Brassinosteroids define the stem elongation zone along the apical-basal axis to coordinate gravitropism and self-standability
Clicks: 3
ID: 317899
2026
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Emerging Content
0.6
/100
3 views
2 readers
AI Quality Assessment
Not analyzed
Readership in this journal
EmergingRanked #410 of 513 articles by views in Plant physiology and biochemistry : PPB
Most read
Least read
Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 513 in total.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
To achieve self-standability, the apical region of the stem must remain extensible and bendable, whereas the basal region must form a rigid supporting tissue. However, the mechanisms regulating stem growth along the apical-basal axis remain poorly understood. Here, we show that brassinosteroid (BR) biosynthesis and signaling are elevated in the apical, actively elongating regions of Arabidopsis and mung bean stems. Exogenous brassinolide promoted stem elongation, concomitant with increased cell wall extensibility, but impaired stem self-standability. In contrast, BR deficiency reduced the elongation/bendable zone and inhibited gravitropic curvature. Through spatiotemporal transcriptome analysis along the apical-basal axis of Arabidopsis inflorescence stems, combined with analysis of BR-responsive genes in the BR-dependent transition zone, we identified a set of genes, termed BR Down-regulated in Stem (BRDS) genes. BRDS gene expression was repressed by BR and predominantly expressed in the non-elongating region, indicating that BR plays a central role in spatial gene expression along the apical-basal axis. These genes were enriched for functions related to secondary cell wall formation, suggesting that BR differentially regulates primary and secondary cell wall formation. While auxin governs growth direction along the abaxial-adaxial axis of the stem, BR defines the spatial domains of elongation along the apical-basal axis of the stem. The synergistic action of these hormones determines both the direction and spatial domain of gravitropic bending, thereby enabling stem elongation, gravitropism, and standability in three-dimensional space.
| Reference Key |
openalex_W7165148875
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | Yusuke Kakei, M Okumura, Chiaki Yamazaki, Akari Kimura, Nodoka Ishiyama, H Kashima, Rina Kawashima, Akiko Sato, Takayuki Hoson, Kouichi Soga, Shozo Fujioka, Hitoshi Mori, Yusuke Kamiyoshihara, Ayumi Yamagami, Takeshi Nakano, Tadao Asami, Yukihisa Shimada |
| Journal | Plant physiology and biochemistry : PPB |
| Year | 2026 |
| DOI |
10.1093/plphys/kiag359
|
| URL | |
| Keywords | Keywords not found |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.