JOURNAL ARTICLE

The microRNA7833-AUX6 module plays a critical role in wood development by modulating cellular auxin influx in Populus tomentosa.

  • Published In: Tree Physiology, 2024, v. 44, n. 3. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Xie, Haiyan; Ye, Xiao; Liu, Chang; Li, Dan; Wang, Xianqiang; Xu, Changzheng; Li, Caofeng; Luo, Keming; Fan, Di; Wu, Nengbiao 3 of 3

Abstract

This article focuses on the regulatory role of the microRNA miR7833 and its target auxin influx carrier AUX6 in secondary xylem (wood) development in Populus tomentosa. The study demonstrates that miR7833 is predominantly expressed in the vascular cambium and negatively regulates cambial cell division and xylem differentiation by specifically targeting and repressing AUX5 and AUX6, members of the AUX/LAX family of auxin influx carriers. AUX6 is shown to be enriched in developing xylem and acts as a positive regulator of cell proliferation and differentiation during wood formation. Chemical inhibition of auxin influx carriers abolishes the effects of miR7833 and AUX6 on xylem development, indicating that the miR7833-AUX6 module modulates wood formation through controlling auxin influx. These findings reveal a post-transcriptional mechanism by which auxin influx is spatially and quantitatively regulated to coordinate vascular development in woody plants.

Additional Information

  • Source:Tree Physiology. 2024/03, Vol. 44, Issue 3, p1
  • Document Type:Article
  • Subject Area:Science
  • Publication Date:2024
  • ISSN:0829-318X
  • DOI:10.1093/treephys/tpad153
  • Accession Number:176404321
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