Reactive Oxygen Species

Reactive Oxygen Species (ROS) are not terpenes, but rather unstable molecular byproducts generated during cannabis plant metabolism, particularly under stress conditions such as high light, temperature fluctuations, or nutrient imbalance. ROS include superoxide radicals, hydrogen peroxide, and hydroxyl radicals that can damage cellular structures if left unmanaged. Cannabis plants have evolved enzymatic defense systems—including superoxide dismutase and catalase—to neutralize excess ROS and maintain cellular integrity. Understanding ROS dynamics is relevant to cultivation science because stress-induced ROS accumulation can trigger secondary metabolite production, including cannabinoid and terpene biosynthesis. Breeders studying resilience and secondary metabolite expression sometimes monitor ROS levels as an indirect marker of plant vigor and chemical output.

Breeders working on stress-resilient cultivars and enhanced secondary metabolite production monitor ROS regulation as a physiological indicator. Lines showing balanced ROS management often correlate with stable cannabinoid expression and terpene diversity across environmental conditions.