How do dyras help spruce trees grow?

Dyras, specifically the fungi known as mycorrhizae, form symbiotic relationships with spruce trees by attaching to their roots. This partnership enhances the tree's ability to absorb water and essential nutrients, particularly phosphorus, from the soil. In return, the spruce tree provides the fungi with carbohydrates produced through photosynthesis. This mutualistic relationship ultimately promotes healthier growth and resilience in spruce trees.