Abstract：
:Detached wheat leaves were illuminated in air until a steady rate of photosynthesis was established. Then the gas was changed to 1% O2, 99% N2 and after 2.5 h further illumination the capacity of the leaves for photosynthesis in air was decreased to approximately 50%. Measurement of RuBP carboxylase activity in extracts showed that inhibition of photosynthesis was accompanied by 70% inactivation of this enzyme. The capacity for photosynthesis and the activity of RuBP carboxylase were recovered when leaves were returned to normal air. Extracts of the leaves made when photosynthesis and carboxylase activity were low, recovered most of the lost carboxylase activity when supplemented with bicarbonate and magnesium ions. The time courses for activation and inactivation of the RuBP carboxylase in these experiments suggests the operation of a mechanism that has not yet been elucidated.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Bovle FA,Keys AJdoi
10.1007/BF00040708subject
Has Abstractpub_date
1982-06-01 00:00:00pages
105-11issue
2eissn
0166-8595issn
1573-5079journal_volume
3pub_type
杂志文章abstract：:Effect of chemical oxidation by ferricyanide on bacteriochlorophyll a (BChl a) in the Fenna-Matthews-Olson protein (FMO) was studied using absorbance and fluorescence spectroscopy at ambient and cryogenic temperatures. Partially selective oxidation of pigments bound to the antenna complex was achieved and the probable...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-013-9878-2
更新日期：2013-09-01 00:00:00
abstract：:The relationship between the redox state of P700, the primary donor of PS I, monitored using absorbance changes at 830 nm and photochemical energy storage in PS I reaction centers assayed with the photoacoustic method (PA) was studied in isolated PS I submembrane particles aspirated onto nitrocellulose filters. Severa...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1021237026500
更新日期：2002-01-01 00:00:00
abstract：:Recently, microalgae have attracted attention as sources of biomass energy. However, fatty acids from the microalgae are mainly unsaturated and show low stability in oxygenated environments, due to oxidation of the double bonds. The branched-chain fatty acid, 10-methyl stearic acid, is synthesized from oleic acid in c...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-018-0537-5
更新日期：2019-03-01 00:00:00
abstract：:A model is presented describing the relationship between chlorophyll fluorescence quenching and photoinhibition of Photosystem (PS) II-dependent electron transport in chloroplasts. The model is based on the hypothesis that excess light creates a population of inhibited PS II units in the thylakoids. Those units are su...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00042009
更新日期：1991-12-01 00:00:00
abstract：:Little is known about the mechanistic basis for the movement of promiscuous nucleic acids across cell membranes. To address this problem we sought conditions that would permit the entry of plasmid DNA into isolated, intact pea chloroplasts. DNA uptake did not occur normally, but was induced by hypotonic treatments, by...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00020448
更新日期：1995-11-01 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
pub_type： 杂志文章
doi：10.1007/BF00019150
更新日期：1987-01-01 00:00:00
abstract：:This concise review describes the current status of research into how carotenoids function in bacterial photosynthesis. This is illustrated by reference to very recent studies on both the photoprotective and antenna functions of carotenoids. The major remaining open questions on the detailed molecular mechanisms invol...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1014715114520
更新日期：2001-01-01 00:00:00
abstract：:Triplet state electron paramagnetic resonance (EPR) experiments have been carried out at X-band on Rb. sphaeroides R-26 reaction centers that have been reconstituted with the carotenoid, spheroidene, and exchanged with 13(2)-OH-Zn-bacteriochlorophyll a and [3-vinyl]-13(2)-OH-bacteriochlorophyll a at the monomeric, 'ac...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00032823
更新日期：1993-09-01 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
pub_type： 杂志文章
doi：10.1007/s11120-014-9978-7
更新日期：2014-06-01 00:00:00
abstract：:The chloroplast ATP synthase synthesizes ATP from ADP and free phosphate coupled by the electrochemical potential across the thylakoid membrane in the light. The light-dependent regulation of ATP synthase activity is carried out in part through redox modulation of a cysteine disulfide bridge in CF1 gamma-subunit. In o...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-008-9315-0
更新日期：2008-08-01 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
pub_type： 杂志文章
doi：10.1007/s11120-011-9712-7
更新日期：2012-02-01 00:00:00
abstract：:Light energy harvested by the pigments in Photosystem I (PSI) is used for charge separation in the reaction center (RC), after which the positive charge resides on a special chlorophyll dimer called P700. In studies on the PSI trapping kinetics, P700(+) is usually chemically reduced to re-open the RCs. So far, the inf...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-011-9671-z
更新日期：2012-03-01 00:00:00
abstract：:The genome of the purple non-sulphur photosynthetic bacterium Rhodopseudomonas acidophila has been found to contain multiple copies of puc light-harvesting (LH2) peripheral antenna complex genes. Three wild-type isolates each exhibiting dissimilar peripheral antenna complex phenotypes in response to growth at reduced ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00034783
更新日期：1996-09-01 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
pub_type： 杂志文章
doi：10.1007/s11120-009-9479-2
更新日期：2009-10-01 00:00:00
abstract：:The previous work in our lab showed that the spinach chloroplast ATP synthase epsilon mutant with 3 amino acid residues deleted from the N-terminus had much lower ability to inhibit ATP hydrolysis and block proton leakage in comparison to a mutant with 1 or 2 residues deleted from the N-terminus. The present study aim...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-6554-6
更新日期：2005-01-01 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
pub_type： 杂志文章,评审
doi：10.1007/s11120-012-9761-6
更新日期：2012-09-01 00:00:00
abstract：:We investigated several photosynthetic parameters of a virescent mutant of durum wheat and of its wild-type. Electron transport rate to ferricyanide was the same in the two genotypes when expressed on leaf area basis while O2 evolution of the leaf tissue in saturating light and CO2 was slightly higher in the yellow ge...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00033365
更新日期：1989-08-01 00:00:00
abstract：:The study of the light-harvesting complex II (LHC-II) phosphatase activity has been difficult due to the membrane association of its substrate. Thylakoid membranes labeled with [γ-(32)P]ATP were incubated with chymotrypsin, releasing phosphopeptides which served as labeled substrates for LHC-II phosphatase. Utilizing ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00018301
更新日期：1995-05-01 00:00:00
abstract：:A study of the absorption and fluorescence characteristics of the D1/D2/cytb-559 reaction centre complex of Photosystem II has been carried out by gaussian decomposition of absorption spectra both at room temperature and 72 K and of the room temperature fluorescence spectrum. A five component fit was found in which th...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF02183048
更新日期：1994-09-01 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
pub_type： 杂志文章
doi：10.1007/BF00037179
更新日期：1989-09-01 00:00:00
abstract：:The Fabaceae tree Butea monosperma (TAUB.; syn. Erythrina monosperma (LAM.)) is widely distributed in Central and West-India. We studied it at three sites, i.e. at two locations with contrasting exposure (NE and SW, respectively) in a small mountain range with poor soil on highly drained rocky slopes and at a third lo...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-012-9770-5
更新日期：2012-09-01 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
pub_type： 杂志文章
doi：10.1023/B:PRES.0000028397.86495.b5
更新日期：2004-01-01 00:00:00
abstract：:Lipids are important components of transmembrane protein complexes. In order to study the roles of lipids in photosystem II (PSII), we treated the PSII core dimer complex from a thermophilic cyanobacterium Thermosynechococcus vulcanus with phospholipase A(2) (PLA(2)) and lipase, and examined their effects on PSII stru...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-008-9335-9
更新日期：2008-10-01 00:00:00
abstract：:Phycobilisomes (PBS) are antenna complexes that harvest light for photosystem (PS) I and PS II in cyanobacteria and some algae. A process known as far-red light photoacclimation (FaRLiP) occurs when some cyanobacteria are grown in far-red light (FRL). They synthesize chlorophylls d and f and remodel PS I, PS II, and P...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-016-0303-5
更新日期：2017-02-01 00:00:00
abstract：:The quantum yield for light-induced H2 generation was measured for a previously optimized bio-hybrid cytochrome c 6-crosslinked PSI(C13G)-1,8-octanedithiol-[FeFe]-H2ase(C97G) (PSI-H2ase) nanoconstruct. The theoretical quantum yield for the PSI-H2ase nanoconstruct is 0.50 molecules of H2 per photon absorbed, which equa...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-014-0064-y
更新日期：2016-01-01 00:00:00
abstract：:Carbohydrate feedstocks are at the root of bioindustrial production and are needed in greater quantities than ever due to increased prioritization of renewable fuels with reduced carbon footprints. Cyanobacteria possess a number of features that make them well suited as an alternative feedstock crop in comparison to t...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-014-9980-0
更新日期：2015-03-01 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
pub_type： 杂志文章
doi：10.1007/BF00030048
更新日期：1982-01-01 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
pub_type： 杂志文章
doi：10.1007/s11120-018-0508-x
更新日期：2018-09-01 00:00:00
abstract：:The dependence of chlorosome development on bacteriochlorophyll (BChl)c synthesis was studied with the phototrophic green bacteriumChloroflexus aurantiacus. By selecting defined culture conditions, three possibilities could be identified. Upon addition of 5-aminolevulinic acid, cells of resting cultures increased thei...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF02184154
更新日期：1994-07-01 00:00:00
abstract：:Light activation of phosphoenolpyruvate carboxylase from the leaves of the C4 plant Setaria verticillata (L.) is more pronounced at low CO2 levels. The 2-fold activation observed at physiological ambient CO2 becomes 3.64-fold at 5 μL/L and completely abolished above 700 μL/L. When the stomata close under the influence...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00034834
更新日期：1988-11-01 00:00:00
