Photosynthetic Processes and Mechanisms

Quantifying photosynthetic restrictions

This paper develops a consistent framework to quantify photosynthetic restrictions and provides examples to demonstrate its application.

Dynamic Disorder in Chlorophyll Aggregation and Light-Harvesting Complex II in the Plant Thylakoid Membrane using Coarse-Grained Simulations

This study uses coarse-grained simulations to investigate dynamic disorder in chlorophyll aggregation and LHCII conformations in plant thylakoid membranes, revealing non-exponential decay and multiple time scales in dimer formation and inter-CLA fluctuations.

Fructose-1,6-bisphosphatase (FBPase) fine-tunes heterotrophic growth in cyanobacteria

This study identifies FBPase in Synechocystis as a monofunctional enzyme that supports heterotrophic growth without redox regulation, distinct from the bifunctional F/SBPase.

A Mitochondrially Derived Plastidial Transporter Regulates Photosynthesis in the Diatom Phaeodactylum tricornutum

This study identifies a mitochondrial carrier transporter in diatoms that facilitates energy exchange between mitochondria and plastids, supporting photosynthesis.

The minor antennae of photosystem II contribute to qH-energy dissipation in Arabidopsis

This study shows that minor antennae in Arabidopsis can be quenched by qH, but are not strictly required for qH induction, suggesting they act as a secondary safety valve for photoprotective energy dissipation.

Adapting C4 photosynthesis to atmospheric change and increasing productivity by elevating Rubisco content in Sorghum and Sugarcane

This paper shows that increasing Rubisco content in sorghum and sugarcane through genetic modification improves photosynthetic efficiency and productivity, with field and greenhouse trials showing biomass increases of 15.5% and 37-81% respectively.

Ultrahigh Resolution Structure of the Heat-stable Form-IAq RuBisCO from the Thermophilic Purple Sulfur Bacterium Thermochromatium tepidum

This paper reports the ultrahigh-resolution structure of a form-IAq RuBisCO from Thermochromatium tepidum, revealing structural features contributing to its thermostability.

Natural Variation in Photoprotection: Rapid NPQ Kinetics in Ferns

The paper examines rapid NPQ kinetics in ferns, finding faster induction and relaxation compared to other species, with implications for adaptation to light fluctuations.

Bundle sheath cell-dependent chloroplast movement in mesophyll cells of C4 plants analyzed using live leaf-section imaging

The paper uses live leaf-section imaging to show that bundle sheath cells mediate mesophyll chloroplast aggregation in C4 plants.

Mobility of Four Structural Regions Drives Isoform-Specific Properties of Plant LPOR

The paper characterizes LPOR isoform properties across six plant species, revealing differences in Chlide affinity, oligomerization, and conformational flexibility, with four mobile regions identified via AlphaFold2.

The thylakoid lumen Deg1 protease affects non-photochemical quenching via the levels of violaxanthin de-epoxidase and PsbS

This study shows that the thylakoid lumen Deg1 protease regulates non-photochemical quenching by controlling the levels of violaxanthin de-epoxidase and PsbS proteins in Arabidopsis.

Proteomic analysis of unicellular cyanobacterium Crocosphaera subtropica ATCC 51142 under extended light or dark growth

This study uses proteomic analysis to examine how extended light or dark conditions affect protein expression in the cyanobacterium Crocosphaera subtropica, identifying key proteases involved in photosynthetic regulation.

Biochemical evidence for the diversity of LHCI proteins in PSI-LHCI from the red alga Galdieria sulphuraria NIES-3638

The paper identifies a novel chlorophyll a/b-binding protein, RedCAP, in the PSI-LHCI supercomplexes of Galdieria sulphuraria, highlighting its distinct binding properties and spectral characteristics compared to LHC proteins.

Spillover is the dominant non-photochemical quenching mechanism in angiosperms

The paper identifies spillover as the dominant NPQ mechanism in angiosperms using spectroscopic analysis and genetic mutants.

Plastoquinone redox status influences carboxysome integrity via a RpaA- and ROS-dependent regulatory network

The paper shows that plastoquinone redox status affects carboxysome integrity through a RpaA- and ROS-dependent network in cyanobacteria.

An Evolutionary Conserved Multi-Stress Sensory Histidine Kinase NblS Associates With Photosystem II Proteins And Responds To Its Redox Status In The Cyanobacterium Synechococcus elongatus PCC 7942

This study investigates how NblS, a histidine kinase in Synechococcus elongatus, senses stress by interacting with PSII proteins and responding to redox changes.

Dynamic photosynthetic labelling and carbon-positional mass spectrometry monitor in vivo carbon assimilation rates by ribulose-1,5-bisphosphate carboxylase.

This paper develops a method to distinguish RUBISCO activity from CBB cycle activities by analyzing carbon positional labeling in 3PGA using GC-MS after 13CO2 labeling.

In vivo two-photon FLIM resolves photosynthetic properties of maize bundle sheath cells

This study uses two-photon FLIM to analyze photosynthetic properties of maize bundle sheath cells in vivo, revealing reduced PSII activity and acetic acid-induced fluorescence quenching.

Guard cell photorespiration has a major impact on photosynthesis, growth and stomatal behavior in Arabidopsis

The paper manipulates photorespiration in Arabidopsis guard cells and finds it significantly affects stomatal behavior, growth, and photosynthesis.

Light quality affects chlorophyll biosynthesis and photosynthetic performance in Antarctic Chlamydomonas

This study examines how light quality affects chlorophyll biosynthesis and photosynthetic performance in two Antarctic Chlamydomonas species under extreme conditions.

Kinetics of reformation of an S0 state capable of progressing to an S1 state after the O2 release by Photosystem II.

The paper investigates the kinetics of S0 state reformation in PSII after O2 release, finding similar kinetics to the S3TyrZ* to S0TyrZ transition, suggesting no delay for substrate water insertion.

Modification of Non-photochemical Quenching Pathways in the C4 Model Plant Setaria viridis Revealed Shared and Unique Photoprotection Mechanisms as Compared to C3 Plants

This study overexpresses NPQ genes in C4 plant Setaria viridis to compare photoprotection mechanisms with C3 plants, finding shared and unique traits that could improve crop resilience.

The trimeric thylakoidal Tat receptor complex consists of a homo-oligomeric TatC core with associated TatB subunits

The paper identifies the trimeric TatC core as the stable component of the TatBC receptor complex, with TatB subunits bound independently.

Excitation Spillover from PSII to PSI Measured in Leaves at 77K

The paper measures excitation spillover from PSII to PSI in leaves at 77K and finds that spillover ratios are comparable across growth light conditions and higher in State 1.

From dimer to tetramer: the evolutionary trajectory of C4 photosynthetic-NADP-ME oligomeric state in Poaceae

This study investigates how amino acid changes in C4-NADP-ME and nonC4-NADP-ME enzymes affect their oligomeric states and function in Poaceae species.

Developing a model system to sustain ex vivo chloroplast function

The paper develops a chloroplast media to sustain ex vivo chloroplast function using metabolic modeling and isolated chloroplasts from Chlamydomonas reinhardtii.

Hornworts reveal a spatial model for pyrenoid-based CO2-concentrating mechanisms in land plants

This study investigates the pyrenoid-based CO2-concentrating mechanism in hornworts, revealing conserved components and a spatial model similar to Chlamydomonas.

Variation in relaxation of non-photochemical quenching between the founder genotypes of the soybean (Glycine max) nested association mapping population

The paper measures NPQ relaxation variation in soybean genotypes to assess its potential for improving photosynthesis and yield.

Modified Chlorophyll Pigment at ChlD1 Tunes Photosystem II Beyond the Red-Light Limit

The paper investigates how substituting chlorophyll d for chlorophyll a at the ChlD1 site in PSII shifts the spectral range beyond far-red light, using quantum mechanical calculations and simulations.

Evolutionary Dynamics of RuBisCO: Emergence of the Small Subunit and its Impact Through Time

The paper analyzes the evolutionary dynamics of RuBisCO, showing how the small subunit influenced the enzyme's conformational flexibility and response to atmospheric changes.