Perspectives on the structure of the photosynthetic oxygen evolving manganese complex and its relation to the Kok cycle.

abstract：:We present a theoretical study of excitation dynamics in the chlorosome antenna complex of green photosynthetic bacteria based on a recently proposed model for the molecular assembly. Our model for the excitation energy transfer (EET) throughout the antenna combines a stochastic time propagation of the excitonic wave ...

journal_title：Photosynthesis research

authors： Fujita T,Huh J,Saikin SK,Brookes JC,Aspuru-Guzik A

更新日期：2014-06-01 00:00:00

abstract：:Energy transfer of the light harvesting complex LHC-II trimer, extracted from spinach, was studied in the Q(y) region at room temperature by femtosecond transient absorption spectroscopy. Configuration interaction exciton method [Linnanto et al. (1999) J Phys Chem B 103: 8739-8750] and 2.72 A structural information re...

journal_title：Photosynthesis research

authors： Linnanto J,Martiskainen J,Lehtovuori V,Ihalainen J,Kananavicius R,Barbato R,Korppi-Tommola J

更新日期：2006-03-01 00:00:00

abstract：:Free ribulose hisphosphate (RuBP(4-)) rather than its magnesium complex (RuBP-Mg(2-)) was the apparent substrate for spinach ribulose bisphosphate carboxylase/oxygenase. The apparent Km for total RuBP (pH 8.0 at 30° C) increased with increasing Mg(2+) concentrations from 11.6 μM at 13.33 mM Mg(2+) to 32.6 μM at 40.33 ...

journal_title：Photosynthesis research

authors： Roach DJ,McFadden BA

更新日期：1983-01-01 00:00:00

abstract：:By recording leaf transmittance at 820 nm and quantifying the photon flux density of far red light (FRL) absorbed by long-wavelength chlorophylls of Photosystem I (PS I), the oxidation kinetics of electron carriers on the PS I donor side was mathematically analyzed in sunflower (Helianthus annuus L.), tobacco (Nicotia...

journal_title：Photosynthesis research

authors： Oja V,Eichelmann H,Peterson RB,Rasulov B,Laisk A

更新日期：2003-01-01 00:00:00

abstract：:Oxygen may enhance CO2-saturated photosynthesis in intact leaves, which display the Warburg effect when illuminated at the current atmospheric level of CO2 and O2, of about 350 microl l(-1) and 21%, respectively. The magnitude of the stimulation depends on irradiance. The K(M)(O2) of the stimulation is 128 microM (10....

journal_title：Photosynthesis research

authors： Viil J,Ivanova H,Pärnik T

更新日期：2006-06-01 00:00:00

abstract：:A guided tour through much of photosynthesis research as I saw it, 1936-2001, is presented here. For earlier perspectives, see Myers 1974 (Plant Physiol 54: 420-426) and 1996 (Photosynth Res 50: 195-208). ...

journal_title：Photosynthesis research

authors： Myers J

更新日期：2002-01-01 00:00:00

abstract：:In polyploid plants the photosynthetic rate per cell is correlated with the amount of DNA per cell. The photosynthetic rate per unit leaf area is the product of the rate per cell times the number of photosynthetic cells per unit area. Therefore, the photosynthetic rate per unit leaf area will increase if there is a le...

journal_title：Photosynthesis research

authors： Warner DA,Edwards GE

更新日期：1993-02-01 00:00:00

abstract：:In this brief report, we provide a pictorial essay on an international conference "Photosynthesis Research for Sustainability-2013 in honor of Jalal A. Aliyev" that was held in Baku, Azerbaijan, during June 5-9, 2013 ( http://photosynthesis2013.cellreg.org/ ). We begin this report with a brief note on Jalal Aliyev, th...

journal_title：Photosynthesis research

authors： Allakhverdiev SI,Huseynova IM,Govindjee

更新日期：2013-12-01 00:00:00

abstract：:The linear, four-step oxidation of water to molecular oxygen by photosystem II requires cooperation between redox reactions driven by light and a set of redox reactions involving the S-states within the oxygen-evolving complex. The oxygenevolving complex is a highly ordered structure in which a number of polypeptides ...

journal_title：Photosynthesis research

authors： Ghanotakis DF,Yocum CF

更新日期：1985-01-01 00:00:00

abstract：:The biogenesis and oxygen-evolving activity of cyanobacterial Photosystem II (PSII) is dependent on a number of accessory proteins not found in the crystallised dimeric complex. These include Psb27, a small lipoprotein attached to the lumenal side of PSII, which has been assigned a role in regulating the assembly of t...

journal_title：Photosynthesis research

authors： Michoux F,Takasaka K,Boehm M,Komenda J,Nixon PJ,Murray JW

更新日期：2012-02-01 00:00:00

abstract：:The effects of root applications of kinetin, gibberellic acid (GA3) and indoleacetic acid (IAA) on photosynthesis was measured using an open infrared CO2 gas-exchange system. There was a 30-35% increase in the photosynthetic rates (mg CO2/dm(2)/hr) of attached leaves within 8 hr following root treatment with 0.47 μM k...

journal_title：Photosynthesis research

authors： Dong CN,Arteca RN

更新日期：1982-01-01 00:00:00

abstract：:The first research paper on photosynthesis in China was published by T.T. Li(2) in 1929. Two photosynthesis laboratories were established in Shanghai and Beijing in the 1950s and the 1960s, respectively. A photophosphorylation 'intermediate' was discovered after the energy conversion process was separated into light a...

journal_title：Photosynthesis research

authors： Kuang TY,Xu C,Li LB,Shen YK

更新日期：2003-01-01 00:00:00

abstract：:The photosynthetic green sulfur bacterium Chlorobaculum (Cba.) tepidum produces bacteriochlorophyll (BChl) c pigments bearing a chiral 1-hydroxyethyl group at the 3-position, which self-aggregate to construct main light-harvesting antenna complexes, chlorosomes. The secondary alcoholic hydroxy group is requisite for c...

journal_title：Photosynthesis research

authors： Teramura M,Harada J,Tamiaki H

更新日期：2016-12-01 00:00:00

abstract：:The absorption spectra of two light harvesting complexes from higher plants, CP29 and LHC II, have been analysed in the Soret region in order to obtain a description in terms of the absorption spectra of the individual pigments. This information is of great practical use when applying spectroscopic techniques to the s...

journal_title：Photosynthesis research

authors： Croce R,Cinque G,Holzwarth AR,Bassi R

更新日期：2000-01-01 00:00:00

abstract：:The unicellular green alga Chlamydomonas reinhardtii acclimates to low-CO2 (LC) conditions by actively transporting inorganic carbon (Ci) into the cell, resulting in an increase in photosynthetic efficiency. This mechanism is called the carbon-concentrating mechanism (CCM), and soluble protein LCIB is essential for th...

journal_title：Photosynthesis research

authors： Yamano T,Asada A,Sato E,Fukuzawa H

更新日期：2014-09-01 00:00:00

abstract：:The role of photosynthetic pigments in the development of separation methods in biochemistry during the period 1900-1980 is described beginning with M. Tswett who introduced separation of chlorophylls and carotenoids on columns and coined the term chromatography in 1906. In Uppsala, T. Svedberg developed the ultracent...

journal_title：Photosynthesis research

authors： Albertsson PA

更新日期：2003-01-01 00:00:00

abstract：:Chlorosomes of green photosynthetic bacteria are the most amazing example of long-range ordered natural light-harvesting antennae. Chlorosomes are the largest among all known photosynthetic light-harvesting structures (~ 104-105 pigments in the aggregated state). The chlorosomal bacteriochlorophyll (BChl) c/d/e molecu...

journal_title：Photosynthesis research

authors： Yakovlev AG,Taisova AS,Fetisova ZG

更新日期：2020-12-01 00:00:00

abstract：:The nucleotide sequences of the genes coding for the subunits of the Photosystem I (PS I) core, PsaA and PsaB were determined for the marine prokaryotic oxyphototrophs Prochlorococcus sp. MED4 (CCMP1378), P. marinus SS120 (CCMP1375) and Synechococcus sp. WH7803. Divergence of these sequences from those of both freshwa...

journal_title：Photosynthesis research

authors： van der Staay GW,Moon-van der Staay SY,Garczarek L,Partensky F

更新日期：2000-01-01 00:00:00

abstract：:The effect of temperatures between 15 and 50°C on the light utilization efficiency of leaf net photosynthesis was studied in two C4 grasses and two C3 legumes. In the legumes, light utilization efficiency (μ mol of CO2 fixed per μ Einstein of incident photosynthetic quantum flux) declined linearly with temperature bet...

journal_title：Photosynthesis research

authors： Ludlow MM

更新日期：1981-12-01 00:00:00

abstract：:We have used antibodies generated against synthetic peptides to determine the topology of the 43 kD chlorophyll a binding protein (CP 43) of Photosystem II. Based on the pattern of proteolytic fragments detected (on western blots) by peptide specific antibodies, a six transmembrane span topological model, with the ami...

journal_title：Photosynthesis research

authors： Sayre RT,Wrobel-Boerner EA

更新日期：1994-04-01 00:00:00

abstract：:This article gives an historical overview of our group's research on various metabolite translocators of chloroplasts, such as the translocators for phosphorylated intermediates of the Calvin-Benson cycle and of glycolysis, of ADP and ATP, of dicarboxylates, of pyruvate and of hexoses; how it began and where it led to...

journal_title：Photosynthesis research

authors： Heldt HW

更新日期：2002-01-01 00:00:00

abstract：:Temperature response of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) catalytic properties directly determines the CO2 assimilation capacity of photosynthetic organisms as well as their survival in environments with different thermal conditions. Despite unquestionable importance of Rubisco, the comprehensi...

journal_title：Photosynthesis research

authors： Galmés J,Kapralov MV,Copolovici LO,Hermida-Carrera C,Niinemets Ü

更新日期：2015-02-01 00:00:00

abstract：:Illumination of the dark-incubated cells of Synechocystis PCC6803 caused recovery of both respiratory activity of oxygen uptake and PS I-cyclic electron flow, which was monitored by the dark reduction of P700(+) in the presence of DCMU after a 50 ms pulse light (MT) under background far-red light, but the effects were...

journal_title：Photosynthesis research

authors： Mi H,Deng Y,Tanaka Y,Hibino T,Takabe T

更新日期：2001-01-01 00:00:00

abstract：:It has been known for some time that bicarbonate reverses the inhibition, by formate under HCO3 (-)-depletion conditions, of electron transport in thylakoid membranes. It has been shown that the major effect is on the electron acceptor side of photosystem II, at the site of plastoquinone reduction. After presenting a ...

journal_title：Photosynthesis research

authors： Blubaugh DJ,Govindjee

更新日期：1988-01-01 00:00:00

abstract：:Recent magnetic-resonance work on YŻ suggests that this species exhibits considerable motional flexibility in its functional site and that its phenol oxygen is not involved in a well-ordered hydrogen-bond interaction (Tang et al., submitted; Tommos et al., in press). Both of these observations are inconsistent with a ...

journal_title：Photosynthesis research

authors： Hoganson CW,Lydakis-Simantiris N,Tang XS,Tommos C,Warncke K,Babcock GT,Diner BA,McCracken J,Styring S

更新日期：1995-11-01 00:00:00

abstract：:The filamentous nitrogen-fixing cyanobacterium, Anabaena sp. strain PCC 7120 was found to tolerate very high doses of 60Co-gamma radiation or prolonged desiccation. Post-stress, cells remained intact and revived all the vital functions. A remarkable capacity to repair highly disintegrated genome and recycle the damage...

journal_title：Photosynthesis research

authors： Singh H,Anurag K,Apte SK

更新日期：2013-10-12 00:00:00

abstract：:The Mg-dechelating activity of extracts of Chenopodium album (goosefoot) was investigated using an artificial substrate, chlorophyllin a. The activity was measured spectrophotometrically by the formation of a reaction product, pheophorbin a (Mg-free chlorin), after release of the central Mg. The Mg-releasing protein w...

journal_title：Photosynthesis research

authors： Suzuki T,Shioi Y

更新日期：2002-01-01 00:00:00

abstract：:The excitation energy transfer between carotenoid and chlorophyll (Chl) in the cytochrome b ( 6 ) f complex from Bryopsis corticulans (B. corticulans), in which the carotenoid is 9-cis-alpha-carotene, was investigated by means of fluorescence excitation and sub-microsecond time-resolved absorption spectroscopies. The ...

journal_title：Photosynthesis research

authors： Li BX,Zuo P,Chen XB,Li LB,Zhang JP,Zhang JP,Kuang TY

更新日期：2006-04-01 00:00:00

abstract：:Photoacclimation by strains of Haslea "blue" diatom species H. ostrearia and H. silbo sp. nov. ined. was investigated with rapid light curves and induction-recovery curves using fast repetition rate fluorescence. Cultures were grown to exponential phase under 50 µmol m-2 s-1 photosynthetic available radiation (PAR) an...

journal_title：Photosynthesis research

authors： Perkins R,Williamson C,Lavaud J,Mouget JL,Campbell DA

更新日期：2018-09-01 00:00:00

abstract：:Modulation of the efficiency with which leaves convert absorbed light to photochemical energy [intrinsic efficiency of open photosystem II (PSII) centers, as the ratio of variable to maximal chlorophyll fluorescence] as well as leaf xanthophyll composition (interconversions of the xanthophyll cycle pigments violaxanth...

journal_title：Photosynthesis research

authors： Demmig-Adams B,Cohu CM,Muller O,Adams WW 3rd

更新日期：2012-09-01 00:00:00