process of photophosphorylatio n

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photophosphorylation takes place in thylakoid membrane.peter mitchel gave the chemosmotic hypothesis.In this process ADP+Pi gets converted into ATP.In presence of light proton motive force generates in thylakoid membrane that is one of main cause behind this phenomenon. proton motive force generates because of reason mentioned below-

pH gradient/proton gradient- In the lumen surface proton is higher i.e,pH acidic and to the stromal surface proton less thus pH is alkaline.this creates Proton motive force.

thylakoid membrane is impermeable to H+ ions,the proton diffuses through ATP synthase enzyme  this cause activation of the enzyme and ultimately ATP synthesis takes place.

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