Phytohormone Signaling

Phytohormone signaling encompasses the biochemical pathways through which cannabis plants regulate growth, stress response, and reproductive development via endogenous signaling molecules. Key phytohormones include auxins, gibberellins, cytokinins, abscisic acid (ABA), and ethylene—each triggering cascading cellular responses that influence morphology and secondary metabolite production. Breeders and cultivators study phytohormone expression to understand how genetic backgrounds respond to light, temperature, and nutrient stress. Lineage records increasingly document differences in hormone-responsive traits across cultivar families, as these pathways directly affect flowering time, branching architecture, and resin gland development. Research into phytohormone genetics remains foundational for developing cultivars with predictable responses to environmental conditions.

Breeders select for stable phytohormone signaling to achieve consistent plant architecture, flowering phenology, and stress resilience across generations. Understanding hormone-gene interactions helps stabilize traits like node density, apical dominance, and early/late flowering tendency without relying solely on photoperiod cues.