CEP–CEPR1 signalling inhibits the sucrose-dependent enhancement of lateral root growth

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dc.contributor.author Chapman, K en
dc.contributor.author Taleski, M en
dc.contributor.author Ogilvie, HA en
dc.contributor.author Imin, Nijat en
dc.contributor.author Djordjevic, MA en
dc.date.accessioned 2019-10-01T21:08:45Z en
dc.date.issued 2019-08 en
dc.identifier.citation Journal of experimental botany 70(15):3955-3967 Aug 2019 en
dc.identifier.issn 0022-0957 en
dc.identifier.uri http://hdl.handle.net/2292/48309 en
dc.description.abstract Lateral root (LR) proliferation is a major determinant of soil nutrient uptake. How resource allocation controls the extent of LR growth remains unresolved. We used genetic, physiological, transcriptomic, and grafting approaches to define a role for C-TERMINALLY ENCODED PEPTIDE RECEPTOR 1 (CEPR1) in controlling sucrose-dependent LR growth. CEPR1 inhibited LR growth in response to applied sucrose, other metabolizable sugars, and elevated light intensity. Pathways through CEPR1 restricted LR growth by reducing LR meristem size and the length of mature LR cells. RNA-sequencing of wild-type (WT) and cepr1-1 roots with or without sucrose treatment revealed an intersection of CEP-CEPR1 signalling with the sucrose transcriptional response. Sucrose up-regulated several CEP genes, supporting a specific role for CEP-CEPR1 in the response to sucrose. Moreover, genes with basally perturbed expression in cepr1-1 overlap with WT sucrose-responsive genes significantly. We found that exogenous CEP inhibited LR growth via CEPR1 by reducing LR meristem size and mature cell length. This result is consistent with CEP-CEPR1 acting to curtail the extent of sucrose-dependent LR growth. Reciprocal grafting indicates that LR growth inhibition requires CEPR1 in both the roots and shoots. Our results reveal a new role for CEP-CEPR1 signalling in controlling LR growth in response to sucrose. en
dc.publisher Oxford University Press (OUP) en
dc.relation.ispartofseries Journal of Experimental Botany en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://creativecommons.org/licenses/by-nc/4.0/ en
dc.title CEP–CEPR1 signalling inhibits the sucrose-dependent enhancement of lateral root growth en
dc.type Journal Article en
dc.identifier.doi 10.1093/jxb/erz207 en
pubs.issue 15 en
pubs.begin-page 3955 en
pubs.volume 70 en
dc.rights.holder Copyright: The authors en
pubs.end-page 3967 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 774947 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
pubs.record-created-at-source-date 2019-06-20 en
pubs.dimensions-id 31056646 en

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