The lichen-forming fungus Xanthoria parietina would be the first lichen fungus to be sequenced. A lichen is an association between a fungus (usually an ascomycete) and either a microalga or a cyanobacterium, or both. Lichens are widely regarded as the classic example of a mutualistic symbiosis. Lichens grow in soil-less habitats such as on rocks … Continue reading Why Sequence Xanthoria parietina?