Psychoactive plant- and mushroom-associated alkaloids from two behavior modifying cicada pathogens

Entomopathogenic fungi routinely kill their hosts before releasing infectious conidia, but select species keep their hosts alive while sporulating to enhance spore dispersal. Recent expression and metabolomics studies involving host-killing entomopathogens have helped unravel infection processes and host responses, yet the mechanisms underlying active host transmission in insects with Entomophthoralean fungal infections are completely unexplored. Here we report the discovery, through global and targeted metabolomics supported by metagenomics and proteomics, of the plant amphetamine, cathinone, in Massospora cicadina -infected periodical cicadas, and the mushroom tryptamine, psilocybin, in M. platypediae - and M. levispora -infected annual cicadas. The neurogenic activities of these alkaloids provide a hypothetical framework for a chemically induced extended phenotype of Massospora that alters cicada behavior by increasing endurance and suppressing feeding prior to death.

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