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Cell surface- and rho GTPase-based auxin signaling controls cellular interdigitation in Arabidopsis

(2010) CELL. 143(1). p.99-110
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Abstract
Auxin is a multifunctional hormone essential for plant development and pattern formation. A nuclear auxin-signaling system controlling auxin-induced gene expression is well established, but cytoplasmic auxin signaling, as in its coordination of cell polarization, is unexplored. We found a cytoplasmic auxin-signaling mechanism that modulates the interdigitated growth of Arabidopsis leaf epidermal pavement cells (PCs), which develop interdigitated lobes and indentations to form a puzzle-piece shape in a two-dimensional plane. PC interdigitation is compromised in leaves deficient in either auxin biosynthesis or its export mediated by PINFORMED 1 localized at the lobe tip. Auxin coordinately activates two Rho GTPases, ROP2 and ROP6, which promote the formation of complementary lobes and indentations, respectively. Activation of these ROPs by auxin occurs within 30 s and depends on AUXIN-BINDING PROTEIN 1. These findings reveal Rho GTPase-based auxin-signaling mechanisms, which modulate the spatial coordination of cell expansion across a field of cells.
Keywords
EXPANSION, GROWTH, ROP2 GTPASE, LEAF-CELLS, POLARITY, PLASMA-MEMBRANE, PLANT DEVELOPMENT, BOX PROTEIN TIR1, RESPONSIVE GENE-EXPRESSION, BINDING PROTEIN-1

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Chicago
Xu, Tongda, Mingzhang Wen, Shingo Nagawa, Ying Fu, Jin-Gui Chen, Ming-Jing Wu, Catherine Perrot-Rechenmann, Jiri Friml, Alan M Jones, and Zhenbiao Yang. 2010. “Cell Surface- and Rho GTPase-based Auxin Signaling Controls Cellular Interdigitation in Arabidopsis.” Cell 143 (1): 99–110.
APA
Xu, T., Wen, M., Nagawa, S., Fu, Y., Chen, J.-G., Wu, M.-J., Perrot-Rechenmann, C., et al. (2010). Cell surface- and rho GTPase-based auxin signaling controls cellular interdigitation in Arabidopsis. CELL, 143(1), 99–110.
Vancouver
1.
Xu T, Wen M, Nagawa S, Fu Y, Chen J-G, Wu M-J, et al. Cell surface- and rho GTPase-based auxin signaling controls cellular interdigitation in Arabidopsis. CELL. 2010;143(1):99–110.
MLA
Xu, Tongda, Mingzhang Wen, Shingo Nagawa, et al. “Cell Surface- and Rho GTPase-based Auxin Signaling Controls Cellular Interdigitation in Arabidopsis.” CELL 143.1 (2010): 99–110. Print.
@article{1070134,
  abstract     = {Auxin is a multifunctional hormone essential for plant development and pattern formation. A nuclear auxin-signaling system controlling auxin-induced gene expression is well established, but cytoplasmic auxin signaling, as in its coordination of cell polarization, is unexplored. We found a cytoplasmic auxin-signaling mechanism that modulates the interdigitated growth of Arabidopsis leaf epidermal pavement cells (PCs), which develop interdigitated lobes and indentations to form a puzzle-piece shape in a two-dimensional plane. PC interdigitation is compromised in leaves deficient in either auxin biosynthesis or its export mediated by PINFORMED 1 localized at the lobe tip. Auxin coordinately activates two Rho GTPases, ROP2 and ROP6, which promote the formation of complementary lobes and indentations, respectively. Activation of these ROPs by auxin occurs within 30 s and depends on AUXIN-BINDING PROTEIN 1. These findings reveal Rho GTPase-based auxin-signaling mechanisms, which modulate the spatial coordination of cell expansion across a field of cells.},
  author       = {Xu, Tongda and Wen, Mingzhang and Nagawa, Shingo and Fu, Ying and Chen, Jin-Gui and Wu, Ming-Jing and Perrot-Rechenmann, Catherine and Friml, Jiri and Jones, Alan M and Yang, Zhenbiao},
  issn         = {0092-8674},
  journal      = {CELL},
  keyword      = {EXPANSION,GROWTH,ROP2 GTPASE,LEAF-CELLS,POLARITY,PLASMA-MEMBRANE,PLANT DEVELOPMENT,BOX PROTEIN TIR1,RESPONSIVE GENE-EXPRESSION,BINDING PROTEIN-1},
  language     = {eng},
  number       = {1},
  pages        = {99--110},
  title        = {Cell surface- and rho GTPase-based auxin signaling controls cellular interdigitation in Arabidopsis},
  url          = {http://dx.doi.org/10.1016/j.cell.2010.09.003},
  volume       = {143},
  year         = {2010},
}

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