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Open research questions in Photosynthetic Processes and Mechanisms

484 gap statements mined from Photosynthetic Processes and Mechanisms papers in our 7.9M-paper local library, which holds 2,351 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • There is a lack of understanding of how desiccation-tolerant green algae regulate photosynthetic electron transport during dehydration and rehydration. Prior studies have not fully elucidated the role of PTOX and FLV in regulating photosynthetic electron transport in desiccation-tolerant organisms.

    Photoprotective strategies of Haematococcus lacustris in response to desiccation stress · 2026 · DOI

  • Cyto-nuclear discordance has emerged in some orders, such as Liliales and Asparagales. The uncertainty in the relationships among some families, such as Tofieldiaceae and Araceae, remains an area of ongoing research. The analysis of large datasets of gene sequences poses technical challenges.

    Nuclear Phylogenomics of Angiosperms and Evolutionary Implications · 2025 · DOI

  • The abrupt and expansive diversification of angiosperms remains an area of ongoing research. There is a need to better understand the phylogenetic relationships among angiosperm families and orders.

    Nuclear Phylogenomics of Angiosperms and Evolutionary Implications · 2025 · DOI

  • The paper identifies the need for innovative strategies to secure food supplies sustainably.

    Photosynthesis: Genetic Strategies Adopted to Gain Higher Efficiency · 2024 · DOI

  • The impact of the circadian clock on secondary metabolites remains less explored. There is a gap of knowledge for volatile terpenes. The direct regulation of sterols by canonical clock components still remains elusive.

    Unlocking Nature’s Rhythms: Insights into Secondary Metabolite Modulation by the Circadian Clock · 2024 · DOI

  • The lack of sufficient or specific sensitivity in plants to form an adequate effective response to abiotic stresses. The need for a genetic engineering approach to regulate oxidative metabolism and enhance plant resistance to cold stress.

    Superoxide Dismutase Premodulates Oxidative Stress in Plastids for Protection of Tobacco Plants from Cold Damage Ultrastructure Damage · 2024 · DOI

  • However, it remains unclear how the intrinsic charge of this region, independent of its phosphorylation status, influences state transitions and thylakoid membrane organization.

    Charge reversal at the Lhcb2 N-terminus impairs phosphorylation and PSI–LHCII complex formation · 2026 · DOI

  • This study provides insight into the functional mechanism of PsbS and establishes a framework for further investigation of PsbS-mediated regulation of NPQ and its role in optimizing photosynthetic performance under fluctuating light.

    Probing the influence of PsbS on thylakoid lipid fluidity · 2026 · DOI

  • These findings indicate that direct interactions between PsbS and thylakoid lipids are insufficient to account for NPQ regulation and suggest that interactions with other components in the thylakoid membranes are likely essential.

    Probing the influence of PsbS on thylakoid lipid fluidity · 2026 · DOI

  • It is suggested that the “terminal rise” in PSII CC and the “thermal” I 1 -I 2 phase in vivo may involve the same pathways of DQ suppression, the molecular steps of which remain to be clarified by further research.

    Unique properties of light-induced changes of variable chlorophyll fluorescence in purified PSII core complexes of Thermosynechococcus vestitus · 2026 · DOI

  • While extensively characterized in model cyanobacteria, the regulation of state transitions in diazotrophic species remains poorly understood.

    Diazotrophy affects the state transitions in unicellular nitrogen fixing cyanobacteria · 2026 · DOI

  • Although the role of FtsH in D1 turnover is well established, the regulatory mechanisms that ensure precise and controlled degradation remain unclear.

    The GreenCut protein TEF6 maintains photosystem II homeostasis under high light by stabilizing FtsH accumulation in Chlamydomonas reinhardtii · 2026 · DOI

  • These results demonstrate that WH8109 does not undergo detectable CA4 under the conditions tested, despite possessing an intact CA4-B genomic island, highlighting a genotype-phenotype discrepancy that warrants further investigation.

    Comparative study on chromatic acclimation in the two Synechococcus species WH8109 and RS9916 · 2026 · DOI

  • Despite the central role of photosynthesis in plant growth, the effects of prolonged heat stress on the primary reactions of photosynthesis remain poorly understood.

    Daily Heat Stress Induces Donor‐Side Limitation of PSI Via Downregulation of the Cyt b 6 f Complex · 2026 · DOI

  • Tropospheric ozone (O 3) reduces crop productivity, but the sites at which ozone alters photosynthetic electron transport remain unclear.

    Chlorophyll a Fluorescence Kinetics Reveal That Ozone Stress Redistributes Electron Transport Limitations Between PSII and PSI in Wheat · 2026 · DOI

  • However, the potential of FLV in crop improvement and chilling tolerance remains poorly understood.

    Flavodiiron Proteins Increase Plant Biomass Under Fluctuating Light and Enhance Chilling Tolerance in Tobacco · 2026 · DOI

  • Temperature responses of g m are commonly treated as intrinsic properties of the leaf, yet it remains unclear whether they acclimate to growth conditions.

    Growth Temperature Alters the Thermal Sensitivity of Mesophyll Conductance in Wild and Cultivated Tomato · 2026 · DOI

  • Among proposed strategies, enhancing photorespiratory efficiency via upregulation of core enzymes has highlighted glycine decarboxylase (GDC) as a promising target, however, it remains unclear whether simultaneous upregulation of multiple GDC components would yield additive or synergistic improvements in plant environmental acclimation.

    Multi‐Subunit Engineering of Photorespiratory Glycine Decarboxylase Refines Photosynthesis, Growth and Metabolic Robustness of Arabidopsis · 2026 · DOI

  • While the photosynthetic activity of drought-stressed and rewatered Jatropha curcas has been investigated, little is known about the effects of drought and rewatering on chloroplast integrity and thylakoid architecture, critical determinants of photosynthetic performance under stress.

    Fast structural remodeling of Jatropha curcas thylakoids upon recovery underpins chloroplast resilience to drought · 2026 · DOI

  • We discuss approaches that have improved yield, those that have produced detrimental effects, and those that remain controversial or in the development stage.

    Advances in biotechnological strategies for improving photosynthetic productivity in C3 and C4 plants: falls and rises · 2026 · DOI

  • The literature showed contradictory results regarding the acclimation of C3 and C4 photosynthesis to low light intensities.

    Diurnal light fitness of the C3 and C4 species from the genus Atriplex under control and drought conditions · 2025 · DOI

  • In the case of cyanobacteria, however, the induction of the thermal dissipation in the antennae is insufficient to dissipate all excess energy, which is manifested as the increase in the steady-state level of chlorophyll fluorescence (Fs) under high light.

    Light-induced increase in the steady-state chlorophyll fluorescence in cyanobacteria reflects induction of energy dissipation complementary to orange carotenoid protein-dependent thermal dissipation · 2025 · DOI

  • The mechanism of primary charge separation in photosynthetic reaction centers is still not fully understood.

    Photophysical model of primary charge separation in green algal photosystem I based on combined analysis of time-resolved absorption and fluorescence spectra · 2025 · DOI

  • Regardless of a biotechnological application, several aspects of CAM biology are still poorly understood.

    Together we “CAM”: 12 open questions in Crassulacean acid metabolism biology · 2026 · DOI

  • Further research on the effects of superoxide dismutase on plant growth and productivity, - Investigation of the molecular mechanisms underlying the increased tolerance to cold stress, - Analysis of the potential applications of superoxide dismutase in crop…

    Superoxide Dismutase Premodulates Oxidative Stress in Plastids for Protection of Tobacco Plants from Cold Damage Ultrastructure Damage · 2024 · DOI

Most-cited papers in Photosynthetic Processes and Mechanisms

Most recent work

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Open questions raised by papers listed on this page include: (1) There is a lack of understanding of how desiccation-tolerant green algae regulate photosynthetic electron transport during dehydration and rehydration (“Photoprotective strategies of Haematococcus lacustris in response to…”, 2026); (2) It remains unclear how the intrinsic charge of this region, independent of its phosphorylation status, influences state transitions and thylakoid membrane organization (“Charge reversal at the Lhcb2 N-terminus impairs phosphorylation and PSI–LHCII…”, 2026); (3) It is suggested that the “terminal rise” in PSII CC and the “thermal” I 1 -I 2 phase in vivo may involve the same pathways of DQ suppression, the molecular steps of which remain to be clarified by further research (“Unique properties of light-induced changes of variable chlorophyll fluorescence…”, 2026); (4) While extensively characterized in model cyanobacteria, the regulation of state transitions in diazotrophic species remains poorly understood (“Diazotrophy affects the state transitions in unicellular nitrogen fixing…”, 2026); (5) Although the role of FtsH in D1 turnover is well established, the regulatory mechanisms that ensure precise and controlled degradation remain unclear (“The GreenCut protein TEF6 maintains photosystem II homeostasis under high light…”, 2026). 484 gap statements have been mined from Photosynthetic Processes and Mechanisms papers in our 7.9M-paper local library, which holds 2,351 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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