Amyloplasts are specialized organelles found in plant cells that store starch, a vital energy source. They are a type of plastid, which are organelles responsible for the synthesis and storage of various compounds. Amyloplasts convert glucose into starch and can later break it down when the plant needs energy. These organelles are typically found in non-photosynthetic tissues, such as roots and tubers, where they play a crucial role in energy storage. When the plant requires energy, amyloplasts can convert stored starch back into glucose, providing the necessary fuel for growth and development.