Overexpression of the Rieske FeS protein of the Cytochrome b6f complex increases C4 photosynthesis
bioRxiv, ISSN: 2692-8205
2019
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
C plants contribute 20% to the global primary productivity despite representing only 4% of higher plant species. Their CO concentrating mechanism operating between mesophyll and bundle sheath cells increases CO partial pressure at the site of Rubisco and hence photosynthetic efficiency. Electron transport chains in both cell types supply ATP and NADPH for C photosynthesis. Since Cytochrome bf is a key point of control of electron transport in C plants, we constitutively overexpressed the Rieske FeS subunit in Setaria viridis to study the effects on C photosynthesis. Rieske FeS overexpression resulted in a higher content of Cytochrome bf in both mesophyll and bundle sheath cells without marked changes in abundances of other photosynthetic complexes and Rubisco. Plants with higher Cytochrome bf abundance showed better light conversion efficiency in both Photosystems and could generate higher proton-motive force across the thylakoid membrane. Rieske FeS abundance correlated with CO assimilation rate and plants with a 10% increase in Rieske FeS content showed a 10% increase in CO assimilation rate at ambient and saturating CO and high light. Our results demonstrate that Cytochrome bf controls the rate of electron transport in C plants and that removing electron transport limitations can increase the rate of C photosynthesis.
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