Cytomixis in pollen mother cells of alopecurus arundinaceus poir.

Cytomixis in Pollen Mother Cells of Citrus Genotypes

A microsporogenesis analysis performed in several Citrus populations revealed the presence of cytomixis (i.e., chromatin migration between meiocytes) in pollen mother cells of diploid and tetraploid genotypes. Single and double chromatin bridges between adjacent meiocytes were mainly observed at prophase I, but also in the subsequent phases of first division and in the second meiotic division. ...

An Apparent Helical Arrangement of Ribosomes in Developing Pollen Mother Cells of Ipomoea Purpurea (l.) Roth

Behnke (1963) has recently described a helical arrangement of ribosomes in differentiating cells of the small intestine of the rat fetus, and Waddington and Perry (1963) have found the same structures in the muscle cells of Rana pipiens embryo. In the course of an investigation into the development of pollen in Ipomoea purpurea (L.) Roth, a similar arrangement of ribosomes has been seen in the ...

Running head: Gene Expression Profiling of Pollen Mother Cells in Rice

Meiosis in the Pollen Mother Cells of OENOTHERA BIENNIS and OENOTHERA BIENNIS SULFUREA.

TABLE OF CONTENTS PAGE 1NTRODUCTlON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Description.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Early prophase stages. . . . . . . . . . . . . . . . . . . . . . . . . . ....

Spindle membrane in meiosis of pollen mother cells of Tradescantia and in mitosis of endosperm cells of Zephyranthes.

In the previous paper (Wada, Nagao and Awasawa 1963), we have demonstrated the presence of spindle membrane in fixed preparations of root tip cells in Vicia faba and Allium cepa. These materials are most familiar in the laboratory for observations of mitosis in somatic cells and their mitotic figures are described in text-books of cytology as a standard type of somatic cell division. In this pa...