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Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

e-Life. 2016-09; 
Geoffry A Davis1,2, Atsuko Kanazawa1,3, Mark Aurel Scho¨ ttler4 , Kaori Kohzuma1† , John E Froehlich1 , A William Rutherford5 , Mio Satoh-Cruz1 , Deepika Minhas6 , Stefanie Tietz1 , Amit Dhingra6 , David M Kramer
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Mutagenesis Services 01. The third mutagenesis approach involved swapping of target domains (delete swaps) using synthetic gene fragments synthesized at GenScript USA (Supplementary fi Get A Quote

摘要

The thylakoid proton motive force (pmf) generated during photosynthesis is the essential driving force for ATP production; it is also a central regulator of light capture and electron transfer. We investigated the effects of elevated pmf on photosynthesis in a library of Arabidopsis thaliana mutants with altered rates of thylakoid lumen proton efflux, leading to a range of steadystate pmf extents. We observed the expected pmf-dependent alterations in photosynthetic regulation, but also strong effects on the rate of photosystem II (PSII) photodamage. Detailed analyses indicate this effect is related to an elevated electric field (D ) component of the pmf, rather than lumen acidification, which in vivo increased ... More

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