BRI1 controls vascular cell fate in the Arabidopsis root through RLP44 and phytosulfokine signaling.

ABSTRACT: Multicellularity arose independently in plants and animals, but invariably requires a robust determination and maintenance of cell fate that is adaptive to the environment. This is exemplified by the highly specialized water- and nutrient-conducting cells of the plant vasculature, the organization of which is already prepatterned close to the stem-cell niche, but can be modified according to extrinsic cues. Here, we show that the hormone receptor BRASSINOSTEROID INSENSITIVE 1 (BRI1) is required for root vascular cell-fate maintenance, as BRI1 mutants show ectopic xylem in procambial position. However, this phenotype seems unrelated to canonical brassinosteroid signaling outputs. Instead, BRI1 is required for the expression and function of its interacting partner RECEPTOR-LIKE PROTEIN 44 (R

SUBMITTER: Holzwart E 

PROVIDER: S-EPMC6243276 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature