Plant Hormones And Signaling

Plant hormones and signaling pathways form the biochemical foundation of cannabis growth and development. These endogenous regulatory molecules—including auxins, gibberellins, cytokinins, ethylene, and abscisic acid—govern vegetative structure, flowering initiation, stress responses, and secondary metabolite accumulation. Cannabis breeders study hormone-responsive traits to understand how genetics control plant architecture, branching patterns, flowering speed, and terpene/cannabinoid expression. Signaling cascades activated by light, temperature, and nutrient availability directly influence phenotypic outcomes, making hormone science central to predictable breeding outcomes. Knowledge of these mechanisms helps breeders select for desirable structural and chemical profiles across generations.

Breeders working with hormone-related traits can identify lines with consistent flowering timing, compact or expansive growth habits, and robust stress tolerance. Understanding auxin and cytokinin ratios, for example, allows selection for specific branching architectures and yield patterns without relying solely on phenotypic observation.