Auxin minimum defines a developmental window for lateral root initiation

J. Dubrovsky, S. Napsucialy Mendivil, J. Duclercq, Y. Cheng, S. Shishkova, M. Ivanchenko, J. Friml, A. Murphy, E. Benková, New Phytologist 191 (2011) 970–983.

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Abstract
Root system architecture depends on lateral root (LR) initiation that takes place in a relatively narrow developmental window (DW). Here, we analyzed the role of auxin gradients established along the parent root in defining this DW for LR initiation. Correlations between auxin distribution and response, and spatiotemporal control of LR initiation were analyzed in Arabidopsis thaliana and tomato (Solanum lycopersicum). In both Arabidopsis and tomato roots, a well defined zone, where auxin content and response are minimal, demarcates the position of a DW for founder cell specification and LR initiation. We show that in the zone of auxin minimum pericycle cells have highest probability to become founder cells and that auxin perception via the TIR1/AFB pathway, and polar auxin transport, are essential for the establishment of this zone. Altogether, this study reveals that the same morphogen-like molecule, auxin, can act simultaneously as a morphogenetic trigger of LR founder cell identity and as a gradient-dependent signal defining positioning of the founder cell specification. This auxin minimum zone might represent an important control mechanism ensuring the LR initiation steadiness and the acropetal LR initiation pattern. © 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.
Publishing Year
Date Published
2011-01-01
Journal Title
New Phytologist
Volume
191
Issue
4
Page
970 - 983
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Dubrovsky J, Napsucialy Mendivil S, Duclercq J, et al. Auxin minimum defines a developmental window for lateral root initiation. New Phytologist. 2011;191(4):970-983. doi: 10.1111/j.1469-8137.2011.03757.x
Dubrovsky, J., Napsucialy Mendivil, S., Duclercq, J., Cheng, Y., Shishkova, S., Ivanchenko, M., … Benková, E. (2011). Auxin minimum defines a developmental window for lateral root initiation. New Phytologist, 191(4), 970–983. https://doi.org/ 10.1111/j.1469-8137.2011.03757.x
Dubrovsky, Joseph, Selene Napsucialy Mendivil, Jérôme Duclercq, Yan Cheng, Svetlana Shishkova, Maria Ivanchenko, Jirí Friml, Angus Murphy, and Eva Benková. “Auxin Minimum Defines a Developmental Window for Lateral Root Initiation.” New Phytologist 191, no. 4 (2011): 970–83. https://doi.org/ 10.1111/j.1469-8137.2011.03757.x.
J. Dubrovsky et al., “Auxin minimum defines a developmental window for lateral root initiation,” New Phytologist, vol. 191, no. 4, pp. 970–983, 2011.
Dubrovsky J, Napsucialy Mendivil S, Duclercq J, Cheng Y, Shishkova S, Ivanchenko M, Friml J, Murphy A, Benková E. 2011. Auxin minimum defines a developmental window for lateral root initiation. New Phytologist. 191(4), 970–983.
Dubrovsky, Joseph, et al. “Auxin Minimum Defines a Developmental Window for Lateral Root Initiation.” New Phytologist, vol. 191, no. 4, Wiley-Blackwell, 2011, pp. 970–83, doi: 10.1111/j.1469-8137.2011.03757.x.

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