Non-cyclic photophosphorylation

The energy of P680+ is used in two steps to split a water molecule into 2H+ + 1/2 O2 + 2e- (photolysis or light-splitting). An electron from the water molecule reduces P680+ back to P680, while the H+ and oxygen are released.

Does cyclic photophosphorylation use water?

1 Cyclic and Noncyclic Photophosphorylation. Photophosphorylation is the conversion of ADP to ATP using the energy of sunlight by activation of PSII. This involves the splitting of the water molecule in oxygen and hydrogen protons (H+), a process known as photolysis.