Patterns of amyloplast distribution during microsporogenesis in Tradescantia, Impatiens and Larix

During the meiotic prophase I in Tradescantia and Impatiens microsporocyte becomes temporarily asymmetric, with excentrically situated nucleus and all amyloplasts gathered in a dense group close to the nuclear envelope.. Further microsporogenesis in Impatiens differs in amyloplast distribution from that in Tradescantia and Larix. In Impatiens at the telophase I amyloplasts are assembled in a dense equatorial plate. At the late telophase II this plate reshapes and separates a meiocyte into four areas (a tetrad) until cell plates are formed in simultaneous cytokinesis. Similar assemblages of amyloplasts do not occur in telophase meiocytes of Tradescantia and Larix where cytokinesis is of a successive type