Chlorophyll Metabolism

Chlorophyll metabolism encompasses the biochemical processes plants use to synthesize, maintain, and break down chlorophyll molecules—the primary pigments driving photosynthesis. In cannabis, active chlorophyll metabolism during vegetative growth supports robust plant development and nutrient uptake. However, the degradation of chlorophyll during late flowering and curing is responsible for the color transitions breeders observe: from green to gold, purple, or brown hues. This metabolic activity also influences the volatile compound profile, as senescence-related chemical shifts can alter aroma complexity. Understanding chlorophyll turnover helps cultivators and breeders predict harvest timing, pigmentation stability, and final terpene expression.

Breeders selecting for specific terminal colorations (purples, reds, golds) monitor chlorophyll breakdown patterns across late flower. Lines with rapid or delayed senescence show predictable aroma and pigment profiles, making chlorophyll metabolism a useful phenotypic marker for strain stabilization and consistency.