Please use this identifier to cite or link to this item:
|Title:||Dynamic F-actin movement is essential for fertilization in Arabidopsis thaliana||Authors:||Kawashima T.
Rho guanine nucleotide binding protein
time lapse imaging
rho GTP-Binding Proteins
|Issue Date:||2014||Citation:||Kawashima T., Maruyama D., Shagirov M., Li J., Hamamura Y., Yelagandula R., Toyama Y., Berger F. (2014). Dynamic F-actin movement is essential for fertilization in Arabidopsis thaliana. eLife 3. ScholarBank@NUS Repository. https://doi.org/10.7554/eLife.04501||Abstract:||In animals, microtubules and centrosomes direct the migration of gamete pronuclei for fertilization. By contrast, flowering plants have lost essential components of the centrosome, raising the question of how flowering plants control gamete nuclei migration during fertilization. Here, we use Arabidopsis thaliana to document a novel mechanism that regulates F-actin dynamics in the female gametes and is essential for fertilization. Live imaging shows that F-actin structures assist the male nucleus during its migration towards the female nucleus. We identify a female gamete-specific Rho-GTPase that regulates F-actin dynamics and further show that actin-myosin interactions are also involved in male gamete nucleus migration. Genetic analyses and imaging indicate that microtubules are dispensable for migration and fusion of male and female gamete nuclei. The innovation of a novel actin-based mechanism of fertilization during plant evolution might account for the complete loss of the centrosome in flowering plants.||Source Title:||eLife||URI:||https://scholarbank.nus.edu.sg/handle/10635/174582||ISSN:||2050-084X||DOI:||10.7554/eLife.04501|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
|10_7554_eLife_04501.pdf||2.75 MB||Adobe PDF|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.