Although, in this picture, the fungi would be mycorrhizae, which do form symbiotic relationships with plants. In fact, fungi enabled plant terrestrialization, i. e. we probably wouldn’t have trees in their current form without fungi.

https://www.austintexas.gov/blog/tree-roots-part-iii-mycorrhizae

I heavily recommend Entangled Life by Merlin Sheldrake, amazing and entertaining book.

https://www.merlinsheldrake.com/

Not affiliated in any way, but love mushrooms.