Response of the thylakoid proteome of Synechocystis sp. PCC 6803 to photohinibitory intensities of orange-red light -5thOctober 2018, Elsevier

Photoautotrophic growth of Synechocystis sp. PCC 6803 in a flat-panel photobioreactor, run in turbidostat mode under increasing intensities of orange-red light (636 nm), showed a maximal growth rate (0.12 h−1) at 300 μmolphotons m−2 s−1, whereas first signs of photoinhibition were detected above 800 μmolphotons m−2 s−1. To investigate the dynamic modulation of the thylakoid proteome in response to photoinhibitory light intensities, quantitative proteomics analyses by SWATH mass spectrometry were performed by comparing thylakoid membranes extracted from Synechocystis grown under low-intensity illumination (i.e. 50 μmolphotons m−2 s−1) with samples isolated from cells subjected to photoinhibitory light regimes (800, 950 and 1460 μmolphotons m−2 s−1). We identified and quantified 126 proteins with altered abundance in all three photoinhibitory illumination regimes.

These data reveal ...

A.CordaraM.Manfredi,  P. Alphen,  E. Marengo,  R.PironeG.SaraccoF.Branco dos Santos,  K .J. Hellingwerf,  C.Pagliano

Analysis of the light intensity dependence of the growth of Synechocystis and of the light distribution in a photobioreactor energized by 635 nm light - 27th July 2018, PeerJ

Synechocystis gathered momentum in modelling studies and biotechnological applications owing to multiple factors like fast growth, ability to fix carbon dioxide into valuable products, and the relative ease of genetic manipulation. Synechocystis physiology and metabolism, and consequently, the productivity of Synechocystis-based photobioreactors (PBRs), are heavily light modulated. Here, we set up a turbidostat-controlled lab-scale cultivation system in order to study the influence of varying orange–red light intensities on Synechocystis growth characteristics and photosynthetic activity. Synechocystis growth and photosynthetic activity were found to raise as supplied light intensity increased up to 500 μmol photons m−2 s−1 and to enter the photoinhibition state only at 800 μmol photons m−2 s−1. Interestingly, reverting the light to a non-photo-inhibiting intensity unveiled Synechocystis to be able to promptly recover. Furthermore...



This project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No. 760994. 

The content of this publication is the sole responsibility of the authors. The European Commission or its services cannot be held responsible for any use that may be made of the information it contains.

© 2018 Engicoin

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