Photoinhibition is defined as the light-induced loss of photosynthetic
activity and is an unavoidable consequence of light reactions
(Keren and Krieger-Liszkay, 2011). The molecular basis of photoinhibition
was studied from two main theories of donor side and
accepter side mechanisms and was still controversial about the precise
mechanism. However, both of proposed theories indicate that
the D1 protein of PSII is damaged during photoinhibition, and consequently
the PSII activity is reduced (Nixon et al., 2010).