Photosynthetic Processes and Mechanisms

RNA structure conservation in plastids across plant evolution

The paper identifies conserved RNA structures in plastid genomes across plants using a covariation-based pipeline, revealing known and novel regulatory elements.

Heme acts a chloroplast-to-nucleus retrograde signal to regulate intercellular trafficking via plasmodesmata

This study identifies heme as a chloroplast-to-nucleus retrograde signal that regulates plasmodesmata function to control intercellular trafficking in plants.

Exploring intra-specific variation in photosynthesis of maize and sorghum

This study examines photosynthetic variation in maize and sorghum cultivars across canopy strata, finding significant differences in CO2 assimilation and physiological traits.

A photosynthetic checkpoint halts Synechocystis sp. PCC 6803 response to nitrogen deprivation during glucose-mediated metabolic imbalance

This study shows glucose prevents chlorosis in Synechocystis sp. PCC 6803 by altering redox balance and photosynthetic electron flow, suggesting a redox-sensitive checkpoint links metabolic state to nitrogen deprivation response.

Engineering light robustness: Adaptive evolution uncovers new genetic determinants of HL tolerance in Synechocystis

This study evolves Synechocystis strains to tolerate high light, finds genetic mutations that improve photosynthesis and biomass, and identifies key genes involved in light tolerance.

Acclimation of photosynthesis began with a Cu-binding superoxide detoxifying enzyme

The paper identifies APE1 as a Cu-binding superoxide detoxifying enzyme essential for photosynthetic acclimation to oxygenic environments.

Positional 13C Enrichment Analysis of Aspartate by GC-MS to Determine PEPC Activity In Vivo

This paper develops a GC-MS-based method to measure PEPC activity in vivo by analyzing positional 13C enrichment in aspartate from Synechocystis cultures.

High-light adaptation in Synechocystis by accumulating NDH proteins and depleting specific phycobilisome linker proteins

This study identifies mutations that enhance high-light tolerance in Synechocystis by increasing NDH proteins and reducing specific phycobilisome linker proteins.

Acclimation of carbon metabolism to a changing environment across a leaf rosette of Arabidopsis thaliana

The paper analyzes carbon metabolism acclimation in Arabidopsis thaliana rosettes under different environmental conditions, finding tissue-specific differences in photosynthetic and metabolic responses.

Light-dark dependent rhythmic changes in chloroplast and mitochondrial activity in Chlamydomonas reinhardtii

This study shows light-dark cycle-dependent rhythmic coordination between mitochondrial and chloroplast activity in Chlamydomonas reinhardtii.

From Quantitative Trait Loci towards Mechanisms: Linkage Integration Hypothesis Testing (LIgHT) Sheds Light on the Mechanisms of Genetically Modulated Stress Tolerance

This paper introduces the LIgHT approach to test mechanistic hypotheses of genetic variations in plant stress tolerance, finding that chilling stress tolerance is linked to avoiding PSII photodamage.

A cyanobacterial screening platform for Rubisco mutant variants

The paper develops a cyanobacterial platform to screen Rubisco mutants, identifying a variant with improved thermostability and resilience to detrimental exchanges.

Structure of Photosystem I with SOD reveals coupling between energy conversion and oxidative stress protection

The paper reports the structure of the PSI-SOD supercomplex from Chromera velia, showing how energy conversion and oxidative stress protection are directly coupled.

Flavodiiron protein activity outcompetes cyclic electron transport when expressed in angiosperm Nicotiana tabacum

This study expresses flavodiiron proteins in Nicotiana tabacum, showing they enhance pseudo-cyclic electron transport and compete with cyclic electron transport under fluctuating light conditions.

Light-induced structural adaptation of the bundle-shaped phycobilisome from thylakoid-lacking cyanobacterium Gloeobacter violaceus

This study solves cryo-EM structures of phycobilisomes from Gloeobacter violaceus under different light conditions, revealing unique proteins and structural adaptations for light intensity changes.

The Xanthophyll Cycle balances Photoprotection and Efficiency in the seawater alga Nannochloropsis oceanica

This study investigates the role of the xanthophyll cycle in Nannochloropsis oceanica, showing it balances photoprotection and light-use efficiency by modulating enzyme levels and photoprotective mechanisms.

Constitutive and regulatory responses of Arabidopsis thaliana to harmonically oscillating light

This study examines how Arabidopsis thaliana responds to oscillating light by analyzing chlorophyll fluorescence and developing a model to explain the observed dynamics.

In vivo directed evolution of an ultra-fast RuBisCO from a semi-anaerobic environment imparts oxygen resistance

This paper uses in vivo directed evolution to improve the oxygen resistance of a fast Rubisco variant from Gallionellaceae, identifying mutations that enhance carboxylation efficiency under ambient oxygen.

Purification and pigment analysis of diadinoxanthin-binding PSI-LHCI supercomplexes from Euglena gracilis strain Z

This study purifies and analyzes PSI-LHCI supercomplexes from Euglena gracilis, revealing a unique pigment profile including diadinoxanthin and distinct from green-lineage organisms.

An ARF2-GRF5 module regulates chloroplast biogenesis through GLK1 and GLK independent mechanisms as part of a genetic network

The paper identifies an ARF2-GRF5 module that regulates chloroplast biogenesis through both GLK-dependent and independent mechanisms in Arabidopsis.

The RRM domain-containing protein Rbp3 interacts with ribosomes and the 3' ends of mRNAs encoding photosynthesis proteins

This paper identifies Rbp3 as an RRM domain protein in Synechocystis that binds mRNAs encoding photosynthesis proteins and localizes near ribosomes.

Rapid and Cost-Effective Digital Quantification of RNA Editing and Maturation in Organelle Transcripts

The paper introduces a cost-effective long-read sequencing method for quantifying RNA editing and intron retention in plant chloroplast transcripts, showing MORF2's role in RNA maturation.

Lipid Metabolism and Contact Site Homologs Are Enriched at the Chloroplast Envelope-Thylakoid Interface

The paper identifies lipid metabolism and contact site homologs enriched at the chloroplast envelope-thylakoid interface, revealing their role in maintaining membrane architecture.

Thriving Across Depths: How Blue Light Shapes a Large PSI Supercomplex and Specific Photosynthetic Traits in the seagrass Posidonia oceanica.

This study examines how blue light influences the photosynthetic apparatus of the seagrass Posidonia oceanica across different depths, identifying a novel PSI-LHCII supercomplex and depth-dependent structural adaptations.

The evolutionary history of plastid outer envelope proteins - a structure-sequence comparison

This study investigates the evolutionary origins of chloroplast outer envelope proteins using sequence and structure analyses, revealing dynamic evolutionary trajectories and structural adaptations.

Phylogenetic diversity of light dependent phosphorylation of Thr78 in Rca

The paper investigates the phylogenetic distribution and regulation of threonine 78 phosphorylation in Rubisco activase across plant species, finding light-dependent dephosphorylation only in Arabidopsis.

Joint operation of the CO2 concentrating mechanism and photorespiration in green algae during acclimation to limiting CO2

This study investigates the interaction between the CO2 concentrating mechanism and photorespiration in green algae under low CO2 conditions, finding that photorespiration remains active and glycolate excretion mitigates toxicity.

Advanced illumination-imaging reveals photosynthesis-triggered pH, ATP and NAD redox signatures across plant cell compartments

The paper uses advanced imaging to show photosynthesis affects pH, ATP, and NAD redox in plant cells beyond chloroplasts.

Fe starvation induces a second LHCI tetramer to photosystem I in green algae

The paper shows Fe starvation in green algae leads to a second LHCI tetramer associated with PSI, similar to cyanobacteria's isiA antenna ring.

CP12 controls ribulose 1,5 bisphosphate recycling and carbon acquisition in Chlamydomonas reinhardtii

This paper investigates the role of CP12 in regulating RuBP regeneration and CO2 acquisition in Chlamydomonas reinhardtii, showing that CP12 deletion affects RuBP levels and RuBisCO relocation.