Polyamines stimulate non-photochemical quenching of chlorophyll a fluorescence in Scenedesmus obliquus.

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：:To investigate the impact of iron deficiency on bioenergetic pathways in Chlamydomonas, we compared growth rates, iron content, and photosynthetic parameters systematically in acetate versus CO(2)-grown cells. Acetate-grown cells have, predictably (2-fold) greater abundance of respiration components but also, counter-...

journal_title：Photosynthesis research

authors： Terauchi AM,Peers G,Kobayashi MC,Niyogi KK,Merchant SS

更新日期：2010-07-01 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：:The analysis of primary and secondary nitrogen metabolism in plants by nuclear magnetic resonance (NMR) spectroscopy is comprehensively reviewed. NMR is a versatile analytical tool, and the combined use of (1)H, (2)H, (13)C, (14)N and (15)N NMR allows detailed investigation of the acquisition, assimilation and metabol...

journal_title：Photosynthesis research

authors： Mesnard F,Ratcliffe RG

更新日期：2005-01-01 00:00:00

abstract：:Recommendations are given for naming of genes coding for reaction center, antenna and electron transport proteins in green photosynthetic bacteria and heliobacteria. ...

journal_title：Photosynthesis research

authors： Bryant DA

更新日期：1994-07-01 00:00:00

abstract：:The problem of predicting the kinetics of proton efflux and the decay of the internal proton concentration for vesicles containing one or more buffers for which the internal proton concentration is initially higher than that of the surrounding medium is examined. An analytical solution is derived that describes the ti...

journal_title：Photosynthesis research

authors： Whitmarsh J

更新日期：1987-01-01 00:00:00

abstract：:Thylakoids are complex sub-organellar membrane systems whose role in photosynthesis makes them critical to life. Thylakoids require the coordinated expression of both nuclear- and plastid-encoded proteins to allow rapid response to changing environmental conditions. Transport of cytoplasmically synthesized proteins to...

journal_title：Photosynthesis research

authors： New CP,Ma Q,Dabney-Smith C

更新日期：2018-12-01 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：:The effect of leaf water potential (Ψ) on net CO2 assimilation rate (A), stomatal conductance (g), transpiration (E) and water-use efficiency (WUE) was measured for three cultivars of cacao (Theobroma cacao L.) seedlings during three recurrent drought cycles. Net assimilation varied greatly at high water potentials, b...

journal_title：Photosynthesis research

authors： Joly RJ,Hahn DT

更新日期：1989-09-01 00:00:00

abstract：:A fluorescence video imaging system utilizing relatively inexpensive commercial components is described. The instrument utilizes a black and white CCD video camera detector, a commercial video imaging board and a IBM-AT compatible computer. The color output of the imaging board greatly aids in the users ability to vis...

journal_title：Photosynthesis research

authors： Fenton JM,Crofts AR

更新日期：1990-10-01 00:00:00

abstract：:Heliobacteria contain Type I reaction centers (RCs) and a homodimeric core, but unlike green sulfur bacteria, they do not contain an extended antenna system. Given their simplicity, the heliobacterial RC (HbRC) should be ideal for the study of a prototypical homodimeric RC. However, there exist enormous gaps in our kn...

journal_title：Photosynthesis research

authors： Heinnickel M,Golbeck JH

更新日期：2007-04-01 00:00:00

abstract：:A detailed analysis of the periplasmic electron carriers of the photosynthetic bacterium Ectothiorhodospira sp. has been performed. Two low mid-point redox potential electron carriers, cytochrome c' and cytochrome c, are detected. A high potential iron-sulfur protein is the only high mid-point redox potential electron...

journal_title：Photosynthesis research

authors： Buche A,Picorel R,Moulis JM,Verméglio A

更新日期：2000-01-01 00:00:00

abstract：:I provide here a personal perspective on (i) the awards that were given to young investigators at the 2008 and 2009 Gordon Research Conferences on Biochemistry/Biophysics of Photosynthesis; and (ii) the ambiance at these conferences through some photographs, particularly of the 2009 conference. ...

journal_title：Photosynthesis research

authors： Govindjee

更新日期：2009-10-01 00:00:00

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：:The activity of ribulose-1,5-bisphosphate carboxylase/oxygenase fromEuglena gracilis decays steadily when exposed to agents that induce oxidative modification of cysteine residues (Cu(2+), benzofuroxan, disulfides, arsenite, oxidized ascorbate). Inactivation takes place with a concomitant loss of cysteine sulfhydryl g...

journal_title：Photosynthesis research

authors： García-Ferris C,Moreno J

更新日期：1993-01-01 00:00:00

abstract：:Cells of the green alga Dunaliella tertiolecta grown in a light/dark cycle were exposed to high light for about 15 min. In light, energy-dependent quenching reduced fluorescence emission and decreased PS II efficiency. Within 3 minutes after darkening fluorescence quenching largely relaxed. However, PS II fluorescence...

journal_title：Photosynthesis research

authors： Casper-Lindley C,Björkman O

更新日期：1996-12-01 00:00:00

abstract：:The three major chlorophyll-proteins of spinach chloroplasts were solubilized with digitonin and isolated by electrophoresis with deoxycholate. The gel bands were identified from their absorption and fluorescence spectra measured at 77 K. The slowest moving band was a Photosystem I complex (CPI); the second, a Photosy...

journal_title：Photosynthesis research

authors： Brown JS

更新日期：1983-12-01 00:00:00

abstract：:Marine macroalgae possess a range of mechanisms to increase the availability of CO2 for fixation by ribulose-1,5-bisphosphate carboxylase/oxygenase. Of these, possession of a periplasmic or external carbonic anhydrase and the ability to use bicarbonate ions is widely distributed. The mechanisms of carbon acquisition w...

journal_title：Photosynthesis research

authors： Ruiz-Nieto M,Fernández JA,Niell FX,Carmona R

更新日期：2014-09-01 00:00:00

abstract：:The polypeptide composition of thylakoid membranes of the red alga Cyanidium caldarium was studied by PAGE in the presence of lithium dodecyl sulfate. The thylakoid membranes were shown to contain 65 polypeptides with mol wt from 110 to 10 kDa. PS I isolated from C. caldarium cells is composed of at least 5 components...

journal_title：Photosynthesis research

authors： Yurina NP,Karakashev GV,Karapetyan NV,Odintsova MS

更新日期：1991-10-01 00:00:00

abstract：:Pulse modulated fluorescence has increasingly been used as an ecological tool to examine changes in the vertical distribution of microphytobenthic cells within the upper layers of estuarine sediments (most often using the minimum fluorescence yield F(o)) as well as to indicate the health of the community (using the ma...

journal_title：Photosynthesis research

authors： Consalvey M,Jesus B,Perkins RG,Brotas V,Underwood GJ,Paterson DM

更新日期：2004-01-01 00:00:00

abstract：:Glycolate oxidase (GO; EC 1.1.3.1) was purified from the leaves of three plant species:Amaranthus hypochondriacus L.(NAD-ME type C4 dicot),Pisum sativum L. (C3 species) andParthenium hysterophorus L. (C3-C4. intermediate). A flavin moiety was present in the enzyme from all the three species. The enzyme from the C4 pla...

journal_title：Photosynthesis research

authors： Devi MT,Rajagopalan AV,Raghavendara AS

更新日期：1996-03-01 00:00:00

abstract：:Phosphatidylglycerol (PG), containing the unique fatty acid Delta3, trans-16:1-hexadecenoic acid, is a minor but ubiquitous lipid component of thylakoid membranes of chloroplasts and cyanobacteria. We investigated its role in electron transfers and structural organization of Photosystem II (PSII) by treating Arabidops...

journal_title：Photosynthesis research

authors： Kim EH,Razeghifard R,Anderson JM,Chow WS

更新日期：2007-07-01 00:00:00

abstract：:Leaf variegation mutants constitute a unique group of chloroplast development mutants and are ideal genetic materials to dissect the regulation of chloroplast development. We have utilized the Arabidopsis yellow variegated (var2) mutant and genetic suppressor analysis to probe the mechanisms of chloroplast development...

journal_title：Photosynthesis research

authors： Qi Y,Zhao J,An R,Zhang J,Liang S,Shao J,Liu X,An L,Yu F

更新日期：2016-03-01 00:00:00

abstract：:Photosystem I particles containing 30-40 chlorophyll a molecules per primary electron donor P700 were subjected to 1.5 ps low density laser flashes at 610 nm resulting in excitation of the antenna chlorophyll a molecules followed by energy transfer to P700 and subsequent oxidation of P700. Absorbance changes were moni...

journal_title：Photosynthesis research

authors： Wasielewski MR,Fenton JM,Govindjee

更新日期：1987-01-01 00:00:00

abstract：:Humic substances (HSs) can influence the growth and composition of freshwater phytoplankton assemblage. Since HSs contain many phenolic and quinonic moieties and cause growth reductions in eco-physiological field experiments, HSs are considered photosystem II herbicides. To test this specific mode of action in vivo an...

journal_title：Photosynthesis research

authors： Gilbert M,Bährs H,Steinberg CEW,Wilhelm C

更新日期：2018-09-01 00:00:00

abstract：:Biohybrid light-harvesting architectures can be constructed that employ native-like bacterial photosynthetic antenna peptides as a scaffold to which synthetic chromophores are attached to augment overall spectral coverage. Synthetic bacteriochlorins are attractive to enhance capture of solar radiation in the photon-ri...

journal_title：Photosynthesis research

authors： Jiang J,Reddy KR,Pavan MP,Lubian E,Harris MA,Jiao J,Niedzwiedzki DM,Kirmaier C,Parkes-Loach PS,Loach PA,Bocian DF,Holten D,Lindsey JS

更新日期：2014-11-01 00:00:00

abstract：:Modified forms of the D1 protein with deletions in lumen-exposed regions, were constructed in the cyanobacterium Synechocystis 6803 using site-directed mutagenesis. Integration and stability of the mutated D1 proteins in the thylakoid membrane were studied by immunoblot and pulse-chase analyses. It was found that in Δ...

journal_title：Photosynthesis research

authors： Salih G,Wiklund R,Tyystjärvi T,Mäenpää P,Gerez C,Jansson C

更新日期：1996-08-01 00:00:00

abstract：:In vitro studies of the carotenoid peridinin, which is the primary pigment from the peridinin chlorophyll-a protein (PCP) light harvesting complex, showed a strong dependence on the lifetime of the peridinin lowest singlet excited state on solvent polarity. This dependence was attributed to the presence of an intramol...

journal_title：Photosynthesis research

authors： Polívka T,Pascher T,Sundström V,Hiller RG

更新日期：2005-11-01 00:00:00

abstract：:Two portable instruments, designed to evaluate epidermal UV screening in leaves, were compared: the Dualex and the UV-A-PAM fluorimeter. Both instruments excite chlorophyll fluorescence at the same UV wavelengths but reference excitation is in the red and the blue spectral range in the former and the latter fluorimete...

journal_title：Photosynthesis research

authors： Pfündel EE,Ben Ghozlen N,Meyer S,Cerovic ZG

更新日期：2007-07-01 00:00:00

abstract：:We pay tribute to the life and work of Margareta Ryberg (1946-2012). She was an expert on the different forms of protochlorophyll(ide), their protein partners, and their transformations in angiosperms; on the structural aspects, and the nature of prolamellar bodies, as well as on the localization of light-dependent NA...

journal_title：Photosynthesis research

authors： Ryberg H,Björn LO,Skagerfält B,Björn G

更新日期：2012-09-01 00:00:00