Researchers studied how to grow seven rare and endangered wood-dwelling mushrooms in the laboratory, which is important for saving these species from extinction. They tested different growing conditions including adding sawdust to growth media, adjusting temperatures, adding vermiculite to grain-based substrates, and using different types of wood. The study found that simple and inexpensive modifications like using birch wood and adding vermiculite significantly improved mushroom growth, making conservation and commercial cultivation more practical and affordable.