Abstract：
:There is diverse, yet controversial fossil evidence for the existence of photosynthesis 3500 million years ago. Among the most persuasive evidence is the stromatolites described from low grade metasedimentary rocks in Western Australia and South Africa. Based on the understanding of the paleobiology of stromatolites and using pertinent fossil and Recent analogs, these Early Archean stromatolites suggest that phototrophs evolved by 3500 million years ago. The evidence allows further interpretation that cyanobacteria were involved. Besides stromatolites, microbial and chemical fossils are also known from the same rock units. Some microfossils morphologically resemble cyanobacteria and thus complement the adduced cyanobacterial involvement in stromatolite construction. If cyanobacteria had evolved by 3500 million years ago, this would indicate that nearly all prokaryotic phyla had already evolved and that prokaryotes diversified rapidly on the early Earth.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Awramik SMdoi
10.1007/BF00039172subject
Has Abstractpub_date
1992-08-01 00:00:00pages
75-89issue
2eissn
0166-8595issn
1573-5079journal_volume
33pub_type
杂志文章abstract：:Chlorosomes, the light-harvesting apparatus of green bacteria, are a unique antenna system, in which pigments are organized in aggregates rather than associated with proteins. Isolated chlorosomes from the green sulphur bacterium Chlorobium tepidum contain 10 surface-exposed proteins. Treatment of chlorosomes from Chl...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-005-3757-4
更新日期：2005-11-01 00:00:00
abstract：:The afterglow (AG) band of thermoluminescence (TL) has been investigated in leaves of Arabidopsis thaliana. Excitation of dark-adapted leaves with two saturating single turn-over flashes induced the appearance of a complex TL glow curve that could be well simulated by three components: the two components, B1 and B2, o...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-7311-6
更新日期：2005-06-01 00:00:00
abstract：:Precise control of the proton concentration gradient across thylakoid membranes (ΔpH) is essential for photosynthesis and its regulation because the gradient contributes to the generation of the proton motive force used for ATP synthesis and also for the fast and reversible induction of non-photochemical quenching (NP...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-018-0575-z
更新日期：2019-03-01 00:00:00
abstract：:Using a novel, pulsed micro-second time-resolved photoacoustic (PA) instrument, we measured thermal dissipation and energy storage (ES) in the intact cells of wild type (WT) Chlamydomonas reinhardtii, and mutants lacking either PSI or PSII reaction centers (RCs). On this time scale, the kinetic contributions of the th...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-011-9682-9
更新日期：2011-09-01 00:00:00
abstract：:Prior to the 1960s, the model for the molecular structure of cell membranes consisted of a lipid bilayer held in place by a thin film of electrostatically-associated protein stretched over the bilayer surface: (the Danielli-Davson-Robertson "unit membrane" model). Andrew Benson, an expert in the lipids of chloroplast ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-007-9159-z
更新日期：2007-05-01 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
pub_type： 杂志文章
doi：10.1007/BF00037001
更新日期：1985-01-01 00:00:00
abstract：:Photoinhibition of Photosystem II (PSII) in lincomycin-treated leaves begins as a first-order reaction, but fluorescence measurements have suggested that after prolonged illumination, the number of active PSII centres stabilizes to 15-20% of control. The stabilization has been interpreted to indicate that photoinhibit...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-009-9496-1
更新日期：2010-01-01 00:00:00
abstract：:A high CO2-requiring mutant of Synechocystis PCC6803 (G3) capable of Ci transport but unable to utilize the intracellular Ci pool for photosynthesis was constructed. A DNA clone of 6.1 kbp that transforms the G3 mutant to the wild-type phenotype was isolated from a Synechocystis PCC6803 genomic library. Complementatio...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00029385
更新日期：1994-02-01 00:00:00
abstract：:In addition to the linear electron transport, several alternative Photosystem I-driven (PS I) electron pathways recycle the electrons to the intersystem electron carriers mediated by either ferredoxin:NADPH reductase, NAD(P)H dehydrogenase, or putative ferredoxin:plastoquinone reductase. The following functions have b...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/B:PRES.0000040442.59311.72
更新日期：2004-01-01 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
pub_type： 杂志文章
doi：10.1007/s11120-015-0195-9
更新日期：2016-03-01 00:00:00
abstract：:Sulfur is one of the critical elements in living matter, as it participates in several structural, metabolic and catalytic activities. Photosynthesis is an important process that entails the use of sulfur during both the light and carbon reactions. Nearly half of global photosynthetic carbon fixation is carried out by...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-005-3250-0
更新日期：2005-12-01 00:00:00
abstract：:A simple approach to determine CO2/O2 specificity factor (τ) of ribulose 1,5-bisphosphate carboxylase/oxygenase is described. The assay measures the amount of CO2 fixation at varying [CO2]/[O2] ratios after complete consumption of ribulose 1,5-bisphosphate (RuBP). Carbon dioxide fixation catalyzed by the carboxylase w...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00029463
更新日期：1995-01-01 00:00:00
abstract：:A computer model comprising light reactions in PS II and PS I, electron-proton transport reactions in mesophyll and bundle sheath chloroplasts, all enzymatic reactions and most of the known regulatory functions of NADP-ME type C(4) photosynthesis has been developed as a system of differential budget equations for inte...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1010695402963
更新日期：2000-01-01 00:00:00
abstract：:We present the wavelength dependence of homogeneous holewidths of persistent spectral holes burnt in O2-evolving Photosystem II core complexes isolated from spinach, in the temperature range 2.5-8 K. The data supports the assignment that those chlorophylls which undergo persistent spectral hole-burning are specific CP...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-7927-6
更新日期：2005-06-01 00:00:00
abstract：:The oxidation kinetics under far-red light (FRL) of photosystem I (PSI) high potential donors P700, plastocyanin (PC), and cytochrome f (Cyt f) were investigated in sunflower leaves with the help of a new high-sensitivity photometer at 810 nm. The slopes of the 810 nm signal were measured immediately before and after ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-007-9224-7
更新日期：2007-10-01 00:00:00
abstract：:Photosynthetic electron transfer has been examined in whole cells, isolated membranes and in partially purified reaction centers (RCs) of Roseicyclus mahoneyensis, strain ML6 and Porphyrobacter meromictius, strain ML31, two species of obligate aerobic anoxygenic phototrophic bacteria. Photochemical activity in strain ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-011-9718-1
更新日期：2012-02-01 00:00:00
abstract：:The dependence on temperature of tryptophan fluorescence lifetime in trimeric photosystem I (PSI) complexes from cyanobacteria Synechocystis sp. PCC 6803 during the heating of pre-frozen to - 180 °C in the dark or in the light-activated preparations has been studied. Fluorescence lifetime in samples frozen in the ligh...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-018-0595-8
更新日期：2019-03-01 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 light response curves of the acceptor and donor side mechanisms of photoinhibition of Photosystem II were calculated, using Arabidopsis as a model organism. Acceptor-side photoinhibition was modelled as double reduction of QA, noting that non-photochemical quenching has the same effect on the quantum yield of QA d...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-7174-x
更新日期：2005-06-01 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：:In this article I review the history of research on the Fenna-Matthews-Olson (FMO) protein with emphasis on my contributions. The FMO protein, which transfers energy from the chlorosome to the reaction center in green sulfur bacteria, was discovered in 1962 and shown to contain bacteriochlorophyll a. From the absorpti...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/B:PRES.0000030428.36950.43
更新日期：2004-01-01 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
pub_type： 杂志文章
doi：10.1007/s11120-009-9479-2
更新日期：2009-10-01 00:00:00
abstract：:Cassava, bean and maize leaves were fed with(14)CO2 in light and the primary products of photosynthesis identified 5 and 10 seconds after assimilation. In maize, approximately three quarters of the labelled carbon was incorporated in C4 acids, in beans about two thirds in PGA, and in cassava approximately 40-60% in C4...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00055123
更新日期：1987-01-01 00:00:00
abstract：:While interest in photosynthetic thermal acclimation has been stimulated by climate warming, comparing results across studies requires consistent terminology. We identify five types of photosynthetic adjustments in warming experiments: photosynthesis as measured at the high growth temperature, the growth temperature, ...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-013-9873-7
更新日期：2014-02-01 00:00:00
abstract：:Oxygenic photosynthesis requires chlorophyll (Chl) for the absorption of light energy, and charge separation in the reaction center of photosystem I and II, to feed electrons into the photosynthetic electron transfer chain. Chl is bound to different Chl-binding proteins assembled in the core complexes of the two photo...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-015-0154-5
更新日期：2015-12-01 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
pub_type： 杂志文章
doi：10.1007/s11120-005-9004-1
更新日期：2006-03-01 00:00:00
abstract：:Chlorosomes of green photosynthetic bacterium Chlorobium tepidum contain aggregates of bacteriochlorophyll c (BChl c) with carotenoids and isoprenoid quinones. BChl aggregates with very similar optical properties can be prepared also in vitro either in non-polar solvents or in aqueous buffers with addition of lipids a...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-007-9259-9
更新日期：2008-02-01 00:00:00
abstract：: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 fo...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-020-00815-x
更新日期：2021-01-11 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
pub_type： 杂志文章,评审
doi：10.1007/s11120-007-9162-4
更新日期：2007-04-01 00:00:00
abstract：:Oxygenic photosynthesis is driven by two multi-subunit membrane protein complexes, Photosystem I and Photosystem II. In plants and green algae, both complexes are composed of two moieties: a reaction center (RC), where light-induced charge translocation occurs, and a peripheral antenna that absorbs light and funnels i...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/B:PRES.0000036881.23512.42
更新日期：2004-01-01 00:00:00
