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Auxin-dependent regulation of lateral root positioning in the basal meristem of Arabidopsis

(2007) DEVELOPMENT. 134(4). p.681-690
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Abstract
In plants, the developmental mechanisms that regulate the positioning of lateral organs along the primary root are currently unknown. We present evidence on how lateral root initiation is controlled in a spatiotemporal manner in the model plant Arabidopsis thaliana. First, lateral roots are spaced along the main axis in a regular left-right alternating pattern that correlates with gravity-induced waving and depends on AUX1, an auxin influx carrier essential for gravitropic response. Second, we found evidence that the priming of pericycle cells for lateral root initiation might take place in the basal meristem, correlating with elevated auxin sensitivity in this part of the root. This local auxin responsiveness oscillates with peaks of expression at regular intervals of 15 hours. Each peak in the auxin-reporter maximum correlates with the formation of a consecutive lateral root. Third, auxin signaling in the basal meristem triggers pericycle cells for lateral root initiation prior to the action of INDOLE-3-ACETIC ACID14 (SOLITARY ROOT).
Keywords
auxin, Arabidopsis, basal meristem, lateral root, root branching, CELL-CYCLE, INITIATION, THALIANA, GROWTH, GENE, GRAVITROPISM, EXPRESSION, TRANSPORT, SEEDLINGS, PATTERN

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Citation

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Chicago
De Smet, Ive, Takuya Tetsumura, Bert De Rybel, Nicolas Frei dit Frey, Laurent Laplaze, Ilda Casimiro, Ranjan Swarup, et al. 2007. “Auxin-dependent Regulation of Lateral Root Positioning in the Basal Meristem of Arabidopsis.” Development 134 (4): 681–690.
APA
De Smet, Ive, Tetsumura, T., De Rybel, B., Frey, N. F. dit, Laplaze, L., Casimiro, I., Swarup, R., et al. (2007). Auxin-dependent regulation of lateral root positioning in the basal meristem of Arabidopsis. DEVELOPMENT, 134(4), 681–690.
Vancouver
1.
De Smet I, Tetsumura T, De Rybel B, Frey NF dit, Laplaze L, Casimiro I, et al. Auxin-dependent regulation of lateral root positioning in the basal meristem of Arabidopsis. DEVELOPMENT. 2007;134(4):681–90.
MLA
De Smet, Ive, Takuya Tetsumura, Bert De Rybel, et al. “Auxin-dependent Regulation of Lateral Root Positioning in the Basal Meristem of Arabidopsis.” DEVELOPMENT 134.4 (2007): 681–690. Print.
@article{409083,
  abstract     = {In plants, the developmental mechanisms that regulate the positioning of lateral organs along the primary root are currently unknown. We present evidence on how lateral root initiation is controlled in a spatiotemporal manner in the model plant Arabidopsis thaliana. First, lateral roots are spaced along the main axis in a regular left-right alternating pattern that correlates with gravity-induced waving and depends on AUX1, an auxin influx carrier essential for gravitropic response. Second, we found evidence that the priming of pericycle cells for lateral root initiation might take place in the basal meristem, correlating with elevated auxin sensitivity in this part of the root. This local auxin responsiveness oscillates with peaks of expression at regular intervals of 15 hours. Each peak in the auxin-reporter maximum correlates with the formation of a consecutive lateral root. Third, auxin signaling in the basal meristem triggers pericycle cells for lateral root initiation prior to the action of INDOLE-3-ACETIC ACID14 (SOLITARY ROOT).},
  author       = {De Smet, Ive and Tetsumura, Takuya and De Rybel, Bert and Frey, Nicolas Frei dit and Laplaze, Laurent and Casimiro, Ilda and Swarup, Ranjan and Naudts, Mirande and Vanneste, Steffen and Audenaert, Dominique and Inz{\'e}, Dirk and Bennett, Malcolm J and Beeckman, Tom},
  issn         = {0950-1991},
  journal      = {DEVELOPMENT},
  keyword      = {auxin,Arabidopsis,basal meristem,lateral root,root branching,CELL-CYCLE,INITIATION,THALIANA,GROWTH,GENE,GRAVITROPISM,EXPRESSION,TRANSPORT,SEEDLINGS,PATTERN},
  language     = {eng},
  number       = {4},
  pages        = {681--690},
  title        = {Auxin-dependent regulation of lateral root positioning in the basal meristem of Arabidopsis},
  url          = {http://dx.doi.org/10.1242/dev.02753},
  volume       = {134},
  year         = {2007},
}

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