The endosperm or endosperm is nutritional tissue formed in the embryo SAC of plants with seed; It is triploid ( with three sets of chromosomes ) and it can be used as a source of nutrients for the embryo during germination. It is composed of very tight cells and embedded in a matrix of starch granules, much of this is protein.The endosperm is a deposit of food for the embryo from the seeds of various Angiosperm plants.
