Spindle Membrane in Meiosis of Pollen Mother Cells of Tradescantia and in Mitosis of Endosperm Cells of Zephyranthes

Abstract

1. The nuclear origin of karyokinetic spindle and the presence of spindle membrane have been demonstrated in pollen mother cells of Tradescantia reflexa and in endosperm cells of Zephyranthes candida by using the fixative which contains CdCl₂ solution.
2. Polar caps in root tip cells, multipolar spindles in pollen mother cells and a clear zone in endosperm cells have been discussed on their common characters.
3. It can be given as a conclusion that the nuclear origin of karyokinetic spindle and the presence of spindle membrane are common to all the mitoses in higher and lower plants.