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Root cap-derived auxin pre-patterns the longitudinal axis of the Arabidopsis root

Wei Xuan (UGent) , Dominique Audenaert (UGent) , Boris Parizot (UGent) , Barbara Möller (UGent) , Maria Njo (UGent) , Bert De Rybel (UGent) , Gieljan De Rop (UGent) , Gert Van Isterdael (UGent) , Ari Pekka Mähönen, Steffen Vanneste (UGent) , et al.
(2015) CURRENT BIOLOGY. 25(10). p.1381-1388
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Biotechnology for a sustainable economy (Bio-Economy)
Abstract
During the exploration of the soil by plant roots, uptake of water and nutrients can be greatly fostered by a regular spacing of lateral roots (LRs). In the Arabidopsis root, a regular branching pattern depends on oscillatory gene activity to create prebranch sites, patches of cells competent to form LRs. Thus far, the molecular components regulating the oscillations still remain unclear. Here, we show that a local auxin source in the root cap, derived from the auxin precursor indole-3-butyric acid (IBA), modulates the oscillation amplitude, which in turn determines whether a prebranch site is created or not. Moreover, transcriptome profiling identified novel and IBA-regulated components of root patterning, such as the MEMBRANE-ASSOCIATED KINASE REGULATOR4 (MAKR4) that converts the prebranch sites into a regular spacing of lateral organs. Thus, the spatio-temporal patterning of roots is fine-tuned by the root cap-specific conversion pathway of IBA to auxin and the subsequent induction of MAKR4.
Keywords
FAMILY, TRANSPORT, MERISTEM, INDOLE-3-BUTYRIC ACID RESPONSE, GENE-EXPRESSION, LATERAL ROOT

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Chicago
Xuan, Wei, Dominique Audenaert, Boris Parizot, Barbara Möller, Maria Njo, Bert De Rybel, Gieljan De Rop, et al. 2015. “Root Cap-derived Auxin Pre-patterns the Longitudinal Axis of the Arabidopsis Root.” Current Biology 25 (10): 1381–1388.
APA
Xuan, W., Audenaert, D., Parizot, B., Möller, B., Njo, M., De Rybel, B., De Rop, G., et al. (2015). Root cap-derived auxin pre-patterns the longitudinal axis of the Arabidopsis root. CURRENT BIOLOGY, 25(10), 1381–1388.
Vancouver
1.
Xuan W, Audenaert D, Parizot B, Möller B, Njo M, De Rybel B, et al. Root cap-derived auxin pre-patterns the longitudinal axis of the Arabidopsis root. CURRENT BIOLOGY. 2015;25(10):1381–8.
MLA
Xuan, Wei, Dominique Audenaert, Boris Parizot, et al. “Root Cap-derived Auxin Pre-patterns the Longitudinal Axis of the Arabidopsis Root.” CURRENT BIOLOGY 25.10 (2015): 1381–1388. Print.
@article{6864435,
  abstract     = {During the exploration of the soil by plant roots, uptake of water and nutrients can be greatly fostered by a regular spacing of lateral roots (LRs). In the Arabidopsis root, a regular branching pattern depends on oscillatory gene activity to create prebranch sites, patches of cells competent to form LRs. Thus far, the molecular components regulating the oscillations still remain unclear. Here, we show that a local auxin source in the root cap, derived from the auxin precursor indole-3-butyric acid (IBA), modulates the oscillation amplitude, which in turn determines whether a prebranch site is created or not. Moreover, transcriptome profiling identified novel and IBA-regulated components of root patterning, such as the MEMBRANE-ASSOCIATED KINASE REGULATOR4 (MAKR4) that converts the prebranch sites into a regular spacing of lateral organs. Thus, the spatio-temporal patterning of roots is fine-tuned by the root cap-specific conversion pathway of IBA to auxin and the subsequent induction of MAKR4.},
  author       = {Xuan, Wei and Audenaert, Dominique and Parizot, Boris and M{\"o}ller, Barbara and Njo, Maria and De Rybel, Bert and De Rop, Gieljan and Van Isterdael, Gert and M{\"a}h{\"o}nen, Ari Pekka and Vanneste, Steffen and Beeckman, Tom},
  issn         = {0960-9822},
  journal      = {CURRENT BIOLOGY},
  language     = {eng},
  number       = {10},
  pages        = {1381--1388},
  title        = {Root cap-derived auxin pre-patterns the longitudinal axis of the Arabidopsis root},
  url          = {http://dx.doi.org/10.1016/j.cub.2015.03.046},
  volume       = {25},
  year         = {2015},
}

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