Greek word Leuco means colorless. Colorless plastids are called leucoplasts. In presence of light it can transform into chromoplast or chloroplast. It can be semicircular, rectangular or cylindrical in shape. Leucoplasts are found in plant roots, lower stems, seeds, dividing tissues, gametes etc. Polytoma algae contain leucoplasts. There are three types of leucoplasts. These are-
(i) Amyloplast : The leucoplasts that store starchy food are called amyloplasts. Amyloplasts are present in plants like rice, wheat, potato, bhutra, barley, cown etc.
(ii) Elioplast: The leucoplasts that store fatty food are called elaioplasts. Plants like mustard, coconut, Chinese almond, soybean, linseed etc. contain elaioplast.
(iii) Aleuroplast: All leucoplasts that store protein food are called aleuroplast or proteinoplast. Chickpeas, peas, kesari and lentils contain aleuroplasts.