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Mycolaria: How can radiotrophic fungi symbiotically assist an animal species to mitigate effects of solar radiation?

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Mycolaria is my working name for an alien planet featuring a much more visible role for fungi of all kinds, large and small. There are also animals and plants on this world. This is the second in a series of fungi-related worldbuilding questions.

This particular mushroom related question is about radiotrophic fungi, which are able to make use of radiation via Melanin to power their own growth. These have been observed on earth, e.g. at Chernobyl.

I am looking for input on whether/how an animal species could enjoy a symbiotic relationship with radiotrophic fungi so that they can survive in a planetary environment which is afflicted by levels of surface radiation anywhere between 3 and 100 times that experienced on earth.

While an affirmative answer may well not be forthcoming, I am interested in biological issues surrounding this question.

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This post was sourced from https://worldbuilding.stackexchange.com/q/23893. It is licensed under CC BY-SA 3.0.

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