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The Bromeliaceae family is one of the most morphologically diverse families with a pantropical distribution. To schedule an appropriate flowering time for bromeliads, ethylene is commonly used to initiate flower development in adult plants. However, the mechanism by which ethylene induces flowering in adult bromeliads remains unknown. Here, we identified an  APETALA2  ( AP2 )-like gene,  AfAP2-1 , in  Aechmea fasciata . AfAP2-1 contains two AP2 domains and is a nuclear-localized protein. It functions as a transcriptional activator, and the activation domain is located in the C-terminal region. The expression level of  AfAP2-1  is higher in juvenile plants than in adult plants, and the  AfAP2-1  transcript level was rapidly and transiently reduced in plants treated with exogenous ethylene. Overexpression of  AfAP2-1  in  Arabidopsis thaliana  results in an extremely delayed flowering phenotype. These results suggested that  AfAP2-1  responds to ethylene and is a putative age-dependent flowering regulator in  A. fasciata .

AfAP2-1, An Age-Dependent Gene of Aechmea fasciata, Responds to Exogenous Ethylene Treatment