Rac Homologues and Compartmentalized Phosphatidylinositol 4, 5-Bisphosphate Act in a Common Pathway to Regulate Polar Pollen Tube Growth

@article{Kost1999RacHA,
  title={Rac Homologues and Compartmentalized Phosphatidylinositol 4, 5-Bisphosphate Act in a Common Pathway to Regulate Polar Pollen Tube Growth },
  author={Benedikt Kost and Emmanuel Lemichez and Pius Spielhofer and Yan Hong and Kimberly Tolias and Christopher L. Carpenter and Nam-Hai Chua},
  journal={The Journal of Cell Biology},
  year={1999},
  volume={145},
  pages={317 - 330}
}
Pollen tube cells elongate based on actin- dependent targeted secretion at the tip. Rho family small GTPases have been implicated in the regulation of related processes in animal and yeast cells. We have functionally characterized Rac type Rho family proteins that are expressed in growing pollen tubes. Expression of dominant negative Rac inhibited pollen tube elongation, whereas expression of constitutive active Rac induced depolarized growth. Pollen tube Rac was found to accumulate at the tip… CONTINUE READING
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