Are the different types of plastids interchangeable ? If yes, give examples where they are getting converted from one type to another.

Explanation

Yes. Plastids are inter changeable in form. Generally three types of plastids are present in plant cells namely, feucoplasts (storage), chromoplasts (coloured, attraction) and chloroplasts (synthesis of food). Chromoplasts are coloured plastids (orange, yellow or red), occurs in the cells of petals, fruits etc. They contains less chlorophylls and more carotenes (orange) or (red) xanthophylls (yellow). The red colour of tomato is due to the presence of lycopene in the chronioplasts. The chromoplasts of red algae contain phycocyanin and phycoerythrin. The chromoplasts of Brown algae contain fucoxanthin.
Depending upon circumstances, one type of plastid may be converted into another type.
For Ex :
1) The leucoplasts in stem tubers of potato, on exposure to sunlight transform into chloroplasts.
2) In capsicum, the cells of ovary consists of leucoplasts. When ovary changes into fruit, leucoplasts are transformed into chloroplasts. When the fruit ripens chloroplasts are changed into chromoplasts.