ROP GTPase regulation of pollen tube growth through the dynamics of tip-localized F-actin

Ying Gu, Vanessa Vernoud, Ying Fu, Zhenbiao Yang

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

Pollen tubes expand by tip growth and extend directionally toward the ovule to deliver sperms during pollination. They provide an excellent model system for the study of cell polarity control and tip growth, because they grow into uniformly shaped cylindrical cells in culture. Mechanisms underlying tip growth are poorly understood in pollen tubes. It has been demonstrated that ROP1, a pollen-specific member of the plant-specific Rop subfamily of Rho GTPases, is a central regulator of pollen tube tip growth. Recent studies in pollen from Arabidopsis and other species have revealed a ROP-mediated signalling network that is localized to the apical PM region of pollen tubes. The results provide evidence that the localization of this signalling network establishes the site for tip growth and the localized activation of this signalling network regulates the dynamics of tip F-actin. These results have shown that the ROP1-mediated dynamics of tip F-actin is a key cellular mechanism behind tip growth in pollen tubes. Current understanding of the molecular basis for the regulation of the tip actin dynamics will be discussed.

Original languageEnglish (US)
Pages (from-to)93-101
Number of pages9
JournalJournal of experimental botany
Volume54
Issue number380
DOIs
StatePublished - Jan 1 2003

Fingerprint

Pollen Tube
GTP Phosphohydrolases
guanosinetriphosphatase
pollen tubes
actin
Actins
Growth
Pollen
pollen
Ovule
Pollination
rho GTP-Binding Proteins
Cell Polarity
ovules
pollination
Arabidopsis
cell culture
spermatozoa
Spermatozoa
ROP

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

Gu, Ying ; Vernoud, Vanessa ; Fu, Ying ; Yang, Zhenbiao. / ROP GTPase regulation of pollen tube growth through the dynamics of tip-localized F-actin. In: Journal of experimental botany. 2003 ; Vol. 54, No. 380. pp. 93-101.
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ROP GTPase regulation of pollen tube growth through the dynamics of tip-localized F-actin. / Gu, Ying; Vernoud, Vanessa; Fu, Ying; Yang, Zhenbiao.

In: Journal of experimental botany, Vol. 54, No. 380, 01.01.2003, p. 93-101.

Research output: Contribution to journalArticle

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AU - Gu, Ying

AU - Vernoud, Vanessa

AU - Fu, Ying

AU - Yang, Zhenbiao

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AB - Pollen tubes expand by tip growth and extend directionally toward the ovule to deliver sperms during pollination. They provide an excellent model system for the study of cell polarity control and tip growth, because they grow into uniformly shaped cylindrical cells in culture. Mechanisms underlying tip growth are poorly understood in pollen tubes. It has been demonstrated that ROP1, a pollen-specific member of the plant-specific Rop subfamily of Rho GTPases, is a central regulator of pollen tube tip growth. Recent studies in pollen from Arabidopsis and other species have revealed a ROP-mediated signalling network that is localized to the apical PM region of pollen tubes. The results provide evidence that the localization of this signalling network establishes the site for tip growth and the localized activation of this signalling network regulates the dynamics of tip F-actin. These results have shown that the ROP1-mediated dynamics of tip F-actin is a key cellular mechanism behind tip growth in pollen tubes. Current understanding of the molecular basis for the regulation of the tip actin dynamics will be discussed.

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