The impact of plastid size change in both monocot and dicot plants has been examined. In both, when plastid size is increased there is an increase in biomass relative to the parental lines. Thus, provided herein are methods for increasing the biomass of a plant, comprising decreasing the expression of at least one plastid division protein in a plant. Optionally, the level of chlorophyll in the plant is also reduced.
GOVERNMENT RIGHTS STATEMENT
 This invention was made with government support under contract number DE-AR0000206 awarded by the United States Department of Energy. The government has certain rights in the invention.