THRIVING ON RADIATION. “Radiotropism is a term used to describe the growth of fungi from exposure to radionuclides. Most radionuclides emit beta (electrons and positrons) and gamma (photons) radiation and studies have shown that exposure to both sources promoted directional growth of fungi. Exposure to 121Sn and 137Cs sources showed that the spore germination in species increased considerably, a phenomenon also known as ‘radiostimulation’.”
https://royalsocietypublishing.org/doi/10.1098/rsif.2016.0459