CEP receptor signalling controls root system architecture in Arabidopsis and Medicago

CEP receptor signalling controls root system architecture in Arabidopsis and Medicago

© 2020 The Authors. New Phytologist © 2020 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1984. - 226(2020), 6 vom: 11. Juni, Seite 1809-1821
1. Verfasser: Chapman, Kelly (VerfasserIn)
Weitere Verfasser: Ivanovici, Ariel, Taleski, Michael, Sturrock, Craig J, Ng, Jason L P, Mohd-Radzman, Nadiatul A, Frugier, Florian, Bennett, Malcolm J, Mathesius, Ulrike, Djordjevic, Michael A
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't CEP CEPR1 CRA2 gravitropic set-point angle lateral root peptide hormone root system architecture rootward auxin transport mehr... Arabidopsis Proteins CEPR1 protein, Arabidopsis Indoleacetic Acids Receptors, Peptide
Beschreibung
Zusammenfassung:© 2020 The Authors. New Phytologist © 2020 New Phytologist Trust.
Root system architecture (RSA) influences the effectiveness of resources acquisition from soils but the genetic networks that control RSA remain largely unclear. We used rhizoboxes, X-ray computed tomography, grafting, auxin transport measurements and hormone quantification to demonstrate that Arabidopsis and Medicago CEP (C-TERMINALLY ENCODED PEPTIDE)-CEP RECEPTOR signalling controls RSA, the gravitropic set-point angle (GSA) of lateral roots (LRs), auxin levels and auxin transport. We showed that soil-grown Arabidopsis and Medicago CEP receptor mutants have a narrower RSA, which results from a steeper LR GSA. Grafting showed that CEPR1 in the shoot controls GSA. CEP receptor mutants exhibited an increase in rootward auxin transport and elevated shoot auxin levels. Consistently, the application of auxin to wild-type shoots induced a steeper GSA and auxin transport inhibitors counteracted the CEP receptor mutant's steep GSA phenotype. Concordantly, CEP peptides increased GSA and inhibited rootward auxin transport in wild-type but not in CEP receptor mutants. The results indicated that CEP-CEP receptor-dependent signalling outputs in Arabidopsis and Medicago control overall RSA, LR GSA, shoot auxin levels and rootward auxin transport. We propose that manipulating CEP signalling strength or CEP receptor downstream targets may provide means to alter RSA
Beschreibung:Date Completed 14.05.2021
Date Revised 14.05.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.16483