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Natural variation at XND1 impacts root hydraulics and trade-off for stress responses in Arabidopsis

Author

Listed:
  • Ning Tang

    (BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier)

  • Zaigham Shahzad

    (BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier
    University of Glasgow)

  • Fabien Lonjon

    (LIPM, Université de Toulouse, INRA, CNRS)

  • Olivier Loudet

    (Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay)

  • Fabienne Vailleau

    (LIPM, Université de Toulouse, INRA, CNRS)

  • Christophe Maurel

    (BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier)

Abstract

Soil water uptake by roots is a key component of plant performance and adaptation to adverse environments. Here, we use a genome-wide association analysis to identify the XYLEM NAC DOMAIN 1 (XND1) transcription factor as a negative regulator of Arabidopsis root hydraulic conductivity (Lpr). The distinct functionalities of a series of natural XND1 variants and a single nucleotide polymorphism that determines XND1 translation efficiency demonstrate the significance of XND1 natural variation at species-wide level. Phenotyping of xnd1 mutants and natural XND1 variants show that XND1 modulates Lpr through action on xylem formation and potential indirect effects on aquaporin function and that it diminishes drought stress tolerance. XND1 also mediates the inhibition of xylem formation by the bacterial elicitor flagellin and counteracts plant infection by the root pathogen Ralstonia solanacearum. Thus, genetic variation at XND1, and xylem differentiation contribute to resolving the major trade-off between abiotic and biotic stress resistance in Arabidopsis.

Suggested Citation

  • Ning Tang & Zaigham Shahzad & Fabien Lonjon & Olivier Loudet & Fabienne Vailleau & Christophe Maurel, 2018. "Natural variation at XND1 impacts root hydraulics and trade-off for stress responses in Arabidopsis," Nature Communications, Nature, vol. 9(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06430-8
    DOI: 10.1038/s41467-018-06430-8
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    Cited by:

    1. Xueting Gu & Fuyan Si & Zhengxiang Feng & Shunjie Li & Di Liang & Pei Yang & Chao Yang & Bin Yan & Jun Tang & Yu Yang & Tai Li & Lin Li & Jinling Zhou & Ji Li & Lili Feng & Ji-Yun Liu & Yuanzhu Yang &, 2023. "The OsSGS3-tasiRNA-OsARF3 module orchestrates abiotic-biotic stress response trade-off in rice," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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