The Moment Symmetry Breaks: Spatiotemporal Dynamics of CYCLOIDEA Expression During Early Floral Development.

ABSTRACT: The establishment of bilateral symmetry in flowers depends on the precise regulation of CYCLOIDEA (CYC) gene expression along the dorsal-ventral axis. Although auxin and BLADE-ON-PETIOLE (BOP) have been implicated as regulators of CYC, when, where, and how they affect CYC expression remains unclear. Here, we combined transgenic manipulation and fluorescent confocal imaging to capture the spatiotemporal dynamics of the Mimulus parishii CYC genes (MpCYC2a and MpCYC2b) in relation to FM growth and auxin activity maxima in both wild type (WT) and bop mutants (mpbop). Strikingly, MpCYCs have already gained dorsal expression in the FM prior to any detectable auxin maxima, and no difference in MpCYC express

SUBMITTER: Min Y 

PROVIDER: S-EPMC12340783 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature