Arbuscular Mycorrhizae

Arbuscular mycorrhizae (AM) are symbiotic fungal associations found in the root systems of most vascular plants, including cannabis. These fungi form branching structures called arbuscules within root cells, facilitating nutrient exchange between the plant and soil ecosystem. In cannabis cultivation, AM colonization is commonly associated with improved phosphorus uptake, enhanced root development, and increased soil aggregation. Breeders and cultivators working with mycorrhizal-dependent genetics often report more efficient nutrient cycling in organic and living-soil systems. Understanding AM prevalence in different cannabis phenotypes helps inform substrate design and microbial inoculation strategies across breeding programs.

Cannabis genetics vary in their mycorrhizal responsiveness; some lineages show stronger AM colonization rates under specific soil conditions. Breeders developing cultivars for organic or regenerative systems often select for traits that correlate with robust mycorrhizal associations, particularly in cultivars destined for outdoor or living-soil environments.