Plastids

Plastids are double membraned organelles (having 2 membranes) and are found only in plant cells . 

These are responsible for:

•  Manufacturing and storing food in the plant.
•  Plastids called leucoplasts manufacture and  store starch , oils and proteins needed by the plant.
• Chloroplast is also a type of plastid.
• It contains the green colour pigment called chlorophyll that gives leaves their green colour. It also contains pigments of other colours such as red, yellow and orange .
• Therefore the colours of all leaves and plants we see around us are because of the organelles, plastids.