Raoultella planticola was a bacteria.
In 2017, Agrofuel Research Operations genetically modified an sample of the bacteria using the enzyme EC 31.
The bacteria produced ethanol, which filled the greenhouse, as well as the lab. (TV: The Pyramid at the End of the World)
Behind the scenes
Although the complete name of the bacteria is not given on-screen, the name "R. planticola" can be seen on the screen of Agrofuel's computer.