How do roots and seeds get energy?

Plants absorb water from the ground up through their roots. During photosynthesis, the energy from the sun splits the water molecules into hydrogen and oxygen. The oxygen molecules are given off by the plant and emitted into the atmosphere. Molecules of ATP are created within the plant cell. Seeds are their own energy source, a plant in embryo form. They store energy in a form that is released and used only when water, oxygen, soil, and a close-to-ideal temperature are a part of their surroundings. Until then, they remain dormant. Germination inhibitors are part of the make-up of every seed.