Pigment

Definition

Pigment is a substance that absorbs light and is responsible for the color of plants. In biological systems, pigments play a crucial role in capturing light energy for processes like photosynthesis.

5 Must Know Facts For Your Next Test

1. Chlorophyll is the primary pigment involved in photosynthesis, absorbing mainly blue and red wavelengths of light.
2. Carotenoids are accessory pigments that capture additional light energy and protect chlorophyll from damage.
3. Pigments are located within the thylakoid membranes of chloroplasts in plant cells.
4. The absorption spectrum of a pigment indicates the specific wavelengths of light it can absorb.
5. Different pigments allow plants to utilize a broader range of the light spectrum for photosynthesis.

Review Questions

• What are the main types of pigments involved in photosynthesis?
• Where within the cell are photosynthetic pigments found?
• How do carotenoids complement the function of chlorophyll in photosynthesis?

Related terms

Chlorophyll:

The primary pigment involved in photosynthesis, responsible for absorbing light energy.

Thylakoid:

A membrane-bound compartment inside chloroplasts where pigments are located and where the light-dependent reactions occur.

Carotenoids: Accessory pigments that capture additional light energy and protect chlorophyll by dissipating excess energy.