Explain the types of Plastids in brief.
Answers
Answer:
Types of Plastids
Chloroplasts.
Chromoplasts.
Gerontoplasts.
Leucoplasts.
Explanation:
Plastid is a membrane-bound organelle found in the cell of plants, algae and few eukaryotic cells.
It the site of production and storage of important chemical compounds which are used by the cells of autotrophic organisms.
They contain pigments which are used in photosynthesis and the types of pigments determine the cell's colour.
The types of plastids are-
1) Chloroplasts:- are the green plastids which contain chlorophyll pigments for photosynthesis.
2) Chromoplasts:- are the coloured plastids for pigment synthesis and storage.
The pigment present in them is carotene which gives a different colour to fruits and flowers.
3) Gerontoplasts:- are the chloroplasts that are going through the ageing process.
These are present in the leaves in which no more photosynthesis occurs (such as in the fall months).
4) Leucoplasts: are the colourless plastids for monoterpene synthesis found in non- photosynthetic parts of the plants.
They are of three types:-
a) Amyloplasts- stores starch.
b) Proteinoplasts- stores proteins.
c) Elaioplasts- stores fats and oils.
Required Answer:-
Types of Plastids:
- a) Chloroplasts
- b) Chromoplasts
- c) Gerontoplasts
- d) Leucoplasts
a) Chloroplasts:
➨ Chloroplasts are double membrane bound organelle found in mesophyll of the plant cell.
b) Chromoplasts:
➨ Chromoplasts are plastics which are found mainly in angiosperms, ageing leaves.
c) Gerontoplasts:
➨ Gerontoplasts are commonly chloroplasts which goes with ageing process.
d) Leucoplasts:
➨ Leucoplasts are colourless organelle which are found in parts of the plants like roots.