1 Iritis is uncommon, but can be due to trauma, infections, or autoimmune conditions. Symptoms include pain, red eye, and often, decreased vision.  Optic neuritis. The nerve travelling from the back of the eyeball into the brain can become inflamed.
Oak root fungus, or white rot, is a widespread disease that becomes visible just beneath the bark and on roots. What looks like layers of light brown to tan mushrooms form in clusters at the base of the trees.
1 Some fungi are parasitic, causing serious damage to their host (a few examples are given below). 2  Some fungi are both. 3  Metarhizium robertsii is a soil fungus that lives symbiotically with plants but parasitizes (and kills) soil insects. 4  Its hyphae penetrate both the roots of the plant and the corpse of the insect.scomycetes (Phylum Ascomycota). 1  asexual spores called conidia. 2  ascospores produced following sexual reproduction. 3  Four or eight ascospores develop inside a saclike ascus (the group is commonly called sac fungi). 4  Saccharomyces cerevisiae one of the budding yeasts.