What are plastids? what are the different kinds of plastids and their functions?

Plastids are the cytoplasmic organelles found only in the plant cells and certain micro organisms
Plastids are of following three types based on the pigment present:
i)Chloroplast: These are green plastids containing chloroplast pigment. It captures light energy and carry out photosynthesis.
ii)Chromoplast: These are coloured plastids containing other than green pigment responsible for brightley coloured flowers, fruits etc.
iii)Luecoplast:: These are colourless plastids. They have no pigment, it perform functions of food storage.

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