Tip growth: signaling in the apical dome

Curr Opin Plant Biol. 2008 Dec;11(6):662-71. doi: 10.1016/j.pbi.2008.10.002. Epub 2008 Oct 30.


Signaling molecules, such as ROP/RAC GTPases and their regulators, reactive oxygen species (ROS) and phospholipids, play pivotal roles in the control of tip growth in pollen tubes and root hairs. They are often localized to the apical growing region of these cells, where their functions are tightly interconnected with cytoskeletal rearrangement and polar vesicle trafficking, which participate in tip growth as well as affect the generation and maintenance of the apical growing region. Recent advances in our understanding of the interface between these cellular activities and signaling in tip growth will be discussed.

Publication types

  • Review

MeSH terms

  • GTP Phosphohydrolases / metabolism
  • Meristem / cytology
  • Meristem / growth & development*
  • Meristem / metabolism*
  • Phosphatidylinositols / metabolism
  • Plant Development
  • Plants / enzymology
  • Reactive Oxygen Species / metabolism
  • Signal Transduction*


  • Phosphatidylinositols
  • Reactive Oxygen Species
  • GTP Phosphohydrolases