Related Experiment Video
Updated: Jun 3, 2026

A Seed Coat Bedding Assay to Genetically Explore In Vitro How the Endosperm Controls Seed Germination in Arabidopsis thaliana
Published on: November 9, 2013
Arabidopsis G1 cell cycle proteins undergo proteasome-dependent degradation during sucrose starvation
Hiroto Hirano1, Atsuhiko Shinmyo, Masami Sekine
1Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0101, Japan.
Abstract:
Although sucrose availability is crucial for commitment to plant cell division during G1 phase, it has remained uncertain how protein levels of core cell cycle genes are regulated. We found that Arabidopsis retinoblastoma-related protein1 (AtRBR1) and three E2F proteins were degraded under limited sucrose conditions, while protein abundance increased in response to treatment with the proteasome inhibitor MG132. We conclude that Arabidopsis key cell cycle proteins are degraded in a proteasome-dependent manner during sucrose starvation in Arabidopsis suspension MM2d cells.
Related Concept Videos
Negative Regulator Molecules
The Cell Cycle Control System
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
Cells Coordinate Growth and Proliferation
DNA Damage can Stall the Cell Cycle
DNA Damage Can Stall the Cell Cycle
Inhibition of Cdk Activity

