Photosynthetic pigment

Definition

Photosynthetic pigments are molecules that absorb light energy and convert it into chemical energy during photosynthesis. They play a crucial role in capturing light at different wavelengths to drive the process of photosynthesis.

5 Must Know Facts For Your Next Test

1. Chlorophyll is the most common photosynthetic pigment found in plants, algae, and cyanobacteria.
2. Carotenoids are another class of photosynthetic pigments that protect chlorophyll from photo-damage by absorbing excess light.
3. Phycobilins are water-soluble pigments found in cyanobacteria and red algae, contributing to their blue-green and red colors respectively.
4. Different pigments absorb light at different wavelengths, optimizing the use of available light for photosynthesis.
5. The absorption spectrum of a pigment indicates the specific wavelengths of light it can absorb effectively.

Review Questions

• What is the primary role of photosynthetic pigments in photosynthesis?
• Name two types of photosynthetic pigments other than chlorophyll and describe their functions.
• Why is it important for an organism to have multiple types of photosynthetic pigments?

Related terms

Chlorophyll: A green pigment responsible for capturing light energy primarily in the blue and red wavelengths.

Carotenoids: Pigments that absorb blue and green light, providing photoprotection and contributing to orange and yellow colors.

Phycobilins: Pigments found in cyanobacteria and red algae that aid in capturing additional wavelengths of light not absorbed by chlorophyll.