Genome-Wide Characterization of Gibberellin Oxidase Genes (<i>GbGAoxs</i>) and Illustration of Their Molecular Responses to Exogenous GA₃ in <i>Gossypium barbadense</i>.

ABSTRACT: As key enzymes in the gibberellin (GA) biosynthesis pathway, GAoxs function as regulators of bioactive GA levels and plant architecture, yet little is understood about GAoxs in Gossypium. In this study, 78 GAox genes identified in four cotton species were divided into three subgroups: GA2ox, GA3ox, and GA20ox. Syntenic relationships of GAoxs in Gossypium suggested that divergencies in gene function may be attributed to whole-genome duplication during evolution. Cis-acting element analysis suggested that the GbGAox genes might participate in plant growth, development, and hormone responses. Moreover, transcriptome analysis was performed to characterize the molecular response of the exogenous GA₃ application. It was found that DEGs (differentiall

SUBMITTER: Zhou Z 

PROVIDER: S-EPMC11899772 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature