I prodotti Okyspor are based on Mycorrhizae. Mycorrhizae are symbiotic unions between soil fungi and non-lignified plant roots. Endomycorrhizae are arbuscular mycorrhizal fungi, which settle on the cortical part of the root, penetrating its cells and filling the intercellular spaces without ever invading the central cylinder. Within the cells, they can form oval structures called vesicles and branched structures called arbuscules.