short notes on plastids
Answers
Plastids is a cell organelle found only in plant cells.
It is of three types.
1- Chloroplast -> The plastid which contain chlorophyll and is green in colour.
2- Chromoplast-> It is a coloured plastid other than green . It gives the colour to flowers.
3-Leucoplast -> It is a colourless plastids.
★ PLASTIDS:-
→ Plastids are found in all plant cells and in euglenoides.
→ Large sized. Easily observable under the microscope.
→ They contain some pigments.
→ Based on the type of pigments, plastids are 3 types:-
o Chloroplasts: Contain chlorophyll and carotenoid pigments. They trap light energy for photosynthesis.
o Chromoplasts: Contain fat soluble carotenoid pigments like carotene, xanthophylls etc. This gives a yellow, orange or red colour.
o Leucoplasts: These are colourless plastids of varied shapes and sizes with stored nutrients. They include:-
→ Amyloplasts: Store starch. E.g. potato.
→ Elaioplasts: Store oils and fats.
→ Aleuroplasts: Store proteins.