Glomus iranicum var. tenuihypharum: A Remarkable Mycorrhizal Fungus
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Glomus iranicum var. tenuihypharum is a unique endomycorrhizal fungus that forms a symbiotic relationship with crops, enhancing nutrient uptake, water absorption, and plant resilience. This strain has been studied for its exceptional performance in intensive agricultural systems and its contribution to sustainable farming practices.
Discovery and scientific background
Glomus iranicum var. tenuihypharum was discovered in an unexpected and extreme environment: a saline wetland in the Murcia region of Spain. In this tough environment, high salt levels make it hard for most living things to survive. However, researchers noticed a strong plant called Limonium that was thriving there.
Scientists were curious about how this plant survived such harsh conditions. They examined its root system and found a remarkable symbiotic relationship. Attached to the roots was an arbuscular mycorrhizal fungus whose hyphae — filamentous structures that function like the fungus’ root system — remained unaffected by the salinity. These hyphae continued to absorb water and nutrients from the soil and exchanged them with the plant in return for carbohydrates produced through photosynthesis.
This discovery marked the beginning of extensive scientific research. The fungus underwent molecular characterization, ecological assessments, and rigorous field trials. Comparative studies revealed its superior performance under stress conditions when compared to other mycorrhizal fungi. Its ability to thrive in saline and nutrient-rich environments, while supporting plant health and productivity, led to its classification as a highly valuable strain.
What makes this fungus unique?
Abundant extramatrical mycelium: Glomus iranicum var. tenuihypharum produces up to 4x more of these structures than other fungi, dramatically increasing soil exploration and nutrient transport. For every meter of root, the fungus can produce between 7 and 250 meters of exploratory hyphae, enhancing nutrient and water transport.
External sporulation: In comparison to many other fungi that sporulate inside the root, G. iranicum var. tenuihypharum forms tiny external spores (30 microns on average, compared to the usual 100–200 microns). This prevents obstructions and disruption of root continuity, reducing the plant’s energy expenditure on root regeneration.
High salinity and fertilizer tolerance: Capable of thriving in intensive input conditions, this fungus maintains performance even in saline soils or under heavy fertilization — conditions that typically inhibit other mycorrhizal fungi.
Glomalin production: This fungus produces glomalin, a glycoprotein that improves soil structure by forming stable aggregates, enhancing aeration, water retention, and microbial activity.
Benefits for crops
This mycorrhizal fungus penetrates the cells of new plant roots and forms arbuscules, specialized structures that facilitate the exchange of nutrients. In exchange for sugars produced through photosynthesis, the fungus supplies the plant with essential nutrients such as phosphorus, nitrogen, calcium, microelements and water. These mycorrhizal associations are not only fascinating from a biological point of view, but also have practical applications for sustainable agriculture production, which may include:
- Higher and more uniform yields: Enhanced nutrient uptake leads to better productivity and consistency across growing cycles.
- Improved fruit quality: Crops show better size, color, and overall quality desired by commercial markets.
- Enhanced soil health: Improved physical, chemical, and biological properties of soil help promote long-term fertility.
- Increased abiotic stress tolerance: Plants become more resilient to drought, salinity, and temperature extremes.
- Boosted photosynthesis and root growth: The fungus stimulates root development and photosynthetic activity, increasing CO₂ capture, water-use efficiency, and nutrient-use efficiency.
Ready to take the next step?
Whether you're managing high-input systems or transitioning to regenerative agriculture, Glomus iranicum var. tenuihypharum offers a proven, natural solution. Its unique biology and field-tested benefits make it a cornerstone of next-generation agricultural practices.
Interested in learning more or trying it out? Reach out to our team to explore tailored solutions for your crops and growing conditions.
Many factors contribute to crop performance and return on investment. Products are intended to complement sound agronomic practices. Results may vary.