or the centrifugal mode of cytokinesis in microsporogenesis in the vast majority of angiosperms. While cytokinesis occurred centripetally from the two furrows, a central callose wall island (CWI) appeared in the center of the cell and dense assemblies of vesicles and short tubules decorated the cytoplasmic regions between the furrows and the CWI. The second equatorial callose furrow formed after telophase II in a plane perpendicular to the first callose furrow. The first nuclear division occurred along the long axis of the cell and the first callose furrow formed at the equatorial plane of the first nuclear division at the late telophase I stage. The polarized microspore mother cells from late prophase I onward had an elongated cell shape and thickened callose wall areas at the two smaller ends of the cell. denudata was synchronous in prophase I but asynchronous in subsequent nuclear divisions. Here, we report findings from an extensive investigation into male meiosis in Magnolia denudata using a combination of light and electron microscopy methods. However, knowledge about male meiosis in Magnolia is still fragmentary. Magnolia, a basal angiosperm genus important for evolutionary and phylogenetic studies, is known to have male meiotic features not seen in the vast majority of angiosperms.
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