Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 455681
Title Auxin reflux between the endodermis and pericycle promotes lateral root initiation
Author(s) Marhavy, P.; Vanstraelen, M.; Rybel, B.P.M. de; Ding, Z.J.; Bennett, M.J.; Beeckman, T.; Benkova, E.
Source The EMBO Journal 32 (2013)1. - ISSN 0261-4189 - p. 149 - 158.
DOI http://dx.doi.org/10.1038/emboj.2012.303
Department(s) Biochemistry
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) arabidopsis-thaliana - gene-expression - cell-cycle - efflux - transport - family - organization - gradients - proteins - meristem
Abstract Lateral root (LR) formation is initiated when pericycle cells accumulate auxin, thereby acquiring founder cell (FC) status and triggering asymmetric cell divisions, giving rise to a new primordium. How this auxin maximum in pericycle cells builds up and remains focused is not understood. We report that the endodermis plays an active role in the regulation of auxin accumulation and is instructive for FCs to progress during the LR initiation (LRI) phase. We describe the functional importance of a PIN3 (PIN-formed) auxin efflux carrier-dependent hormone reflux pathway between overlaying endodermal and pericycle FCs. Disrupting this reflux pathway causes dramatic defects in the progress of FCs towards the next initiation phase. Our data identify an unexpected regulatory function for the endodermis in LRI as part of the fine-tuning mechanism that appears to act as a check point in LR organogenesis after FCs are specified. The EMBO Journal (2013) 32, 149-158. doi:10.1038/emboj.2012.303; Published online 23 November 2012
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