Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 116, Issue 37, Pages 18710-18716Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1807863116
Keywords
meristem; cambium; xylem; wood development
Categories
Funding
- bioinformatics core service of the IBMCP
- Spanish Ministry of Economy [BIO2016-79147R]
- Clarendon Scholarship
- Biotechnology and Biological Sciences Research Council (BBSRC) [BB/J014427/1]
- Edward Penley Abraham Cephalosporin Scholarship
- Ramon y Cajal contract from the Spanish Ministry of Economy [RYC-2014-15752]
- Marie Curie fellowship [H2020-MSCA-IF-2014-655172]
Ask authors/readers for more resources
In plants, secondary growth results in radial expansion of stems and roots, generating large amounts of biomass in the form of wood. Using genome-wide association studies (GWAS)-guided reverse genetics in Arabidopsis thaliana, we discovered SOBIR1/EVR, previously known to control plant immunoresponses and abscission, as a regulator of secondary growth. We present anatomical, genetic, and molecular evidence indicating that SOBIR1/EVR prevents the precocious differentiation of xylem fiber, a key cell type for wood development. SOBIR1/EVR acts through a mechanism that involves BREVIPEDICELLUS (BP) and ERECTA (ER), 2 proteins previously known to regulate xylem fiber development. We demonstrate that BP binds SOBIR1/EVR promoter and that SOBIR1/EVR expression is enhanced in bp mutants, suggesting a direct, negative regulation of BP over SOBIR1/EVR expression. We show that SOBIR1/EVR physically interacts with ER and that defects caused by the sobir1/evr mutation are aggravated by mutating ER, indicating that SOBIR1/EVR and ERECTA act together in the control of the precocious formation of xylem fiber development.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available