Sucrose induces flowering by degradation of the floral repressor Ghd7 via K48-linked polyubiquitination in rice.

ABSTRACT: Sucrose functions as a signaling molecule in several metabolic pathways as well as in various developmental processes. However, the molecular mechanisms by which sucrose regulates these processes remain largely unknown. In the present study, we demonstrate that sucrose promotes flowering by mediating the stability of a regulatory protein that represses flowering in rice. Exogenous application of sucrose promoted flowering by inducing florigen gene expression. Reduction of sucrose levels in the phloem through genetic modifications, such as the overexpression of the vacuolar invertase OsVIN2 or the mutation of OsSUT2, a sucrose transporter, delayed flowering. Analysis of relative transcript levels of floral regulatory genes showed that sucrose activated Ehd1 upstream of the florigen, with no

SUBMITTER: Cho LH 

PROVIDER: S-EPMC11622536 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature