More Magic Mushrooms?

 

More Magic Mushrooms?

Kylee French

BIOL-2110-001 - GENETICS Professor Guy F. Barbato October 20, 2025

    Psilocybin is a psychedelic drug that is produced in mushrooms, and there is no real need for mushrooms to produce this compound. Or is there? This trait was apparently so beneficial for mushrooms that it evolved in two distantly related types of mushrooms. One part that shows these mushrooms are distantly related is their different lifestyles. Psilocybe mushrooms thrive on decaying material such as decomposing organic matter or cow dung. Inocybe mushrooms are symbiotic organisms that form intimate, mutually beneficial relationships with trees. The article "How Psychedelic Mushrooms Evolved Their Magic", explains how these two separate groups of mushrooms independently evolved the ability to produce psilocybin, a powerful psychedelic compound. Surprisingly, they use completely different genetic and biochemical pathways to create the same molecule, demonstrating nature’s multiple solutions to the same problem. The article quotes the process by stating, "Psilocybe and Inocybe both use the same amino acid starting point to produce psilocybin. But from there, the mushrooms follow separate road maps of genes and enzymes. Midway through, they meet at an intermediate molecular point before parting ways once again — only to converge on a shared end product" (Nuwer, 2025). This study not only provides insight into fungal evolution but also opens new possibilities for synthesizing psilocybin for research and therapeutic purposes.

    In addition, I find this article revolutionary because it shifts our perspective on psilocybin. While we often think of it simply as a psychedelic drug, the research shows it can now be studied through genetics for its potential benefits. Interestingly, in 1958, Albert Hofmann, the Swiss chemist who discovered LSD, became the first researcher to isolate psilocybin from Psilocybe mushrooms, even though at the time it was primarily used as a drug rather than for scientific study. Now that we know the compound is produced independently by two separate mushroom species, it suggests that psilocybin serves an important biological function. This discovery also points to possible new methods for synthesizing psilocybin, which could greatly expand our knowledge of its effects on the brain, its potential therapeutic uses, and how genetic pathways create bioactive compounds.

References

Nuwer, R. (2025, October 18). How Psychedelic Mushrooms Evolved Their Magic. New York Times. Retrieved October 20, 2025, from https://www.nytimes.com/2025/10/18/science/how-psychedelic-mushrooms-evolved-their-magic.html

Temperature Dependent Sex Determination

   What if you could hop in a sauna or chill out in an igloo to determine the gender of your child? Well, in the near future, temperature dependent sex determination will probably never happen for humans. While science may be making leaps and bounds, we mammals determine sex through genotypic sex determination (1). This means that sex is determined by genetic factors such as chromosomes and various hormones, typically predetermined at conception (2). However, during a certain period of embryonic development, the sex of most reptiles are influenced by environmental factors such as temperature and humidity. Examples of reptiles that have this mechanism, are turtles, alligators, lizards and a majority of other reptilian species, snakes being one of the few exceptions. Furthermore, in the case of turtles, "cooler nests hatch as all males, and eggs from warmer nests hatch as all females" (1).  What was most interesting to me was that there is an enzyme called aromatase that can convert sex steroids, ultimately affecting the sex of the hatchling. At low levels of aromatase, a male is produced and at high levels, a female is developed. Therefore, it would make sense then that the temperature is what is influencing the presence of this enzyme. While researchers are familiar with this concept now, a new area of focus is whether if both mechanisms for sex determination could be acting concurrently. Could there be a reptile that has sex chromosomes and could be influenced by the temperature? Researchers believe it is plausible especially after observing the Australian skink lizard. This type of species is said to have sex chromosomes, yet at low temperatures, an XX individual could appear phenotypically as a male (1).

   Although this does not have huge implications for humans, it helps us to better understand our environment. I think the next step may be piecing together how this affected evolution and even how it was selected for to begin with. The data from this type of study may not save lives but it would be fascinating to learn more about this natural occurrence.