Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 67, Issue 16, Pages 4889-4899Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erw231
Keywords
Arabidopsis; CEP5; lateral root initiation; post-translationally modified peptide; receptor kinase; XIP1
Categories
Funding
- BBSRC David Phillips Fellowship [BB_BB/H022457/1]
- Marie Curie European Reintegration Grant [PERG06-GA-2009-256354]
- Interuniversity Attraction Poles Programme from the Belgian Federal Science Policy Office [IAP VI/33, IUAP P7/29]
- Research Foundation Flanders (FWO)
- Biotechnology and Biological Science Research Council
- Agency for Innovation by Science and Technology (IWT)
- Ghent University
- Biotechnology and Biological Sciences Research Council [1094837, BB/H022457/1] Funding Source: researchfish
- BBSRC [BB/H022457/1] Funding Source: UKRI
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We identified C-TERMINALLY ENCODED PEPTIDE 5 (CEP5) as a novel, auxin-repressed and phloem pole-expressed signal assisting in the formation of lateral roots.Roots explore the soil for water and nutrients through the continuous production of lateral roots. Lateral roots are formed at regular distances in a steadily elongating organ, but how future sites for lateral root formation become established is not yet understood. Here, we identified C-TERMINALLY ENCODED PEPTIDE 5 (CEP5) as a novel, auxin-repressed and phloem pole-expressed signal assisting in the formation of lateral roots. In addition, based on genetic and expression data, we found evidence for the involvement of its proposed receptor, XYLEM INTERMIXED WITH PHLOEM 1 (XIP1)/CEP RECEPTOR 1 (CEPR1), during the process of lateral root initiation. In conclusion, we report here on the existence of a peptide ligand-receptor kinase interaction that impacts lateral root initiation. Our results represent an important step towards the understanding of the cellular communication implicated in the early phases of lateral root formation.
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