Polyphenol Oxidase Activity

Polyphenol oxidase (PPO) activity refers to enzymatic processes in cannabis tissue that catalyze the oxidation of phenolic compounds, often observed during curing, storage, and post-harvest processing. This enzymatic pathway is commonly associated with browning reactions and color changes in dried material. PPO activity levels vary significantly across genetic backgrounds and environmental conditions. Breeders and cultivators monitor PPO expression because it influences visual appeal, oxidative stability during storage, and the preservation of volatile compounds. Understanding PPO dynamics is relevant to lineage selection when color retention or resistance to degradation during cure is a breeding objective.

Breeders working with cultivars bred for extended storage stability or consistent post-harvest color often track PPO activity as a secondary trait. Lines with lower enzymatic activity under standard curing conditions may support preservation of chlorophyll and visual quality over longer shelf windows.