The Arabidopsis plant on the right has been modified by altering the expression of regulatory genes controlling growth.
Credit or Source: Mendel Biotechnology
U.S. DOE. 2006. Breaking the Biological Barriers to Cellulosic Ethanol: A Joint Research Agenda, DOE/SC/EE-0095, U.S. Department of Energy Office of Science and Office of Energy Efficiency and Renewable Energy. (p. 65) (website)