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Quantity of supplementary LED lightings regulates photosynthetic apparatus, improves photosynthetic capacity and enhances productivity of Cos lettuce grown in a tropical greenhouse Photosynth. Res. (IF 3.216) Pub Date : 2021-01-21 Jie He, Nur Khairunnisa Bte Jawahir, Lin Qin
Although cooling their rootzone allows year-round (temperate) vegetable production in Singapore's warm climate, these crops have frequently experienced increasingly unpredictable cloudy and hazy weather. Supplementary lighting with light-emitting diodes (LEDs) could be used to reduce the impacts of low light intensity. This study investigated the responses of temperate Cos lettuce (Lactuca sativa L
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Evidence for variable chlorophyll fluorescence of photosystem I in vivo Photosynth. Res. (IF 3.216) Pub Date : 2021-01-19 Ulrich Schreiber, Christof Klughammer
Room temperature fluorescence in vivo and its light-induced changes are dominated by chlorophyll a fluorescence excited in photosystem II, F(II), peaking around 685 nm. Photosystem I fluorescence, F(I), peaking around 730 nm, so far has been assumed to be constant in vivo. Here, we present evidence for significant contributions of F(I) to variable fluorescence in the green unicellular alga Chlorella
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Tuning the redox potential of tyrosine-histidine bioinspired assemblies Photosynth. Res. (IF 3.216) Pub Date : 2021-01-11 Emmanuel Odella, Thomas A. Moore, Ana L. Moore
Photosynthesis powers our planet and is a source of inspiration for developing artificial constructs mimicking many aspects of the natural energy transducing process. In the complex machinery of photosystem II (PSII), the redox activity of the tyrosine Z (Tyrz) hydrogen-bonded to histidine 190 (His190) is essential for its functions. For example, the Tyrz–His190 pair provides a proton-coupled electron
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The effect of different spectral light quality on the photoinhibition of Photosystem I in intact leaves Photosynth. Res. (IF 3.216) Pub Date : 2021-01-06 Riichi Oguchi, Ichiro Terashima, Wah Soon Chow
Light energy causes damage to Photosystem I (PSI) and Photosystem II (PSII). The majority of the previous photoinhibition studies have been conducted with PSII, which shows much larger photoinhibition than PSI; therefore, relatively little is known about the mechanism of PSI photoinhibition so far. A previous report showed that the photoinhibition action spectrum measured with PSI activity of isolated
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Glycinebetaine mitigated the photoinhibition of photosystem II at high temperature in transgenic tomato plants Photosynth. Res. (IF 3.216) Pub Date : 2021-01-04 Daxing Li, Mengwei Wang, Tianpeng Zhang, Xiao Chen, Chongyang Li, Yang Liu, Marian Brestic, Tony H. H. Chen, Xinghong Yang
Photosystem II (PSII), especially the D1 protein, is highly sensitive to the detrimental impact of heat stress. Photoinhibition always occurs when the rate of photodamage exceeds the rate of D1 protein repair. Here, genetically engineered codA-tomato with the capability to accumulate glycinebetaine (GB) was established. After photoinhibition treatment at high temperature, the transgenic lines displayed
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Coleataenia prionitis , a C 4 -like species in the Poaceae Photosynth. Res. (IF 3.216) Pub Date : 2021-01-03 Maho Tashima, Takayuki Yabiku, Osamu Ueno
C4-like plants represent the penultimate stage of evolution from C3 to C4 plants. Although Coleataenia prionitis (formerly Panicum prionitis) has been described as a C4 plant, its leaf anatomy and gas exchange traits suggest that it may be a C4-like plant. Here, we reexamined the leaf structure and biochemical and physiological traits of photosynthesis in this grass. The large vascular bundles were
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A process-based coupled model of stomatal conductance–photosynthesis–transpiration during leaf ontogeny for water-saving irrigated rice Photosynth. Res. (IF 3.216) Pub Date : 2021-01-03 Yuping Lv, Junzeng Xu, Xiaoyin Liu
Process-based coupled model of stomatal conductance–photosynthesis–transpiration was developed to estimate simultaneously stomatal conductance gsw, photosynthetic rate Pn, and transpiration rate Tr during leaf ontogeny. The modified Jarvis model was constructed by superposing the influence of leaf age LA on gsw in traditional Jarvis model. And the modified Farquhar model was constructed by incorporating
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The different patterns of post-heat stress responses in wheat genotypes: the role of the transthylakoid proton gradient in efficient recovery of leaf photosynthetic capacity Photosynth. Res. (IF 3.216) Pub Date : 2021-01-03 Erik Chovancek, Marek Zivcak, Marian Brestic, Sajad Hussain, Suleyman I. Allakhverdiev
The frequency and severity of heat waves are expected to increase in the near future, with a significant impact on physiological functions and yield of crop plants. In this study, we assessed the residual post-heat stress effects on photosynthetic responses of six diverse winter wheat (Triticum sp.) genotypes, differing in country of origin, taxonomy and ploidy (tetraploids vs. hexaploids). After 5 days
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Juggling Lightning: How Chlorella ohadii handles extreme energy inputs without damage Photosynth. Res. (IF 3.216) Pub Date : 2021-01-02 Isaac Kedem, Yuval Milrad, Aaron Kaplan, Iftach Yacoby
The green alga Chlorella ohadii was isolated from a desert biological soil crust, one of the harshest environments on Earth. When grown under optimal laboratory settings it shows the fastest growth rate ever reported for a photosynthetic eukaryote and a complete resistance to photodamage even under unnaturally high light intensities. Here we examined the energy distribution along the photosynthetic
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High photosynthetic capacity of Sahelian C 3 and C 4 plants Photosynth. Res. (IF 3.216) Pub Date : 2021-01-02 Thomas Sibret, Wim Verbruggen, Marc Peaucelle, Lore T. Verryckt, Marijn Bauters, Marie Combe, Pascal Boeckx, Hans Verbeeck
The semi-arid ecosystems of the African Sahel play an important role in the global carbon cycle and are among the most sensitive ecosystems to future environmental pressures. Still, basic data of photosynthetic characteristics of Sahelian vegetation are very limited, preventing us to properly understand these ecosystems and to project their response to future global changes. Here, we aim to study and
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Regulation of Phaeodactylum plastid gene transcription by redox, light, and circadian signals Photosynth. Res. (IF 3.216) Pub Date : 2021-01-02 Gilbert E. Kayanja, Iskander M. Ibrahim, Sujith Puthiyaveetil
Diatoms are a diverse group of photosynthetic unicellular algae with a plastid of red-algal origin. As prolific primary producers in the ocean, diatoms fix as much carbon as all rainforests combined. The molecular mechanisms that contribute to the high photosynthetic productivity and ecological success of diatoms are however not yet fully understood. Using the model diatom Phaeodactylum tricornutum
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The effect of some antiseptic drugs on the energy transfer in chromatophore photosynthetic membranes of purple non-sulfur bacteria Rhodobacter sphaeroides Photosynth. Res. (IF 3.216) Pub Date : 2021-01-02 Marina G. Strakhovskaya, Eugene P. Lukashev, Boris N. Korvatovskiy, Ekaterina G. Kholina, Nuranija Kh. Seifullina, Peter P. Knox, Vladimir Z. Paschenko
Chromatophores of purple non-sulfur bacteria (PNSB) are invaginations of the cytoplasmic membrane that contain a relatively simple system of light-harvesting protein–pigment complexes, a photosynthetic reaction center (RC), a cytochrome complex, and ATP synthase, which transform light energy into the energy of synthesized ATP. The high content of negatively charged phosphatidylglycerol (PG) and cardiolipin
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A tribute to Robert John Porra (august 7, 1931–may 16, 2019) Photosynth. Res. (IF 3.216) Pub Date : 2021-01-02 Wah Soon Chow, Antony W. D. Larkum, Erhard Pfündel, Raymond J. Ritchie, Hugo Scheer, Åke Strid
Robert John Porra (7.8.1931–16.5.2019) is probably best known for his substantial practical contributions to plant physiology and photosynthesis by addressing the problems of both the accurate spectroscopic estimation and the extractability of chlorophylls in many organisms. Physiological data and global productivity estimates, in particular of marine primary productivity, are often quoted on a chlorophyll
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Reconstruction of the absorption spectrum of Synechocystis sp. PCC 6803 optical mutants from the in vivo signature of individual pigments Photosynth. Res. (IF 3.216) Pub Date : 2020-11-27 David Fuente, Dusan Lazar, Jose Vicente Oliver-Villanueva, Javier F. Urchueguía
In this work, we reconstructed the absorption spectrum of different Synechocystis sp. PCC 6803 optical strains by summing the computed signature of all pigments present in this organism. To do so, modifications to in vitro pigment spectra were first required: namely wavelength shift, curve smoothing, and the package effect calculation derived from high pigment densities were applied. As a result, we
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Impaired chloroplast positioning affects photosynthetic capacity and regulation of the central carbohydrate metabolism during cold acclimation Photosynth. Res. (IF 3.216) Pub Date : 2020-11-19 Anastasia Kitashova, Katja Schneider, Lisa Fürtauer, Laura Schröder, Tim Scheibenbogen, Siegfried Fürtauer, Thomas Nägele
Photosynthesis and carbohydrate metabolism of higher plants need to be tightly regulated to prevent tissue damage during environmental changes. The intracellular position of chloroplasts changes due to a changing light regime. Chloroplast avoidance and accumulation response under high and low light, respectively, are well known phenomena, and deficiency of chloroplast movement has been shown to result
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Photosynthesis of the Cyanidioschyzon merolae cells in blue, red, and white light Photosynth. Res. (IF 3.216) Pub Date : 2020-11-24 Eugeniusz Parys, Tomasz Krupnik, Ilona Kułak, Kinga Kania, Elżbieta Romanowska
Photosynthesis and respiration rates, pigment contents, CO2 compensation point, and carbonic anhydrase activity in Cyanidioschizon merolae cultivated in blue, red, and white light were measured. At the same light quality as during the growth, the photosynthesis of cells in blue light was significantly lowered, while under red light only slightly decreased as compared with white control. In white light
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Proximity-based proteomics reveals the thylakoid lumen proteome in the cyanobacterium Synechococcus sp. PCC 7002 Photosynth. Res. (IF 3.216) Pub Date : 2020-12-06 Kelsey K. Dahlgren, Colin Gates, Thomas Lee, Jeffrey C. Cameron
Cyanobacteria possess unique intracellular organization. Many proteomic studies have examined different features of cyanobacteria to learn about the intracellular structures and their respective functions. While these studies have made great progress in understanding cyanobacterial physiology, the conventional fractionation methods used to purify cellular structures have limitations; specifically,
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Acclimation of Chlamydomonas reinhardtii to extremely strong light Photosynth. Res. (IF 3.216) Pub Date : 2020-12-06 Olli Virtanen, Sergey Khorobrykh, Esa Tyystjärvi
Most photosynthetic organisms are sensitive to very high light, although acclimation mechanisms enable them to deal with exposure to strong light up to a point. Here we show that cultures of wild-type Chlamydomonas reinhardtii strain cc124, when exposed to photosynthetic photon flux density 3000 μmol m−2 s−1 for a couple of days, are able to suddenly attain the ability to grow and thrive. We compared
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Correction to: The role of vibronic modes in formation of red antenna states of cyanobacterial PSI Photosynth. Res. (IF 3.216) Pub Date : 2020-12-03 Roman Y. Pishchalnikov, Vladimir V. Shubin, Andrei. P. Razjivin
The funding statement in the first sentence of the Acknowledgements section in the original publication is incorrect. The corrected Acknowledgements section is printed below.
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Phos-tag-based approach to study protein phosphorylation in the thylakoid membrane Photosynth. Res. (IF 3.216) Pub Date : 2020-12-02 Keiji Nishioka, Yusuke Kato, Shin-ichiro Ozawa, Yuichiro Takahashi, Wataru Sakamoto
Protein phosphorylation is a fundamental post-translational modification in all organisms. In photoautotrophic organisms, protein phosphorylation is essential for the fine-tuning of photosynthesis. The reversible phosphorylation of the photosystem II (PSII) core and the light-harvesting complex of PSII (LHCII) contribute to the regulation of photosynthetic activities. Besides the phosphorylation of
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Constant ratio of C c to C i under various CO 2 concentrations and light intensities, and during progressive drought, in seedlings of Japanese white birch Photosynth. Res. (IF 3.216) Pub Date : 2020-10-17 Mitsutoshi Kitao, Evgenios Agathokleous, Hisanori Harayama, Kenichi Yazaki, Hiroyuki Tobita
Constant mesophyll conductance (gm), and two-resistance gm model (involved in resistances of cell wall and chloroplast), where gm reaches maximum under higher CO2 concentrations, cannot describe the phenomenon that gm decreases with increasing intercellular CO2 concentration (Ci) under relatively higher CO2 concentrations. Yin et al. (2020) proposed a gm model, according to which the ratio of chloroplastic
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Interplay between formation of photosynthetic complexes and expression of genes for iron–sulfur cluster assembly in Rhodobacter sphaeroides ? Photosynth. Res. (IF 3.216) Pub Date : 2020-10-16 Xin Nie, Andreas Jäger, Janek Börner, Gabriele Klug
Formation of photosynthetic complexes leads to a higher demand for Fe–S clusters. We hypothesized that in the facultative phototrophic alpha-proteobacterium Rhodobacter sphaeroides expression of the isc-suf operon for Fe–S cluster formation may be increased under conditions that promote formation of photosynthetic complexes and that, vice versa, lack of the IscR regulator may also affect photosynthesis
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The structural basis of far-red light absorbance by allophycocyanins Photosynth. Res. (IF 3.216) Pub Date : 2020-10-14 Nathan Soulier, Donald A. Bryant
Phycobilisomes (PBS), the major light-harvesting antenna in cyanobacteria, are supramolecular complexes of colorless linkers and heterodimeric, pigment-binding phycobiliproteins. Phycocyanin and phycoerythrin commonly comprise peripheral rods, and a multi-cylindrical core is principally assembled from allophycocyanin (AP). Each AP subunit binds one phycocyanobilin (PCB) chromophore, a linear tetrapyrrole
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Enhanced fluorescence of photosynthetic pigments through conjugation with carbon quantum dots Photosynth. Res. (IF 3.216) Pub Date : 2020-10-09 Esranur Budak, Duğçar Erdoğan, Caner Ünlü
Light harvesting in photosynthesis is currently an issue on-debate and studied widely in all over the world. Studies on light harvesting mainly focus on enlightening molecular mechanism of the process and enhancing absorption capacity of light harvesting complexes (LHCs). Enhancement of absorption capacity of LHCs can be done either by natural methods or by synthetic methods. Quantum dots (QDs), fluorescent
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Photosynthesis on the edge: photoinhibition, desiccation and freezing tolerance of Antarctic bryophytes Photosynth. Res. (IF 3.216) Pub Date : 2020-10-08 Alicia Victoria Perera-Castro, Jaume Flexas, Águeda María González-Rodríguez, Beatriz Fernández-Marín
In Antarctica, multiple stresses (low temperatures, drought and excessive irradiance) hamper photosynthesis even in summer. We hypothesize that controlled inactivation of PSII reaction centres, a mechanism widely studied by pioneer work of Fred Chow and co-workers, may effectively guarantee functional photosynthesis under these conditions. Thus, we analysed the energy partitioning through photosystems
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A brief history of how microscopic studies led to the elucidation of the 3D architecture and macromolecular organization of higher plant thylakoids Photosynth. Res. (IF 3.216) Pub Date : 2020-10-05 L. Andrew Staehelin, Dominick J. Paolillo
Microscopic studies of chloroplasts can be traced back to the year 1678 when Antonie van Leeuwenhoek reported to the Royal Society in London that he saw green globules in grass leaf cells with his single-lens microscope. Since then, microscopic studies have continued to contribute critical insights into the complex architecture of chloroplast membranes and how their structure relates to function. This
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Chloramphenicol enhances Photosystem II photodamage in intact cells of the cyanobacterium Synechocystis PCC 6803 Photosynth. Res. (IF 3.216) Pub Date : 2020-09-26 Sandeesha Kodru, Ateeq ur Rehman, Imre Vass
The effect of chloramphenicol, an often used protein synthesis inhibitor, in photosynthetic systems was studied on the rate of Photosystem II (PSII) photodamage in the cyanobacterium Synechocystis PCC 6803. Light-induced loss of PSII activity was compared in the presence of chloramphenicol and another protein synthesis inhibitor, lincomycin, by measuring the rate of oxygen evolution in Synechocystis
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Time- and reduction-dependent rise of photosystem II fluorescence during microseconds-long inductions in leaves. Photosynth. Res. (IF 3.216) Pub Date : 2020-09-12 Vello Oja,Agu Laisk
Lettuce (Lactuca sativa) and benth (Nicotiana benthamiana) leaves were illuminated with 720 nm background light to mix S-states and oxidize electron carriers. Green-filtered xenon flashes of different photon dose were applied and O2 evolution induced by a flash was measured. After light intensity gradient across the leaf was mathematically considered, the flash-induced PSII electron transport (= 4·O2
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The relationship between anthocyanin accumulation and photoprotection in young leaves of two dominant tree species in subtropical forests in different seasons. Photosynth. Res. (IF 3.216) Pub Date : 2020-09-09 Zheng-Chao Yu,Wei Lin,Xiao-Ting Zheng,Wah Soon Chow,Yan-Na Luo,Min-Ling Cai,Chang-Lian Peng
Increasing amounts of experimental evidence show that anthocyanins provide physiological protection to plants under stress. However, the difference in photoprotection mediated by anthocyanins and other photoprotective substances in different seasons is still uncertain. To determine the relationship between anthocyanin accumulation and the photoprotective effects in different seasons, Castanopsis chinensis
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Do rapid photosynthetic responses protect maize leaves against photoinhibition under fluctuating light? Photosynth. Res. (IF 3.216) Pub Date : 2020-08-11 Mei-Yu Qiao,Ya-Jun Zhang,Li-An Liu,Lei Shi,Qing-Hu Ma,Wah Soon Chow,Chuang-Dao Jiang
Plants in their natural environment are often exposed to fluctuating light because of self-shading and cloud movements. As changing frequency is a key characteristic of fluctuating light, we speculated that rapid light fluctuation may induce rapid photosynthetic responses, which may protect leaves against photoinhibition. To test this hypothesis, maize seedlings were grown under fluctuating light with
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Temperature-dependent regulation of electron transport and ATP synthesis in chloroplasts in vitro and in silico. Photosynth. Res. (IF 3.216) Pub Date : 2020-08-11 Alexander N Tikhonov,Alexey V Vershubskii
The significance of temperature-dependent regulation of photosynthetic apparatus (PSA) is determined by the fact that plant temperature changes with environmental temperature. In this work, we present a brief overview of temperature-dependent regulation of photosynthetic processes in class B chloroplasts (thylakoids) and analyze these processes using a computer model that takes into account the key
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Regulation of photosystem I-light-harvesting complex I from a red alga Cyanidioschyzon merolae in response to light intensities. Photosynth. Res. (IF 3.216) Pub Date : 2020-08-06 Lijing Chang,Lirong Tian,Fei Ma,Zhiyuan Mao,Xiaochi Liu,Guangye Han,Wenda Wang,Yanyan Yang,Tingyun Kuang,Jie Pan,Jian-Ren Shen
Photosynthetic organisms use different means to regulate their photosynthetic activity in respond to different light conditions under which they grow. In this study, we analyzed changes in the photosystem I (PSI) light-harvesting complex I (LHCI) supercomplex from a red alga Cyanidioschyzon merolae, upon growing under three different light intensities, low light (LL), medium light (ML), and high light
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The role of vibronic modes in formation of red antenna states of cyanobacterial PSI. Photosynth. Res. (IF 3.216) Pub Date : 2020-08-06 Roman Y Pishchalnikov,Vladimir V Shubin,Andrei P Razjivin
Cyanobacterial photosystem I (PSI) constitutes monomeric and trimeric pigment–protein complexes whose optical properties are marked by the presence of long-wavelength absorption bands. In spite of numerous experimental studies, the nature of these bands is still under debate and requires intensive theoretical analysis. Collecting together the data of linear spectroscopy and single-molecule spectroscopy
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Model quantification of the light-induced thylakoid membrane processes in Synechocystis sp. PCC 6803 in vivo and after exposure to radioactive irradiation. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-30 N E Belyaeva,A A Bulychev,K E Klementiev,V Z Paschenko,G Yu Riznichenko,A B Rubin
Measurements of OJIP–SMT patterns of fluorescence induction (FI) in Synechocystis sp. PCC 6803 (Synechocystis) cells on a time scale up to several minutes were mathematically treated within the framework of thylakoid membrane (T-M) model (Belyaeva et al., Photosynth Res 140:1–19, 2019) that was renewed to account for the state transitions effects. Principles of describing electron transfer in reaction
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Photosynthetic performance of Antarctic lichen Dermatocarpon polyphyllizum when affected by desiccation and low temperatures. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-27 Michaela Bednaříková,Peter Váczi,Dušan Lazár,Miloš Barták
Lichens are symbiotic organisms that are well adapted to desiccation/rehydration cycles. Over the last decades, the physiological background of their photosynthetic response—specifically activation of the protective mechanism during desiccation—has been studied at the level of photosystem II of the lichen photobiont by means of several biophysical methods. In our study, the effects of desiccation and
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Phycobilisome integrity and functionality in lipid unsaturation and xanthophyll mutants in Synechocystis. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-27 Sindhujaa Vajravel,Hajnalka Laczkó-Dobos,Nia Petrova,Éva Herman,Terézia Kovács,Tomas Zakar,Svetla Todinova,Stefka Taneva,Lászlo Kovács,Zoltan Gombos,Tünde Tóth,Sashka Krumova
The major light-harvesting system in cyanobacteria, the phycobilisome, is an essential component of the photosynthetic apparatus that regulates the utilization of the natural light source—the Sun. Earlier works revealed that the thylakoid membrane composition and its physical properties might have an important role in antennas docking. Polyunsaturated lipids and xanthophylls are among the most significant
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Characterization of cyanobacterial allophycocyanins absorbing far-red light. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-24 Nathan Soulier,Tatiana N Laremore,Donald A Bryant
Phycobiliproteins (PBPs) are pigment proteins that comprise phycobilisomes (PBS), major light-harvesting antenna complexes of cyanobacteria and red algae. PBS core substructures are made up of allophycocyanins (APs), a subfamily of PBPs. Five paralogous AP subunits are encoded by the Far-Red Light Photoacclimation (FaRLiP) gene cluster, which is transcriptionally activated in cells grown in far-red
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Low-molecular-weight ligands in plants: role in metal homeostasis and hyperaccumulation. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-11 I V Seregin,A D Kozhevnikova
Mineral nutrition is one of the key factors determining plant productivity. In plants, metal homeostasis is achieved through the functioning of a complex system governing metal uptake, translocation, distribution, and sequestration, leading to the maintenance of a regulated delivery of micronutrients to metal-requiring processes as well as detoxification of excess or non-essential metals. Low-molecular-weight
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How do rice seedlings of landrace Pokkali survive in saline fields after transplantation? Physiology, biochemistry, and photosynthesis. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-06 Manjari Mishra,Silas Wungrampha,Gautam Kumar,Sneh Lata Singla-Pareek,Ashwani Pareek
Rice, one of the most important staple food crops in the world, is highly sensitive to soil salinity at the seedling stage. The ultimate yield of this crop is a function of the number of seedlings surviving after transplantation in saline water. Oryza sativa cv. IR64 is a high-yielding salinity-sensitive variety, while Pokkali is a landrace traditionally cultivated by the local farmers in the coastal
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Bound detergent molecules in bacterial reaction centers facilitate detection of tetryl explosive. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-06 Daniel Modafferi,Valter Zazubovich,László Kálmán
Bacterial reaction centers (BRC) from Rhodobacter sphaeroides were found to accelerate, about 100-fold, the reaction between tetryl (2,4,6-trinitrophenylmethylnitramine) explosive and n-lauryl-N-N-dimethylamine-N-oxide (LDAO) that results in the formation of picric acid-like product with characteristic UV–VIS absorption spectrum with peaks at 345 and 415 nm. Moreover, this product also affects the
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Amelioration of plant responses to drought under elevated CO2 by rejuvenating photosynthesis and nitrogen use efficiency: implications for future climate-resilient crops. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-06 Kalva Madhana Sekhar,Vamsee Raja Kota,T Papi Reddy,K V Rao,Attipalli Ramachandra Reddy
The contemporary global agriculture is beset with serious threats from diverse eco-environmental conditions causing decreases in crop yields by ~ 15%. These yield losses might increase further due to climate change scenarios leading to increased food prices triggering social unrest and famines. Urbanization and industrialization are often associated with rapid increases in greenhouse gases (GHGs) especially
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pH dependence of photosystem II photoinhibition: relationship with structural transition of oxygen-evolving complex at the pH of thylakoid lumen. Photosynth. Res. (IF 3.216) Pub Date : 2020-06-29 L N Davletshina,B K Semin
Ca-depleted photosystem II membranes (PSII[-Ca]) do not contain PsbP and PsbQ proteins protecting the Mn4CaO5 cluster of the PSII oxygen-evolving complex (OEC). Therefore, the Mn ions in the PSII(-Ca) membranes can be reduced by exogenous bulky reductants or the charged reductant Fe(II). We have recently found that the resistance of Mn ions in the OEC to the Fe(II) action is pH dependent and that this
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Electron transport in Tradescantia leaves acclimated to high and low light: thermoluminescence, PAM-fluorometry, and EPR studies. Photosynth. Res. (IF 3.216) Pub Date : 2020-06-27 Olesya A Kalmatskaya,Boris V Trubitsin,Igor S Suslichenko,Vladimir A Karavaev,Alexander N Tikhonov
Using thermoluminescence, PAM-fluorometry, and electron paramagnetic resonance (EPR) for assaying electron transport processes in chloroplasts in situ, we have compared photosynthetic characteristics in Tradescantia fluminensis leaves grown under low light (LL, 50–125 µmol photons m−2 s−1) or high light (HL, 875–1000 µmol photons m−2 s−1) condition. We found differences in the thermoluminescence (TL)
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Regulation of chloroplast primary metabolism. Photosynth. Res. (IF 3.216) Pub Date : 2020-07-01 Ute Armbruster,Deserah D Strand
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The diversity and distribution of D1 proteins in cyanobacteria. Photosynth. Res. (IF 3.216) Pub Date : 2020-06-18 Kevin J Sheridan,Elizabeth J Duncan,Julian J Eaton-Rye,Tina C Summerfield
The psbA gene family in cyanobacteria encodes different forms of the D1 protein that is part of the Photosystem II reaction centre. We have identified a phylogenetically distinct D1 group that is intermediate between previously identified G3-D1 and G4-D1 proteins (Cardona et al. Mol Biol Evol 32:1310–1328, 2015). This new group contained two subgroups: D1INT, which was frequently in the genomes of
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Growth model of chlorosome antenna by the environment-dependent stepwise assembly of a zinc chlorophyll derivative. Photosynth. Res. (IF 3.216) Pub Date : 2020-06-15 Shogo Matsubara,Hitoshi Tamiaki
A zinc chlorophyll derivative possessing an oligoethylene glycol ester at the 17-propionate residue was prepared as a model of specific pigments in chlorosomes, such as bacteriochlorophylls-c, d, and e, by chemical modification of naturally occurring chlorophyll-a. The zinc chlorophyll derivative aggregated in aqueous or hexane solutions containing 1% (v/v) ethanol to give red-shifted and broadened
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Editorial for the special issue on photosynthesis and hydrogen energy research for sustainability-2019. Photosynth. Res. (IF 3.216) Pub Date : 2020-06-11 Suleyman I Allakhverdiev
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Neutron scattering in photosynthesis research: recent advances and perspectives for testing crop plants. Photosynth. Res. (IF 3.216) Pub Date : 2020-06-02 Gergely Nagy,Győző Garab
The photosynthetic performance of crop plants under a variety of environmental factors and stress conditions, at the fundamental level, depends largely on the organization and structural flexibility of thylakoid membranes. These highly organized membranes accommodate virtually all protein complexes and additional compounds carrying out the light reactions of photosynthesis. Most regulatory mechanisms
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The major photoprotective role of anthocyanins in leaves of Arabidopsis thaliana under long-term high light treatment: antioxidant or light attenuator? Photosynth. Res. (IF 3.216) Pub Date : 2020-05-27 Xiao-Ting Zheng,Zheng-Chao Yu,Jun-Wei Tang,Min-Ling Cai,Yi-Lin Chen,Cheng-Wei Yang,Wah Soon Chow,Chang-Lian Peng
Anthocyanins are water-soluble pigments in plants known for their photoprotective role against photoinhibitory and photooxidative damage under high light (HL). However, it remains unclear whether light-shielding or antioxidant activity plays a major role in the photoprotection exerted by anthocyanins under HL stress. To shed light on this question, we analyzed the physiological and biochemical responses
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From δ-aminolevulinic acid to chlorophylls and every step in between: in memory of Constantin (Tino) A. Rebeiz, 1936-2019. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-26 Govindjee Govindjee,Donald P Briskin,Christoph Benning,Henry Daniell,Vladimir Kolossov,Hugo Scheer,Mark Rebeiz
Constantin A. (Tino) Rebeiz, a pioneer in the field of chlorophyll biosynthesis, and a longtime member of the University of Illinois community of plant biologists, passed away on July 25, 2019. He came to the USA at a time that was difficult for members of minority groups to be in academia. However, his passion for the complexity of the biochemical origin of chlorophylls drove a career in basic sciences
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Reversible inhibition and reactivation of electron transfer in photosystem I. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-23 Neva Agarwala,Hiroki Makita,Lujun Luo,Wu Xu,Gary Hastings
In photosystem I (PSI) complexes at room temperature electron transfer from A1- to FX is an order of magnitude faster on the B-branch compared to the A-branch. One factor that might contribute to this branch asymmetry in time constants is TrpB673 (Thermosynechococcus elongatus numbering), which is located between A1B and FX. The corresponding residue on the A-branch, between A1A and FX, is GlyA693
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A comparative look at structural variation among RC-LH1 'Core' complexes present in anoxygenic phototrophic bacteria. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-19 Alastair T Gardiner,Tu C Nguyen-Phan,Richard J Cogdell
All purple photosynthetic bacteria contain RC-LH1 'Core' complexes. The structure of this complex from Rhodobacter sphaeroides, Rhodopseudomonas palustris and Thermochromatium tepidum has been solved using X-ray crystallography. Recently, the application of single particle cryo-EM has revolutionised structural biology and the structure of the RC-LH1 'Core' complex from Blastochloris viridis has been
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Characterization of Sll1558 in environmental stress tolerance of Synechocystis sp. PCC 6803. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-18 Junji Uchiyama,Yutaro Ito,Ayumi Matsuhashi,Yuta Ichikawa,Mamoru Sambe,Shuichi Kitayama,Yuka Yoshino,Atushi Moriyama,Hidetaka Kohga,Satoru Ogawa,Hisataka Ohta
So far, the molecular mechanisms underlying the acidic-stress responses of plants are complicated and only fragmentally understood. Here, we investigated the mechanisms responsible for acidic-stress acclimation. Previously, DNA microarray analysis identified the sll1558 gene in Synechocystis sp. PCC 6803 (hereafter called Synechocystis 6803) to be upregulated following short-term acid treatment (1
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Nature of low-energy exciton levels in light-harvesting complex II of green plants as revealed by satellite hole structure. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-13 Jörg Pieper,Klaus-Dieter Irrgang
Persistent non-photochemical hole burning at 4.2 K is an efficient experimental tool to unravel position and nature of low-energy excitonic states in pigment-protein complexes. This is demonstrated here for the case of the trimeric chlorophyll (Chl) a/b light-harvesting complexes of Photosystem II (LHC II) of green plants, where previous work (Pieper et al. J Phys Chem B 103:2412, 1999a) reported a
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Photoprotection mechanisms under different CO2 regimes during photosynthesis in a green alga Chlorella variabilis. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-07 Yoshifumi Ueno,Ginga Shimakawa,Shimpei Aikawa,Chikahiro Miyake,Seiji Akimoto
Oxygenic photosynthesis converts light energy into chemical energy via electron transport and assimilates CO2 in the Calvin-Benson cycle with the chemical energy. Thus, high light and low CO2 conditions induce the accumulation of electrons in the photosynthetic electron transport system, resulting in the formation of reactive oxygen species. To prevent the accumulation of electrons, oxygenic photosynthetic
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A novel insight into the mode of action of glufosinate: how reactive oxygen species are formed. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-05 Hudson K Takano,Roland Beffa,Christopher Preston,Philip Westra,Franck E Dayan
Glufosinate targets glutamine synthetase (GS), but its fast herbicidal action is triggered by reactive oxygen species (ROS). The relationship between GS inhibition and ROS accumulation was investigated in Amaranthus palmeri. Glufosinate's fast action is light-dependent with no visual symptoms or ROS formation in the dark. Inhibition of GS leads to accumulation of ammonia and metabolites of the photorespiration
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Biodegradation of phenol by Chlamydomonas reinhardtii. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-02 Theocharis T Nazos,Leonidas Mavroudakis,Spiros A Pergantis,Demetrios F Ghanotakis
The data presented in this particular study demonstrate that the biodegradation of phenol by Chlamydomonas reinhardtii is a dynamic bioenergetic process mainly affected by the production of catechol and the presence of a growth-promoting substrate in the culture medium. The study focused on the regulation of the bioenergetic equilibrium resulting from production of catechol after phenol oxidation.
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Role of cyclic electron transport mutations pgrl1 and pgr5 in acclimation process to high light in Chlamydomonas reinhardtii. Photosynth. Res. (IF 3.216) Pub Date : 2020-04-29 Ranay Mohan Yadav,Sabit Mohammad Aslam,Sai Kiran Madireddi,Nisha Chouhan,Rajagopal Subramanyam
Light is crucial for photosynthesis, but the amount of light that exceeds an organism's assimilation efficacy can lead to photo-oxidative damage and even cell death. In Chlamydomonas (C). reinhardtii cyclic electron flow (CEF) is very important for the elicitation of non-photochemical quenching (NPQ) by controlling the acidification of thylakoid lumen. This process requires the cooperation of proton
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Ultrafast processes in photosynthetic light-harvesting. Photosynth. Res. (IF 3.216) Pub Date : 2020-05-01 Emilie Wientjes,Petar Lambrev
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Role of PsbV-Tyr137 in photosystem II studied by site-directed mutagenesis in the thermophilic cyanobacterium Thermosynechococcus vulcanus. Photosynth. Res. (IF 3.216) Pub Date : 2020-04-27 Yanan Xiao,Qingjun Zhu,Yanyan Yang,Wenda Wang,Tingyun Kuang,Jian-Ren Shen,Guangye Han
PsbV (cytochrome c550) is one of the three extrinsic proteins of photosystem II (PSII) and functions to maintain the stability and activity of the Mn4CaO5 cluster, the catalytic center for water oxidation. PsbV-Y137 is the C-terminal residue of PsbV and is located at the exit of a hydrogen-bond network mediated by the D1-Y161-H190 residue pair. In order to examine the function of PsbV-Y137, four mutants
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