Paraglomerales fungi

It is important to clarify: Paraglomerales are not a plant disease. They are an order of arbuscular mycorrhizal fungi (AMF) that live in a mutually beneficial symbiotic relationship with the roots of the vast majority of terrestrial plants. In agronomy, they are classified as beneficial soil microorganisms that enhance crop health and productivity rather than as pathogens.

These fungi do not act as disease agents. Instead, they colonize root cortical cells and form tree-like branching structures called arbuscules. These structures serve as the primary site for nutrient exchange, where the fungus delivers essential minerals like phosphorus and nitrogen to the plant in exchange for plant-derived sugars and lipids.

They establish symbiosis with a wide range of agricultural crops, including cereals, legumes, and vegetable species. The presence of these fungi is particularly advantageous for crops grown in soils with limited nutrient availability, as the extensive fungal network acts as an extension of the plant's root system, reaching far beyond the depletion zone.

Conditions favorable for their development include the presence of host plants, adequate soil moisture, and moderate levels of nutrients. High concentrations of readily available synthetic fertilizers, particularly phosphorus, can inhibit the colonization of roots by these beneficial fungi, as the plant becomes less reliant on the symbiont for nutrient acquisition.

Their agricultural importance is highly beneficial. Beyond nutrient supply, Paraglomerales contribute to soil structure stability by secreting glycoproteins like glomalin. This helps in soil aggregation, water retention, and carbon sequestration, which collectively enhance the resilience of the entire cropping system against environmental stressors.

• Increased uptake of phosphorus and micronutrients.
• Enhanced plant tolerance to drought and salinity.
• Improved soil structure and aggregation.
• Biological protection against soil-borne pathogens.