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Mechanism of Photodamage of the Oxygen Evolving Mn Cluster of Photosystem II by Excessive Light Energy

Zavafer, Alonso; Koinuma, Wataru; Chow, Wah Soon; Cheah, Mun Hon; Mino, Hiroyuki


Photodamage to Photosystem II (PSII) has been attributed either to excessive excitation of photosynthetic pigments or by direct of light absorption by Mn4CaO5 cluster. Here we investigated the time course of PSII photodamage and release of Mn in PSII-enriched membranes under high light illumination at 460nm and 660nm. We found that the loss of PSII activity, assayed by chlorophyll fuorescence, is faster than release of Mn from the Mn4CaO5 cluster, assayed by EPR. Loss of PSII activity and Mn...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: Scientific Reports
DOI: 10.1038/s41598-017-07671-1
Access Rights: Open Access


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