Fuente: WIPO "tomato" Provided are methods and compositions for enhancing biomass, particularly shoot biomass and/or root biomass, and/or seed size in plants, by reducing expression and/or activity of GROOT1, GROOT2, and/or GROOT3 in plants. Also provided are plants and seeds generated using these methods. In some examples, reducing expression and/or activity includes introducing one or more exogenous nucleic acid molecules into a plant, plant part, or plant cell, thereby generating a transformed plant, plant part, or plant cell, wherein the one or more exogenous nucleic acid molecules reduce expression and/or activity of one or more of GROOT1, GROOT2, and GROOT3.