Origin and evolution of gibberellin signaling and metabolism in plants

Gibberellins modulate multiple aspects of plant behavior. The molecular mechanism by which these hormones are perceived and how this information is translated into transcriptional changes has been elucidated in vascular plants: gibberellins the nuclear receptor GID1, then interacts with DELLA proteins promote their degradation, resulting modification activity transcription factors DELLAs interact physically. However, several important questions still pending: does a single molecule perform such vast array functions along development? What property do add to behavior? A closer look at gibberellin action from an evolutionary perspective can help answer questions. conserved all land plants, predate emergence full metabolic pathway GID1 ancestor plants. origin signaling linked exaptation N-terminal domain DELLA, already acted as coactivator ancestral proteins. At least ability control growth seems be encoded protein too, suggesting that gibberellins’ functional diversity direct consequence activity. Finally, comparative network analysis suggests increases coordination responses, providing theoretical framework for role adaptation scale, further needs experimental testing.