Recently, genome of Laccaria Bicolor (an ectomycorrhizal fungi) was sequenced. Which of the following kinds of relationship does it form with plants?

The relationship between Laccaria Bicolor and plants can be described as mutualism. Laccaria Bicolor shows an excess of enzymes used in ammonia uptake and a lack of enzymes that would be needed to degrade plant wall material. Thus, the fungus provides nitrogen and does not cause any harm to the trees in return for glucose, which it gets from photosynthetic plants.