To answer the challenge of producing renewable, sustainable alternative fuels, researchers aren’t just looking at developing candidate bioenergy crops but are also reviewing other natural sources of energy-dense oils such as fungi. To learn more about how bacteria interact with fungi in a symbiotic relationship to support the biochemistries that could contribute to the development of alternate fuel sources, Cornell and DOE JGI researchers used a model bacterial-fungal system to reveal the mechanism for lipid production in oil-producing or oleaginous fungi.