ATXR2 as a core regulator of de novo root organogenesis

Plant Signal Behav. 2018 Mar 4;13(3):e1449543. doi: 10.1080/15592324.2018.1449543. Epub 2018 Mar 27.

Abstract

Tissue identity is plastically regulated in plants, and chromatin modifiers/remodelers are main players of cell fate changes. Callus formation is an intriguing example of cell fate transition. Leaf explants can form callus tissues, which resemble lateral root primordium, on callus-inducing medium (CIM). We recently demonstrated that the ARABIDOPSIS TRITHORAX-RELATED 2 (ATXR2) protein, which deposits H3K36me3 at genomic level, regulates callus formation on CIM. Consistent with the role of ATXR2 in conferring root identity, lateral root formation was significantly reduced in atxr2-deficient mutants. Furthermore, atxr2 mutants also displayed defects in adventitious root formation from wounded leaf tissues on hormone-free medium. Our findings indicate that ATXR2 is a genuine regulator of de novo root organogenesis.

Keywords: ATXR2; LBD; adventitious root; callus formation; de novo root organogenesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arabidopsis / growth & development*
  • Arabidopsis / metabolism*
  • Arabidopsis Proteins / metabolism*
  • Organogenesis*
  • Plant Roots / growth & development*
  • Plant Roots / metabolism*

Substances

  • Arabidopsis Proteins

Grants and funding

This work was supported by the Basic Science Research (NRF-2016R1D1A1B03931139) and Basic Research Laboratory (NRF-2017R1A4A1015620) programs provided by the National Research Foundation of Korea and by the Next-Generation BioGreen 21 Program (PJ01314501) provided by the Rural Development Administration.