Forum libero

e di studi si e' finalmente scoperto che non sono solo due i partner di quella simbiosi, c'e' anche un lievito di mezzo.
fun factoid: e' proprio la simbiosi tra alghe e funghi nei licheni che ha dato origine all'impiego della parola simbiosi in biologia, sono sempre stati tre e non due, lol.

https://www.purdue.edu/newsroom/releases/2016/Q3/y...

For nearly 150 years, lichens have been the model organisms of symbiosis. Now researchers have uncovered an unexpected third partner embedded in the lichen cortex or "skin" - yeast.

Scientists have long recognized the fundamental partnership that produces lichens: A fungus joins with an alga or cyanobacteria in a relationship that benefits both individuals. In a study led by the University of Montana and co-authored by Purdue mycologist M. Catherine Aime, researchers show that lichens across six continents also contain basidiomycete yeasts, single-celled fungi that likely produce chemicals that help lichens ward off predators and repel microbes.

The finding could explain why many genetically similar lichens present wildly different physical features and why scientists have been unable to synthesize lichens in the laboratory, even when combining species that partner successfully in nature.