Various types of pigments that are essential for photosynthesis

1. PHOTOSYNTHETIC
PIGMENTS
Presented by
Pavithra B R
BSc Microbiology

2. INTRODUCTION
• Raw materials
H2O & CO2
• Sunlight
• Pigments
Photosynthesis

3. PHOTOSYNTHETIC PIGMENTS
Carotenoids
Phycobilins
CHLOROPHYLL
Chlorophyll a
Chlorophyll b
Chlorophyll c
Chlorophyll d
Chlorophyll e
Bacterio chlorophyll
Bacterio viridin

4. CHLOROPHYLL

5. Chlorophyll a Chlorophyll b
R position – Methyl group R position – Aldehyde group
Colour – Bluish green Colour – Olive green
In reflected light, red In reflected light, brownish red
In transmitted light, bright green In transmitted light, yellowish green

6. Mg
N
N
N
N
|
C
|
C
|
C
|
C
|
C
|
I II
III
IV
V
1
2 3
4
5
6
7
8
9
10
Ring I to IV – Pyrrole Ring
Ring V – Cyclo-pentanone Ring
Porphyrin
Head
or
Tetra Pyloric
Head
R Position
20 Carbon atoms
Phytol Side Chain
or
Phytol Tail
STRUCTURE

7. CAROTENOIDS
CAROTENE XANTHOPHYLL
C40H56 C40H56O2
Orange Red Pigment Yellowish Brown Pigment
Ex: Fucoxanthin
Leutine

8. PHYCOBILINS
Predominantly found in
blue-green algae
Two types:
1. Phycocyanin –
Purple pigment
2. Phycoerythrin –
Red pigment
No Magnesium
No Phytol Chain or Side
Chain

9. Chlorophyll a
Reaction Centre
Chlorophyll
Chlorophyll
Carotenoids
Phycobilins
Chlorophyll a, Chlorophyll b, Chlorophyll c,
Chlorophyll d, Chlorophyll e, Bacterio chlorophyll,
Bacterio viridin
Carotene, Xanthophyll
Phycocyanin, Phycoerythrin
Other Pigments
(Chlorophyll b, c, d, e, carotene,
xanthophyll, phycocyanin, phycoerythrin)
Acessory Pigments
or
Helping Pigments

10. REFERENCE
Websites
• https://ucmp.berkeley.edu/glossary/gloss3/pigments.html
• https://passel2.unl.edu/view/lesson/920a6340a995/2
YouTube
• https://www.youtube.com/watch?v=Sxj63Bijmy4&t=64s

11. THANK YOU