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. 2019 Jan 22;179(4):1479–1485. doi: 10.1104/pp.18.01493

Figure 5.

Figure 5.

Hypothetical overview of the progression of PSI photoinhibition in plant leaves. Stoichiometric quantity of photochemically active PSI decreases with the degree of PSI photoinhibition. As PSI photoinhibition progresses, P700 oxidation is not maintained, which is the turning point between first and second degree PSI photoinhibition.