Sunlight for photosynthesis

Sunlight for photosynthesis

1. The portion of light which is used in photosynthesis is called PAR (Photosynthetically Active Radiation) also called white light / visible light (400-700nm)

   • V
     • 400nm
   • I
   • B
   • G
     • least useful
   • Y
   • O
   • R
     • 700nm

2. Photosynthetic Pigments

   • CHLOROPHYLLS
     • TYPES OF CHLOROPHYLL: a, b, c, d, e, bacteriochlorophyll
       • a
         • universal photosynthetic pigment
         • more amount
           • b
     • absorb both low and high wavelength light and participate directly in light reaction of photosynthesis
   • CAROTENOIDS
     • xanthopheles
       • yellow to brown
     • carotenes
       • yellow to red
     • absorb only low wavelength light and hand over the absorbed energy to chlorophyll