The brassinosteroid receptor gene BRI1 safeguards cell-autonomous brassinosteroid signaling across tissues

• DOI: 10.1126/sciadv.adq3352
• Publication Date: 2024-09-25T19:00:24Z
• Authors: Noel Blanco-Touriñán; Surbhi Rana; Trevor M. Nolan; Kunkun Li; Nemanja Vukašinović; Che-Wei Hsu; Eugenia Russinova; Christian S. Hardtke
• Keywords: Brassinosteroid

Brassinosteroid signaling is essential for plant growth as exemplified by the dwarf phenotype of loss-of-function mutants in BRASSINOSTEROID INSENSITIVE 1 ( BRI1 ), a ubiquitously expressed Arabidopsis brassinosteroid receptor gene. Complementation brassinosteroid-blind expression with various tissue-specific promoters implied that local may instruct non–cell autonomously. Here, we performed such rescues panel variants and promoters, combination transgene knockouts. Our experiments demonstrate several tissues necessary but not sufficient rescue. Moreover, complementation requires genuine gene body sequence, which confers ubiquitous trace amounts are to promote brassinosteroid-dependent root growth. data, therefore, argue largely cell-autonomous action receptors.