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DELLA-mediated gibberellin signalling regulates Nod factor signalling and rhizobial infection

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  • Camille Fonouni-Farde

    (Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Univ Paris-Diderot, Univ Paris Sud, INRA, Univ Evry, Sorbonne Paris-Cité, Université Paris-Saclay)

  • Sovanna Tan

    (Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Univ Paris-Diderot, Univ Paris Sud, INRA, Univ Evry, Sorbonne Paris-Cité, Université Paris-Saclay)

  • Maël Baudin

    (Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, CNRS
    Present address: Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California 94720, USA)

  • Mathias Brault

    (Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Univ Paris-Diderot, Univ Paris Sud, INRA, Univ Evry, Sorbonne Paris-Cité, Université Paris-Saclay)

  • Jiangqi Wen

    (The Samuel Roberts Noble Foundation)

  • Kirankumar S. Mysore

    (The Samuel Roberts Noble Foundation)

  • Andreas Niebel

    (Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, CNRS)

  • Florian Frugier

    (Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Univ Paris-Diderot, Univ Paris Sud, INRA, Univ Evry, Sorbonne Paris-Cité, Université Paris-Saclay)

  • Anouck Diet

    (Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Univ Paris-Diderot, Univ Paris Sud, INRA, Univ Evry, Sorbonne Paris-Cité, Université Paris-Saclay)

Abstract

Legumes develop symbiotic interactions with rhizobial bacteria to form nitrogen-fixing nodules. Bacterial Nod factors (NFs) and plant regulatory pathways modulating NF signalling control rhizobial infections and nodulation efficiency. Here we show that gibberellin (GA) signalling mediated by DELLA proteins inhibits rhizobial infections and controls the NF induction of the infection marker ENOD11 in Medicago truncatula. Ectopic expression of a constitutively active DELLA protein in the epidermis is sufficient to promote ENOD11 expression in the absence of symbiotic signals. We show using heterologous systems that DELLA proteins can interact with the nodulation signalling pathway 2 (NSP2) and nuclear factor-YA1 (NF-YA1) transcription factors that are essential for the activation of NF responses. Furthermore, MtDELLA1 can bind the ERN1 (ERF required for nodulation 1) promoter and positively transactivate its expression. Overall, we propose that GA-dependent action of DELLA proteins may directly regulate the NSP1/NSP2 and NF-YA1 activation of ERN1 transcription to regulate rhizobial infections.

Suggested Citation

  • Camille Fonouni-Farde & Sovanna Tan & Maël Baudin & Mathias Brault & Jiangqi Wen & Kirankumar S. Mysore & Andreas Niebel & Florian Frugier & Anouck Diet, 2016. "DELLA-mediated gibberellin signalling regulates Nod factor signalling and rhizobial infection," Nature Communications, Nature, vol. 7(1), pages 1-13, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12636
    DOI: 10.1038/ncomms12636
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    Cited by:

    1. Mengjie Qiao & Ruibo Sun & Zixuan Wang & Kenneth Dumack & Xingguang Xie & Chuanchao Dai & Ertao Wang & Jizhong Zhou & Bo Sun & Xinhua Peng & Michael Bonkowski & Yan Chen, 2024. "Legume rhizodeposition promotes nitrogen fixation by soil microbiota under crop diversification," Nature Communications, Nature, vol. 15(1), pages 1-15, December.
    2. Qiang Zhang & Shuangshuang Wang & Qiujin Xie & Yuanjun Xia & Lei Lu & Mingxing Wang & Gang Wang & Siyu Long & Yunfei Cai & Ling Xu & Ertao Wang & Yina Jiang, 2023. "Control of arbuscule development by a transcriptional negative feedback loop in Medicago," Nature Communications, Nature, vol. 14(1), pages 1-14, December.

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