Behavior of Vacuoles during Microspore and Pollen Development in Arabidopsis thaliana

Arabinogalactan Proteins in Arabidopsis thaliana Pollen Development

The Arabidopsis thaliana gametophytic mutation gemini pollen1 disrupts microspore polarity, division asymmetry and pollen cell fate.

Pollen development and male gametogenesis are critically dependent upon cell polarization leading to a highly asymmetric cell division termed pollen mitosis I. A mutational approach was adopted in Arabidopsis thaliana to identify genes involved these processes. Four independent gemini pollen mutants were isolated which produce divided or twin-celled pollen. The gemini pollen1 mutant was charact...

Female Gametophyte Development and Pollen Tube Guidance in Arabidopsis thaliana

1 Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, 606-8502 Japan 2 Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, Zurich, CH-8008, Switzerland 3 Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore 117604 4 Department of Biological Mechanisms and Functions, Graduate School o...

sidecar pollen, an Arabidopsis thaliana male gametophytic mutant with aberrant cell divisions during pollen development.

During pollen development each product of meiosis undergoes a stereotypical pattern of cell divisions to give rise to a three-celled gametophyte, the pollen grain. First an asymmetric mitosis generates a larger vegetative cell and a smaller generative cell, then the generative cell undergoes a second mitosis to give rise to two sperm cells. It is unknown how this pattern of cell divisions is co...

Formation of unreduced pollen in Arabidopsis thaliana.

Sexual polyploidization, as a result of 2n gamete formation, is thought to be the main process involved in the origin of polyploid plants (Bretagnolle & Thompson, 1995). These gametes, possessing the somatic rather than the gametophytic chromosome number, can be formed either during microsporogenesis (2n pollen, big pollen, diplandroidy) or megasporogenesis (2n eggs, diplogynoecy). In general, ...