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A DAO1-Mediated Circuit Controls Auxin and Jasmonate Crosstalk Robustness during Adventitious Root Initiation in Arabidopsis
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Department of Forest Genetics and Physiology, Swedish Agriculture University, Umea, Sweden.
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France.ORCID iD: 0000-0003-2985-6649
2019 (English)In: International Journal of Molecular Sciences, ISSN 1422-0067, E-ISSN 1422-0067, Vol. 20, no 18, article id 4428Article in journal (Refereed) Published
Abstract [en]

Adventitious rooting is a post-embryonic developmental program governed by a multitude of endogenous and environmental cues. Auxin, along with other phytohormones, integrates and translates these cues into precise molecular signatures to provide a coherent developmental output. Auxin signaling guides every step of adventitious root (AR) development from the early event of cell reprogramming and identity transitions until emergence. We have previously shown that auxin signaling controls the early events of AR initiation (ARI) by modulating the homeostasis of the negative regulator jasmonate (JA). Although considerable knowledge has been acquired about the role of auxin and JA in ARI, the genetic components acting downstream of JA signaling and the mechanistic basis controlling the interaction between these two hormones are not well understood. Here we provide evidence that COI1-dependent JA signaling controls the expression of DAO1 and its closely related paralog DAO2. In addition, we show that the dao1-1 loss of function mutant produces more ARs than the wild type, probably due to its deficiency in accumulating JA and its bioactive metabolite JA-Ile. Together, our data indicate that DAO1 controls a sensitive feedback circuit that stabilizes the auxin and JA crosstalk during ARI.

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 20, no 18, article id 4428
Keywords [en]
adventitious roots, auxin, auxin oxidation, jasmonates, organogenesis
National Category
Developmental Biology
Identifiers
URN: urn:nbn:se:umu:diva-164948DOI: 10.3390/ijms20184428ISI: 000489100500107PubMedID: 31505771OAI: oai:DiVA.org:umu-164948DiVA, id: diva2:1367960
Available from: 2019-11-05 Created: 2019-11-05 Last updated: 2019-11-06Bibliographically approved
In thesis
1. A molecular network mediating adventitious root initiation in Arabidopsis thaliana
Open this publication in new window or tab >>A molecular network mediating adventitious root initiation in Arabidopsis thaliana
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Umeå: Umeå universitet, 2019. p. 52
Keywords
Adventitious rooting, auxin, jasmonate, cytokinin, phytohormone perception and signalling, vegetative propagation
National Category
Developmental Biology
Identifiers
urn:nbn:se:umu:diva-164953 (URN)978-91-7855-138-5 (ISBN)
Public defence
2019-11-28, KB.E3.01 (Lilla hörsalen), KBC-huset, Umeå universitet, Umeå, 10:00 (English)
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Supervisors
Available from: 2019-11-07 Created: 2019-11-05 Last updated: 2019-11-14Bibliographically approved

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Lakehal, AbdellahNovak, OndrejBellini, Catherine

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