Light Independent Reaction

• LIR occurs in the Stroma
• Carbon dioxide from atmosphere diffuses into the leaf through stomata into the stroma
• Carbon dioxide combines with RuBP using Ribulose to from 2 GP
• ATP and reduced NADP from the light dependent reaction are used to reduce GP into triose phosphate.
• Oxidised NADP returns to the LDR to be reduced.
• Some triose phosphate molecules are converted to glucose.
• Most triose phosphate molecules are used to regenerate RuBP using ATP from the LIR.
• Adaptations of chloroplasts for LIR

  Fluid from stroma contains all the necessary enzymes to carry out LIR (reduction of carbon dioxide)
• Adaptations of chloroplasts for LIR

  Stroma fluid surrounds the grana so products of the light dependent reaction in the grana can easily diffuse into the stroma.
• Adaptations of chloroplasts for LIR

  Contains both DNA and ribosomes so it can quickly and easily manufacture some of the proteins needed for LIR.