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 genotype. RuBPCase was also slightly higher. Quantum yield per absorbed light was similar in the two genotypes. P700 and Cyt f were less concentrated in the mutant while PS II was only marginally lower. The light response curve of CO2 assimilation indicated higher level of photosynthesis of the mutant in high light, which corresponded to a lower non-photochemical quenching compared to the wild-type. It is concluded that the reaction centres, cyt f and chlorophyll are not limiting factors of electron transport in wheat seedlings and that electron transport capacity is in excess with respect to that needed for driving photosynthesis. Since the differences in photosynthesis reflect differences in RuBPCase activity, it is suggested that this enzyme limits photosynthesis in wheat seedlings also at high light intensities.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Marco GD,D'Ambrosio N,Giardi MT,Massacci A,Tricoli Ddoi
10.1007/BF00033365subject
Has Abstractpub_date
1989-08-01 00:00:00pages
117-22issue
2eissn
0166-8595issn
1573-5079journal_volume
21pub_type
杂志文章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：:The 'Salada de Chiprana' (Chiprana Lake) is a hypersaline (30-73 per thousand), permanent and shallow lake of endorheic origin in a semi-arid region of the Ebro depression (Aragon, Spain). Magnesium sulfate and sodium chloride represent the main salts of this athalassohaline environment. Anoxic conditions occurred per...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1014915900644
更新日期：2002-01-01 00:00:00
abstract：:The fluorescence kinetics of both intact needles and isolated chloroplasts of summer active and winter stressed Pinus sylvestris were measured at both room temperature and 77 K. It was confirmed that winter stress inhibited the photochemical capacity of photosystem II but also that winter stress caused the strongest i...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00032919
更新日期：1985-01-01 00:00:00
abstract：:The distribution of net photosynthetic activity of leaves was measured in a mixed grass (Setaria sphacelata var. sericea)-legume (Desmodium intortum) pasture stand using a method based on concurrent measurement of the rate of CO2 exchange, and (14)CO2 dosing followed by rapid harvesting according to height strata. Com...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00052375
更新日期：1983-06-01 00:00:00
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：: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：: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
pub_type： 杂志文章
doi：10.1007/BF00034267
更新日期：1981-12-01 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：:A proton electrochemical potential across the membranes of photosynthetic purple bacteria is established by a light-driven proton pump mechanism: the absorbed light in the reaction center initiates electron transfer which is coupled to the vectorial displacement of protons from the cytoplasm to the periplasm. The stoi...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF02185435
更新日期：1993-07-01 00:00:00
abstract：:Several protein-coding genes from land plant chloroplasts have been shown to contain introns. The majority of these introns resemble the fungal mitochondrial group II introns due to considerable nucleotide sequence homology at their 5' and 3' ends and they can readily be folded to form six hairpins characteristic of t...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00039484
更新日期：1988-04-01 00:00:00
abstract：:Analysis of leaf-level photosynthetic responses of 39 tree species grown in elevated concentrations of atmospheric CO2 indicated an average photosynthetic enhancement of 44% when measured at the growth [CO2]. When photosynthesis was measured at a common ambient [CO2], photosynthesis of plants grown at elevated [CO2] w...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00014592
更新日期：1994-03-01 00:00:00
abstract：:Cuttings of grapevine (Vitis vinifera L. cv. Chardonnay) were dark-forced at least three weeks. Pigment contents, 77 K fluorescence emission, excitation spectra of the leaves, petioles, stems, transmission electron micrographs of the etioplasts from leaves, the chlorenchyma tissues of the stems were analysed. The dark...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-004-1061-3
更新日期：2004-01-01 00:00:00
abstract：:A synthetic fluorochromous lipid, rhodaminyl triglyceride (rhodaminyl TG), was intercalated into isolated thylakoid membranes of chloroplasts up to 30 molecules per 100 molecules of chlorophyll. As a result of fluorochrome presence, an absorption band appeared in a yellow-green spectrum region, its intensity being com...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00047079
更新日期：1990-11-01 00:00:00
abstract：:The role of the ferredoxin:thioredoxin system in the reversible light activation of chloroplast enzymes by thiol-disulfide interchange with thioredoxins is now well established. Recent fruitful collaboration between biochemists and structural biologists, reflected by the shared authorship of the paper, allowed to solv...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/B:PRES.0000017194.34167.6d
更新日期：2004-01-01 00:00:00
abstract：:C3 carbon fixation has a bad reputation, primarily because it is associated with photorespiration, a biochemical pathway thought to waste a substantial amount of the carbohydrate produced in a plant. This review presents evidence collected over nearly a century that (1) Rubisco when associated with Mn(2+) generates ad...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-014-0056-y
更新日期：2015-02-01 00:00:00
abstract：:A rapid procedure has been developed for the isolation of the photosystem two reaction centre complex (PS II RC) from a double mutant of Chlamydomonas reinhardtii, F54-14, which lacks the Photosystem one complex and the chloroplast ATPase. Thylakoid membranes are solubilised with 1.5% (w/v) Triton X-100 and the PS II ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00042974
更新日期：1995-02-01 00:00:00
abstract：:Almost 1 year has passed since the death of Wolfgang Haehnel on 13.5.2013, after a long fight against cancer. With his death, the photosynthesis community has lost an excellent scientist, a critical peer, and a stimulating sparring partner in discussions: I also lost a good friend. ...
journal_title：Photosynthesis research
pub_type： 传,历史文章
doi：10.1007/s11120-014-9999-2
更新日期：2014-06-01 00:00:00
abstract：:The photophysical and photochemical reactions, after light absorption by a photosynthetic pigment-protein complex, are among the fastest events in biology, taking place on timescales ranging from tens of femtoseconds to a few nanoseconds. The advent of ultrafast laser systems that produce pulses with femtosecond durat...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-009-9454-y
更新日期：2009-08-01 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
pub_type： 杂志文章
doi：10.1007/s11120-006-9126-0
更新日期：2007-07-01 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
pub_type： 杂志文章
doi：10.1007/BF02184142
更新日期：1994-07-01 00:00:00
abstract：:Most chloroplasts undergo changes in composition, function and structure in response to growth irradiance. However, Tradescantia albiflora, a facultative shade plant, is unable to modulate its light-harvesting components and has the same Chl a/Chl b ratios and number of functional PS II and PS I reaction centres on a ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/A:1010681721929
更新日期：2001-01-01 00:00:00
abstract：:When CO(2) supply is limited, aquatic photosynthetic organisms induce a CO(2)-concentrating mechanism (CCM) and acclimate to the CO(2)-limiting environment. Although the CCM is well studied in unicellular green algae such as Chlamydomonas reinhardtii, physiological aspects of the CCM and its associated genes in multic...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-010-9614-0
更新日期：2011-09-01 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
pub_type： 杂志文章
doi：10.1007/s11120-007-9135-7
更新日期：2007-07-01 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：:The post-translational modification consisting in the formation/reduction of disulfide bonds has been the subject of intense research in plants since the discovery in the 1970s that many chloroplastic enzymes are regulated by light through dithiol-disulfide exchange reactions catalyzed by oxidoreductases called thiore...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-009-9501-8
更新日期：2010-04-01 00:00:00
abstract：:This review describes the progress in our understanding of the structure of the Mn complex in Photosystem II over the last two decades. Emphasis is on the research from our laboratory, especially the results from X-ray absorption spectroscopy, low temperature electron paramagnetic resonance and electron spin echo enve...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00046751
更新日期：1993-01-01 00:00:00
abstract：:Cyanobacteria perform photosynthesis with the use of large light-harvesting antennae called phycobilisomes (PBSs). These hemispherical PBSs contain hundreds of open-chain tetrapyrrole chromophores bound to different peptides, providing an arrangement in which excitation energy is funnelled towards the PBS core from wh...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-017-0417-4
更新日期：2018-03-01 00:00:00
abstract：:For maximal rates of CO2 assimilation in isolated intact spinach chloroplasts the generation of the adequate NADPH/ATP ratio is achieved either by cyclic electron flow around photosystem I or by linear electron transport to oxaloacetate, nitrite or oxygen (Mehler-reaction). The interrelationships between these poising...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00019060
更新日期：1994-10-01 00:00:00
abstract：:The effects of protein phosphorylation and cation depletion on the electron transport rate and fluorescence emission characteristics of photosystem I at two stages of chloroplast development in light-grown wheat leaves are examined. The light-harvesting chlorophyll a/b protein complex associated with photosystem I (LH...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00030071
更新日期：1990-01-01 00:00:00
abstract：:Currently, relatively few proteomics studies of chloroplast have been published, but the field has just started emerging and is likely to develop more rapidly in the future. While the complex membrane structure of the chloroplast makes it difficult to study its entire proteome by global approaches, proteomics has cons...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1023/B:PRES.0000006914.52898.67
更新日期：2003-01-01 00:00:00
