Clearly, pairing this and other endophytes with agricultural crops can increase yield, decrease disease, and reduce the need for fertilizers and insecticides.
I believe fungi have evolved to support habitats over the long term, protecting generations hundreds of years into the future. Saprophytic mushrooms gobble up debris fallen from the trees and prevent invasion by parasites. The mycorrhizae channel nutrients, expand root zones, and guard against parasites. Similarly, endophytic fungi, less well understood, chemically repel bacteria, insects, and other fungi.
A variety of forms of mycelial mats can prevent downstream pollution. I am keen on using bunker spawn—mycelium in burlap sacks—to build mycelial buffers to capture microbes and nutrients. This subject is discussed in greater detail here.
A couple of saprophytic mushroom species I have found to promote the growth of several crops are the garden giant (Stropharia rugoso annulata) and the elm oyster (Hypsizygus ulmarius). See chapter 12 for information on incorporating these mushrooms using companion planting strategies.