• Plastids are organelles found in all plant cells and in euglenoides. 
  • They are easily observable under a microscope due to their relatively large size. 
  • Plastids are responsible for imparting specific colors to plants, and they contain various pigments. 
  • Types of Plastids:

Plastids can be classified into three main types based on the type of pigments they contain:

1. Chloroplasts:

- These plastids contain pigments like chlorophyll and carotenoids, which are essential for capturing light energy required for photosynthesis. 

2. Chromoplasts:

- Chromoplasts contain fat-soluble carotenoid pigments, such as carotene and xanthophylls, which give plant parts their yellow, orange, or red colors. 

3. Leucoplasts:

- Leucoplasts are colorless plastids of various shapes and sizes that store different types of nutrients.

- Amyloplasts store carbohydrates (e.g., starch, found in potatoes), elaioplasts store oils and fats, and aleuroplasts store proteins.