scholarly journals Overexpression of the RieskeFeS Protein Increases Electron Transport Rates and Biomass Yield

2017 ◽  
Vol 175 (1) ◽  
pp. 134-145 ◽  
Author(s):  
Andrew J. Simkin ◽  
Lorna McAusland ◽  
Tracy Lawson ◽  
Christine A. Raines
Keyword(s):  
Electron Transport ◽  
Biomass Yield ◽  
Electron Transport Rates

Kinase-induced changes in electron transport rates of spinach chloroplasts

1982 ◽  
Vol 217 (1) ◽  
pp. 362-367 ◽  
Author(s):  
J.W. Farchaus ◽  
W.R. Widger ◽  
W.A. Cramer ◽  
R.A. Dilley
Keyword(s):  
Electron Transport ◽  
Spinach Chloroplasts ◽  
Electron Transport Rates ◽  
Induced Changes

scholarly journals Irradiance and nutrient-dependent effects on photosynthetic electron transport in Arctic phytoplankton: A comparison of two chlorophyll fluorescence-based approaches to derive primary photochemistry

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0256410
Author(s):  
Yayla Sezginer ◽  
David J. Suggett ◽  
Robert W. Izett ◽  
Philippe D. Tortell
Keyword(s):  
Chlorophyll Fluorescence ◽  
Electron Transport ◽  
Electron Transport Rate ◽  
Photochemical Efficiency ◽  
Photosynthetic Electron Transport ◽  
Marine Phytoplankton ◽  
Transport Rate ◽  
Variable Fluorescence ◽  
Primary Photochemistry ◽  
Electron Transport Rates

We employed Fast Repetition Rate fluorometry for high-resolution mapping of marine phytoplankton photophysiology and primary photochemistry in the Lancaster Sound and Barrow Strait regions of the Canadian Arctic Archipelago in the summer of 2019. Continuous ship-board analysis of chlorophyll a variable fluorescence demonstrated relatively low photochemical efficiency over most of the cruise-track, with the exception of localized regions within Barrow Strait, where there was increased vertical mixing and proximity to land-based nutrient sources. Along the full transect, we observed strong non-photochemical quenching of chlorophyll fluorescence, with relaxation times longer than the 5-minute period used for dark acclimation. Such long-term quenching effects complicate continuous underway acquisition of fluorescence amplitude-based estimates of photosynthetic electron transport rates, which rely on dark acclimation of samples. As an alternative, we employed a new algorithm to derive electron transport rates based on analysis of fluorescence relaxation kinetics, which does not require dark acclimation. Direct comparison of kinetics- and amplitude-based electron transport rate measurements demonstrated that kinetic-based estimates were, on average, 2-fold higher than amplitude-based values. The magnitude of decoupling between the two electron transport rate estimates increased in association with photophysiological diagnostics of nutrient stress. Discrepancies between electron transport rate estimates likely resulted from the use of different photophysiological parameters to derive the kinetics- and amplitude-based algorithms, and choice of numerical model used to fit variable fluorescence curves and analyze fluorescence kinetics under actinic light. Our results highlight environmental and methodological influences on fluorescence-based photochemistry estimates, and prompt discussion of best-practices for future underway fluorescence-based efforts to monitor phytoplankton photosynthesis.

Theory of Redox Conduction and the Measurement of Electron Transport Rates Through Electrochemically Active Biofilms

2015 ◽  
pp. 177-210 ◽  
Author(s):  
Darryl A. Boyd ◽  
Rachel M. Snider ◽  
Jeffrey S. Erickson ◽  
Jared N. Roy ◽  
Sarah M. Strycharz-Glaven ◽  
...  
Keyword(s):  
Electron Transport ◽  
Electrochemically Active ◽  
Electron Transport Rates

Modulation of the Cytochrome b6/f Complex and Photosystem I Under Growth-Limiting Light in Amaranthus hypochondriacus, an NAD-ME C4 Plant

1996 ◽  
Vol 23 (3) ◽  
pp. 305 ◽  
Author(s):  
MV Sailaja ◽  
VSR Das
Keyword(s):  
Electron Transport ◽  
Photosystem Ii ◽  
Photosystem I ◽  
Thylakoid Membranes ◽  
Bundle Sheath ◽  
C4 Plant ◽  
Cytochrome B6 ◽  
Amaranthus Hypochondriacus ◽  
Energy Consuming ◽  
Electron Transport Rates

Highly characteristic responses of thylakoid membranes were observed in function and composition when fully developed plants of Amaranthus hypochondriacus L. grown under light sufficient (2000 μmol m-2 s-1) conditions were transferred to light limited conditions (650 μmol m-2 s-1 and 200 μmol m-2 s-1). The whole-chain, photosystem I and photosystem II electron transport rates were depressed in both bundle sheath and mesophyll thylakoids with remarkable differences between them in variation of rates under limiting light. The reduction in PSI electron transport in the mesophyll could be attributed to reduced PSI centres, while in the bundle sheath, a modulation of cytochrome b6/f complex regulated the rates of PSI electron transport. The requirement for an unaltered number of PSI centres under limiting light in the bundle sheath is ascribed to operation of an energy-consuming C4 pump.

scholarly journals Toward autonomous measurements of photosynthetic electron transport rates: An evaluation of active fluorescence-based measurements of photochemistry

2015 ◽  
Vol 13 (3) ◽  
pp. e10014 ◽  
Author(s):  
Greg M. Silsbe ◽  
Kevin Oxborough ◽  
David J. Suggett ◽  
Rodney M. Forster ◽  
Sven Ihnken ◽  
...  
Keyword(s):  
Electron Transport ◽  
Photosynthetic Electron Transport ◽  
Electron Transport Rates

scholarly journals Stimulation of isoprene emissions and electron transport rates as key mechanisms of thermal tolerance in the tropical species Vismia guianensis

2020 ◽  
Vol 26 (10) ◽  
pp. 5928-5941
Author(s):  
Tayana B. Rodrigues ◽  
Christopher R. Baker ◽  
Anthony P. Walker ◽  
Nate McDowell ◽  
Alistair Rogers ◽  
...  
Keyword(s):  
Electron Transport ◽  
Thermal Tolerance ◽  
Tropical Species ◽  
Vismia Guianensis ◽  
Electron Transport Rates ◽  
Stimulation Of
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