This research examined how a common forest fungus called Fomitopsis pinicola breaks down different types of wood. Scientists found that this fungus much prefers coniferous trees like pine and is much better at degrading them than broadleaf trees like birch. By analyzing which genes the fungus turns on when degrading different woods, they discovered the fungus activates more genes related to breaking down the tough lignin component when working on pine wood, explaining why it naturally chooses conifers in forests.