Senescence Linked Metabolism

Senescence-linked metabolism refers to biochemical shifts that occur as cannabis plants enter late flowering and post-harvest phases, characterized by chlorophyll breakdown and accumulation of secondary metabolites. During this period, plants redirect nitrogen and other mobile nutrients from vegetative tissues, triggering production of pigments, terpenes, and cannabinoid precursors. These metabolic changes create distinctive aromatic profiles often described as earthy, spiced, or woody—compounds commonly associated with aged or cured cannabis. Breeders studying senescence-linked pathways seek to optimize terpene and cannabinoid expression in the final flowering window. Understanding this metabolic stage is essential for cultivation timing and post-harvest processing protocols.

Breeders working in this category focus on genotypes that express desirable secondary metabolites during senescence, particularly those that produce stable, complex aroma compounds. Selective pressure on late-stage metabolic efficiency can influence final terpene ratios and phenotypic color expression in finished flower.