Photosynthesis Research最新文献

{"title":"On the Pelletier and Caventou (1817, 1818) papers on chlorophyll and beyond.","authors":"Govindjee Govindjee, Alexandrina Stirbet, Jonathan S Lindsey, Hugo Scheer","doi":"10.1007/s11120-024-01081-x","DOIUrl":"10.1007/s11120-024-01081-x","url":null,"abstract":"<p><p>The first use of the word 'chlorophyll' (chlorophile or chlorophyle in the French original) appeared in two papers by Pierre-Joseph Pelletier and Joseph Bienaimé Caventou, pharmacists in Paris who isolated and studied the green pigment from plants. Here, we provide English translations of their 1818 note and the slightly longer 1817 paper. Historical context is provided including a timeline of key discoveries in chlorophyll chemistry pertaining to photosynthesis.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":" ","pages":"55-60"},"PeriodicalIF":3.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140137115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulating spectral response of raw photosynthetic pigments via ternary cadmium chalcogenide quantum dots: simultaneous enhancement at green spectrum and inhibition at UV region.","authors":"Sümeyye Aykut, Nida Ük, İbrahim Yağız Coşkun, Sultan Şahin Keskin, Ilgın Nar, Levent Trabzon, Caner Ünlü","doi":"10.1007/s11120-024-01085-7","DOIUrl":"10.1007/s11120-024-01085-7","url":null,"abstract":"<p><p>Photosynthesis relies on the absorption of sunlight by photosynthetic pigments (PPs) such as chlorophylls and carotenoids. While these pigments are outstanding at harvesting light, their natural structure restricts their ability to harvest light at specific wavelengths. In this study, Oleic acid-capped CdSeS and CdTeS ternary quantum dots (QDs) were synthesized using a novel two-phase synthesis method. Then, these QDs were used to interact with raw PPs, a mixture of chlorophylls and carotenoids isolated from spinach. Our findings revealed the following: (1) Interacting QDs with raw PPs effectively inhibited the chlorophyll fluorescence of the pigments upon excitation in UV light region (250-400 nm) without causing any damage to their structure. (2) By forming an interaction with QDs, the chlorophyll fluorescence of raw PPs could be induced through excitation with green-light spectrum. (3) The composition of the QDs played a fundamental role in their interaction with PPs. Our study demonstrated that the photophysical properties of isolated PPs could be modified by using cadmium-based QDs by preserving the structure of the pigments themselves.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":" ","pages":"1-16"},"PeriodicalIF":3.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11006769/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139973060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vitro demetalation of central magnesium in various chlorophyll derivatives using Mg-dechelatase homolog from the chloroflexi Anaerolineae.","authors":"Soma Sato, Mitsuaki Hirose, Ryouichi Tanaka, Hisashi Ito, Hitoshi Tamiaki","doi":"10.1007/s11120-024-01088-4","DOIUrl":"10.1007/s11120-024-01088-4","url":null,"abstract":"<p><p>In the metabolic pathway of chlorophylls (Chls), an enzyme called STAY-GREEN or SGR catalyzes the removal of the central magnesium ion of Chls and their derivatives to their corresponding free bases, including pheophytins. The substrate specificity of SGR has been investigated through in vitro reactions using Chl-related molecules. However, information about the biochemical properties and reaction mechanisms of SGR and its substrate specificity remains elusive. In this study, we synthesized various Chl derivatives and investigated their in vitro dechelations using an SGR enzyme. Chl-a derivatives with the C3-vinyl group on the A-ring, which is commonly found as a substituent in natural substrates, and their analogs with ethyl, hydroxymethyl, formyl, and styryl groups at the C3-position were prepared as substrates. In vitro dechelatase reactions of these substrates were performed using an SGR enzyme derived from an Anaerolineae bacterium, allowing us to investigate their specificity. Reactivity was reduced for substrates with an electron-withdrawing formyl or sterically demanding styryl group at the C3-position. Furthermore, the Chl derivative with the C8-styryl group on the B-ring was less reactive for SGR dechelation than the C3-styryl substrate. These results indicate that the SGR enzyme recognizes substituents on the B-ring of substrates more than those on the A-ring.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":" ","pages":"45-53"},"PeriodicalIF":3.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11006732/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excitation transfer and quenching in photosystem II, enlightened by carotenoid triplet state in leaves","authors":"Agu Laisk, Richard B. Peterson, Vello Oja","doi":"10.1007/s11120-024-01086-6","DOIUrl":"https://doi.org/10.1007/s11120-024-01086-6","url":null,"abstract":"<p>Accumulation of carotenoid (Car) triplet states was investigated by singlet–triplet annihilation, measured as chlorophyll (Chl) fluorescence quenching in sunflower and lettuce leaves. The leaves were illuminated by Xe flashes of 4 μs length at half-height and 525–565 or 410–490 nm spectral band, maximum intensity 2 mol quanta m⁻² s⁻¹, flash photon dose up to 10 μmol m⁻² or 4–10 PSII excitations. Superimposed upon the non-photochemically unquenched <i>F</i>_md state, fluorescence was strongly quenched near the flash maximum (minimum yield <i>F</i>_e), but returned to the <i>F</i>_md level after 30–50 μs. The fraction of PSII containing a ³Car in equilibrium with singlet excitation was calculated as <i>T</i>_e = (<i>F</i>_md—<i>F</i>_e)/<i>F</i>_md. Light dependence of <i>T</i>_e was a rectangular hyperbola, whose initial slope and plateau were determined by the quantum yields of triplet formation and annihilation and by the triplet lifetime. The intrinsic lifetime was 9 μs, but it was strongly shortened by the presence of O₂. The triplet yield was 0.66 without nonphotochemical quenching (NPQ) but approached zero when NP-Quenched fluorescence approached 0.2 <i>F</i>_md. The results show that in the <i>F</i>_md state a light-adapted charge-separated PSII_L state is formed (Sipka et al., The Plant Cell 33:1286–1302, 2021) in which Pheo⁻P680⁺ radical pair formation is hindered, and excitation is terminated in the antenna by ³Car formation. The results confirm that there is no excitonic connectivity between PSII units. In the PSII_L state each PSII is individually turned into the NPQ state, where excess excitation is quenched in the antenna without ³Car formation.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":"25 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140166394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"International conference on “Photosynthesis and Hydrogen Energy Research for Sustainability-2023”: in honor of Robert Blankenship, Győző Garab, Michael Grätzel, Norman Hüner and Gunnar Öquist","authors":"","doi":"10.1007/s11120-024-01087-5","DOIUrl":"https://doi.org/10.1007/s11120-024-01087-5","url":null,"abstract":"<h3>Abstract</h3> <p>The 11th International Photosynthesis Conference on Hydrogen Energy Research and Sustainability 2023 was organized in honor of Robert Blankenship, Győző Garab, Michael Grätzel, Norman Hüner, and Gunnar Öquist, in Istanbul, Türkiye at Bahçeşehir University Future Campus from 03 to 09 July 2023. It was jointly supported by the International Society of Photosynthesis Research (ISPR) and the International Association for Hydrogen Energy (IAHE). In this article we provide brief details of the conference, its events, keynote speakers, and the scientific contribution of scientists honored at this conference. Further, we also describe the participation of young researchers, their talks, and their awards.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":"29 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140166680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of cationic antiseptics on the processes of light energy conversion in various photosynthetic pigment-protein complexes","authors":"","doi":"10.1007/s11120-024-01082-w","DOIUrl":"https://doi.org/10.1007/s11120-024-01082-w","url":null,"abstract":"<h3>Abstract</h3> <p>The widespread use of disinfectants and antiseptics, and consequently their release into the environment, determines the relevance of studying their potential impact on the main producers of organic matter on the planet—photosynthetic organisms. The review examines the effects of some biguanides and quaternary ammonium compounds, octenidine, miramistin, chlorhexidine, and picloxidine, on the functioning of the photosynthetic apparatus of various organisms (Strakhovskaya et al. in Photosynth Res 147:197–209, 2021; Knox et al. in Photosynth Res 153:103, 2022; Paschenko et al. in Photosynth Res 155:93–105, 2023a, Photosynth Res 2023b). A common feature of these antiseptics is the combination of hydrophobic and hydrophilic regions in the molecules, the latter carrying a positive charge(s). The comparison of the results obtained with intact bacterial membrane vesicles (chromatophores) and purified pigment-protein complexes (photosystem II and I) of oxygenic organisms allows us to draw conclusions about the mechanisms of the cationic antiseptic action on the functional properties of the components of the photosynthetic apparatus.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":"87 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140098195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-state mathematical model for the assessment of DCMU-treated photosystem II heterogeneity","authors":"Tatiana Yu. Plyusnina, Sergei S. Khruschev, Natalia S. Degtereva, Elena N. Voronova, Alena A. Volgusheva, Galina Yu. Riznichenko, Andrew B. Rubin","doi":"10.1007/s11120-024-01077-7","DOIUrl":"https://doi.org/10.1007/s11120-024-01077-7","url":null,"abstract":"<p>Photosystem II (PSII) is one of the main pigment-protein complexes of photosynthesis which is highly sensitive to unfavorable environmental factors. The heterogeneity of PSII properties is essential for the resistance of autotrophic organisms to stress factors. Assessment of the PSII heterogeneity may be used in environmental monitoring for on-line detection of contamination of the environment. We propose an approach to assess PSII oxygen-evolving complex and light-harvesting antenna heterogeneity that is based on mathematical modeling of the shape of chlorophyll <i>a</i> fluorescence rise of 3-(3,4-dichlorophenyl)-1,1-dimethylurea-treated samples. The hierarchy of characteristic times of the processes considered in the model makes it possible to reduce the model to a system of three ordinary differential equations. The analytic solution of the reduced three-state model is expressed as a sum of two exponential functions, and it exactly reproduces the solution of the complete system within the time range from microseconds to hundreds of milliseconds. The combination of several such models for reaction centers with different properties made it possible to use it as an instrument to study PSII heterogeneity. PSII heterogeneity was studied for <i>Chlamydomonas</i> at different intensities of actinic light, for <i>Scenedesmus</i> under short-term heating, and for <i>Chlorella</i> grown in nitrate-enriched and nitrate-depleted media.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":"48 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140098207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inverted region in the reaction of the quinone reduction in the A₁-site of photosystem I from cyanobacteria.","authors":"Dmitry Cherepanov, Arseny Aybush, T Wade Johnson, Ivan Shelaev, Fedor Gostev, Mahir Mamedov, Victor Nadtochenko, Alexey Semenov","doi":"10.1007/s11120-023-01020-2","DOIUrl":"10.1007/s11120-023-01020-2","url":null,"abstract":"<p><p>Photosystem I from the menB strain of Synechocystis sp. PCC 6803 containing foreign quinones in the A₁ sites was used for studying the primary steps of electron transfer by pump-probe femtosecond laser spectroscopy. The free energy gap (- ΔG) of electron transfer between the reduced primary acceptor A₀ and the quinones bound in the A₁ site varied from 0.12 eV for the low-potential 1,2-diamino-anthraquinone to 0.88 eV for the high-potential 2,3-dichloro-1,4-naphthoquinone, compared to 0.5 eV for the native phylloquinone. It was shown that the kinetics of charge separation between the special pair chlorophyll P₇₀₀ and the primary acceptor A₀ was not affected by quinone substitutions, whereas the rate of A₀ → A₁ electron transfer was sensitive to the redox-potential of quinones: the decrease of - ΔG by 400 meV compared to the native phylloquinone resulted in a ~ fivefold slowing of the reaction The presence of the asymmetric inverted region in the ΔG dependence of the reaction rate indicates that the electron transfer in photosystem I is controlled by nuclear tunneling and should be treated in terms of quantum electron-phonon interactions. A three-mode implementation of the multiphonon model, which includes modes around 240 cm^-1 (large-scale protein vibrations), 930 cm^-1 (out-of-plane bending of macrocycles and protein backbone vibrations), and 1600 cm^-1 (double bonds vibrations) was applied to rationalize the observed dependence. The modes with a frequency of at least 1600 cm^-1 make the predominant contribution to the reorganization energy, while the contribution of the \"classical\" low-frequency modes is only 4%.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":" ","pages":"115-131"},"PeriodicalIF":3.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9394689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chlorophyll triplet states in thylakoid membranes of Acaryochloris marina. Evidence for a triplet state sitting on the photosystem I primary donor populated by intersystem crossing.","authors":"Stefano Santabarbara, Alessandro Agostini, Anastasia A Petrova, Marco Bortolus, Anna Paola Casazza, Donatella Carbonera","doi":"10.1007/s11120-023-01023-z","DOIUrl":"10.1007/s11120-023-01023-z","url":null,"abstract":"<p><p>Photo-induced triplet states in the thylakoid membranes isolated from the cyanobacterium Acaryocholoris marina, that harbours Chlorophyll (Chl) d as its main chromophore, have been investigated by Optically Detected Magnetic Resonance (ODMR) and time-resolved Electron Paramagnetic Resonance (TR-EPR). Thylakoids were subjected to treatments aimed at poising the redox state of the terminal electron transfer acceptors and donors of Photosystem II (PSII) and Photosystem I (PSI), respectively. Under ambient redox conditions, four Chl d triplet populations were detectable, identifiable by their characteristic zero field splitting parameters, after deconvolution of the Fluorescence Detected Magnetic Resonance (FDMR) spectra. Illumination in the presence of the redox mediator N,N,N',N'-Tetramethyl-p-phenylenediamine (TMPD) and sodium ascorbate at room temperature led to a redistribution of the triplet populations, with T₃ (|D|= 0.0245 cm^-1, |E|= 0.0042 cm^-1) becoming dominant and increasing in intensity with respect to untreated samples. A second triplet population (T₄, |D|= 0.0248 cm^-1, |E|= 0.0040 cm^-1) having an intensity ratio of about 1:4 with respect to T₃ was also detectable after illumination in the presence of TMPD and ascorbate. The microwave-induced Triplet-minus-Singlet spectrum acquired at the maximum of the |D|-|E| transition (610 MHz) displays a broad minimum at 740 nm, accompanied by a set of complex spectral features that overall resemble, despite showing further fine spectral structure, the previously reported Triplet-minus-Singlet spectrum attributed to the recombination triplet of PSI reaction centre, <math> <mrow><msup><mrow></mrow> <mn>3</mn></msup> <msubsup><mi>P</mi> <mrow><mn>740</mn></mrow> <mrow></mrow></msubsup> </mrow> </math> [Schenderlein M, Çetin M, Barber J, et al. Spectroscopic studies of the chlorophyll d containing photosystem I from the cyanobacterium Acaryochloris marina. Biochim Biophys Acta 1777:1400-1408]. However, TR-EPR experiments indicate that this triplet displays an eaeaea electron spin polarisation pattern which is characteristic of triplet sublevels populated by intersystem crossing rather than recombination, for which an aeeaae polarisation pattern is expected instead. It is proposed that the observed triplet, which leads to the bleaching of the P₇₄₀ singlet state, sits on the PSI reaction centre.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":" ","pages":"133-152"},"PeriodicalIF":3.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9471964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term light adaptation of light-harvesting and energy-transfer processes in the glaucophyte Cyanophora paradoxa under different light conditions.","authors":"Yoshifumi Ueno, Seiji Akimoto","doi":"10.1007/s11120-023-01029-7","DOIUrl":"10.1007/s11120-023-01029-7","url":null,"abstract":"<p><p>In response to fluctuation in light intensity and quality, oxygenic photosynthetic organisms modify their light-harvesting and excitation energy-transfer processes to maintain optimal photosynthetic activity. Glaucophytes, which are a group of primary symbiotic algae, possess light-harvesting antennas called phycobilisomes (PBSs) consistent with cyanobacteria and red algae. However, compared with cyanobacteria and red algae, glaucophytes are poorly studied and there are few reports on the regulation of photosynthesis in the group. In this study, we examined the long-term light adaptation of light-harvesting functions in a glaucophyte, Cyanophora paradoxa, grown under different light conditions. Compared with cells grown under white light, the relative number of PBSs to photosystems (PSs) increased in blue-light-grown cells and decreased in green-, yellow-, and red-light-grown cells. Moreover, the PBS number increased with increment in the monochromatic light intensity. More energy was transferred from PBSs to PSII than to PSI under blue light, whereas energy transfer from PBSs to PSII was reduced under green and yellow lights, and energy transfer from the PBSs to both PSs decreased under red light. Decoupling of PBSs was induced by intense green, yellow, and red lights. Energy transfer from PSII to PSI (spillover) was observed, but the contribution of the spillover did not distinctly change depending on the culture light intensity and quality. These results suggest that the glaucophyte C. paradoxa modifies the light-harvesting abilities of both PSs and excitation energy-transfer processes between the light-harvesting antennas and both PSs during long-term light adaption.</p>","PeriodicalId":20130,"journal":{"name":"Photosynthesis Research","volume":" ","pages":"165-175"},"PeriodicalIF":3.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9515146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}