Some yeast species convert plant sugars into oils that can be used to make high-quality biodiesel. These Lipomyces tetrasporus yeast cells have large oil drops inside of them. (Patricia Slininger, D3923-1)
ARS geneticist Michael Casler harvests switchgrass seed in a program to develop high-yielding cultivars for bioenergy production. (Wolfgang Hoffmann, D764-1)