Auxin controls rice root angle via kinase OsILA1-mediated cell wall modifications.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40971445.
- Also identified by DOI 10.1126/sciadv.ady2320 and PMC identifier 12448151.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Auxin-mediated root gravitropism critically determines root angle, a key trait that underpins root system architecture (RSA). Auxin response factors (ARFs) regulate this process, but their downstream targets and functions remain unclear. We demonstrate that OsARF12 and OsARF25 induce cell wall thickness in epidermal cells of the lower side of the root, positioning auxin as a "break" of these cells during gravistimulation by directly regulating <i>Increased Leaf Angle1</i> (<i>OsILA1</i>) through a dual set of auxin response elements. Our study therefore establishes a direct link between auxin transcriptional signaling and cell wall fortification, driving the differential cell elongation required for root gravitropism and angle.
Medical subject headings
- Cell Wall
- Indoleacetic Acids
- Plant Roots
- Oryza
- Plant Proteins