Gibberellins Play an Essential Role in the Bud Growth of Petunia hybrida.

ABSTRACT: This study delves into the role of gibberellin (GA) in governing plant branch development, a process that remains incompletely understood. Through a combination of exogenous hormone treatment, gene expression analysis, and transgenic phenotype investigations, the impact of GA on petunia's branch development was explored. The results showed that GA₃ alone did not directly induce axillary bud germination. However, paclobutrazol (PAC), an inhibitor of GA synthesis, effectively inhibited bud growth. Interestingly, the simultaneous application of GA₃ and 6-BA significantly promoted bud growth in both intact and decapitated plants compared to using 6-BA alone. Moreover, this study observed a significant downregulation of GA synthesis genes, including GA20ox1, GA20

SUBMITTER: Deng J 

PROVIDER: S-EPMC11430761 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature