A Jasmonate Signaling Network Activates Root Stem Cells and Promotes Regeneration

Wenkun Zhou, Jose L. Lozano-Torres, Ikram Blilou, Xiaoyue Zhang, Qingzhe Zhai, Geert Smant, Chuanyou Li, Ben Scheres*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

190 Scopus citations

Abstract

Plants are sessile and have to cope with environmentally induced damage through modification of growth and defense pathways. How tissue regeneration is triggered in such responses and whether this involves stem cell activation is an open question. The stress hormone jasmonate (JA) plays well-established roles in wounding and defense responses. JA also affects growth, which is hitherto interpreted as a trade-off between growth and defense. Here, we describe a molecular network triggered by wound-induced JA that promotes stem cell activation and regeneration. JA regulates organizer cell activity in the root stem cell niche through the RBR-SCR network and stress response protein ERF115. Moreover, JA-induced ERF109 transcription stimulates CYCD6;1 expression, functions upstream of ERF115, and promotes regeneration. Soil penetration and response to nematode herbivory induce and require this JA-mediated regeneration response. Therefore, the JA tissue damage response pathway induces stem cell activation and regeneration and activates growth after environmental stress. Stem cell activation and regeneration after tissue damage in Arabidopsis roots is mediated by a jasmonate signaling network.

Original languageEnglish (US)
Pages (from-to)942-956.e14
JournalCell
Volume177
Issue number4
DOIs
StatePublished - May 2 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Inc.

Keywords

  • ERF109
  • ERF115
  • Jasmonate
  • SCARECROW
  • cyclinD6
  • regeneration
  • retinoblastoma related
  • root knot nematode
  • stem cells
  • tissue damage

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology

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