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A root cap-localized NAC transcription factor controls root halotropic response to salt stress in Arabidopsis

Author

Listed:
  • Lulu Zheng

    (Nanjing Agricultural University
    Ghent University
    VIB-UGent Center for Plant Systems Biology)

  • Yongfeng Hu

    (China Three Gorges University)

  • Tianzhao Yang

    (Anhui Agricultural University)

  • Zhen Wang

    (Nanjing Agricultural University)

  • Daoyuan Wang

    (Nanjing Agricultural University)

  • Letian Jia

    (Nanjing Agricultural University)

  • Yuanming Xie

    (Nanjing Agricultural University)

  • Long Luo

    (Anhui Agricultural University)

  • Weicong Qi

    (Jiangsu Academy of Agricultural Sciences)

  • Yuanda Lv

    (Jiangsu Academy of Agricultural Sciences)

  • Tom Beeckman

    (Ghent University
    VIB-UGent Center for Plant Systems Biology)

  • Wei Xuan

    (Nanjing Agricultural University)

  • Yi Han

    (Anhui Agricultural University)

Abstract

Plants are capable of altering root growth direction to curtail exposure to a saline environment (termed halotropism). The root cap that surrounds root tip meristematic stem cells plays crucial roles in perceiving and responding to environmental stimuli. However, how the root cap mediates root halotropism remains undetermined. Here, we identified a root cap-localized NAC transcription factor, SOMBRERO (SMB), that is required for root halotropism. Its effect on root halotropism is attributable to the establishment of asymmetric auxin distribution in the lateral root cap (LRC) rather than to the alteration of cellular sodium equilibrium or amyloplast statoliths. Furthermore, SMB is essential for basal expression of the auxin influx carrier gene AUX1 in LRC and for auxin redistribution in a spatiotemporally-regulated manner, thereby leading to directional bending of roots away from higher salinity. Our findings uncover an SMB-AUX1-auxin module linking the role of the root cap to the activation of root halotropism.

Suggested Citation

  • Lulu Zheng & Yongfeng Hu & Tianzhao Yang & Zhen Wang & Daoyuan Wang & Letian Jia & Yuanming Xie & Long Luo & Weicong Qi & Yuanda Lv & Tom Beeckman & Wei Xuan & Yi Han, 2024. "A root cap-localized NAC transcription factor controls root halotropic response to salt stress in Arabidopsis," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46482-7
    DOI: 10.1038/s41467-024-46482-7
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    References listed on IDEAS

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    1. Géraldine Brunoud & Darren M. Wells & Marina Oliva & Antoine Larrieu & Vincent Mirabet & Amy H. Burrow & Tom Beeckman & Stefan Kepinski & Jan Traas & Malcolm J. Bennett & Teva Vernoux, 2012. "A novel sensor to map auxin response and distribution at high spatio-temporal resolution," Nature, Nature, vol. 482(7383), pages 103-106, February.
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