A circadian rheostat drives proton electrochemical gradients to optimize cell-type-specific growth in Arabidopsis
Abstract
)-pump ATPase AHA3 by directly binding their promoters. The repression decreases sucrose loading into the phloem and slows transport velocity. Expressing CCA1 in the phloem is sufficient to inhibit root elongation, whereas AHA3 overexpression in CCA1 overexpressing seedlings rescues root growth. Thus, a circadian rheostat orchestrates electrochemical signals to optimize source capacity with sink demand.
Fields of Study & Subjects
Plant Molecular Biology Research
Plant nutrient uptake and metabolism
Plant and Biological Electrophysiology Studies
Publication details
- Journal / source
- Cell
- Publisher
- Elsevier BV
- Volume
- 189
- Issue
- 6
- Pages
- 1785–1801.e13
- Publication date
- 18 February 2026
- Language
- EN