Abstract：
:Moderate heat stress and fluctuating light are typical conditions in summer in tropical and subtropical regions. This type of stress can cause photodamage to photosystems I and II (PSI and PSII). However, photosynthetic responses to the combination of heat and fluctuating light in young leaves are little known. In this study, we investigated chlorophyll fluorescence and P700 redox state under fluctuating light at 25 °C and 42 °C in young leaves of tobacco. Our results indicated that fluctuating light caused selective photodamage to PSI in the young leaves at 25 °C and 42 °C. Furthermore, the moderate heat stress significantly accelerated photoinhibition of PSI under fluctuating light. Within the first 10 s after transition from low to high light, cyclic electron flow (CEF) around PSI was highly stimulated at 25 °C but was slightly activated at 42 °C. Such depression of CEF activation at moderate heat stress were unable to maintain energy balance under high light. As a result, electron flow from PSI to NADP+ was restricted, leading to the over-reduction of PSI electron carriers. These results indicated that moderate heat stress altered the CEF performance under fluctuating light and thus accelerated PSI photoinhibition in tobacco young leaves.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Tan SL,Yang YJ,Huang Wdoi
10.1007/s11120-020-00754-7subject
Has Abstractpub_date
2020-06-01 00:00:00pages
373-382issue
3eissn
0166-8595issn
1573-5079pii
10.1007/s11120-020-00754-7journal_volume
144pub_type
杂志文章abstract：:The photosystem II (PSII) manganese-stabilizing protein (PsbO) is known to be the essential PSII extrinsic subunit for stabilization and retention of the Mn and Cl(-) cofactors in the oxygen evolving complex (OEC) of PSII, but its function relative to Ca(2+) is less clear. To obtain a better insight into the relations...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-011-9703-8
更新日期：2011-12-01 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
pub_type： 杂志文章
doi：10.1007/BF00035678
更新日期：1991-10-01 00:00:00
abstract：:Chlorophyll (Chl) b serves an essential function in accumulation of light-harvesting complexes (LHCs) in plants. In this article, this role of Chl b is explored by considering the properties of Chls and the ligands with which they interact in the complexes. The overall properties of the Chls, not only their spectral f...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-007-9181-1
更新日期：2007-11-01 00:00:00
abstract：:The seasonal maximum in photosynthetic CO2 exchange rate (CER) and the cessation of leaf expansion in soybeans (Glycine max (L.) Merr) accompany fruiting under normal agricultural conditions. To investigate whether these phenomena were obligatively tied together, we caused early flowering of long-season varieties by i...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00034108
更新日期：1982-12-01 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 storage of light energy in chemical form through photosynthesis is the key process underlying life as we know it. To utilize photosynthates efficiently as structural materials or as fuel to drive endergonic processes, they have to be transported from where they are produced to where they are needed. In this primer...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-013-9867-5
更新日期：2013-11-01 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：:The possible origins of the different fluorescence decay components in green plants are discussed in terms of a random walk and Butler's bipartite model. The interaction of the excitations with the photosystem II reaction centers and, specifically, the regeneration of theses excitations by charge recombination within ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00118288
更新日期：1986-01-01 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
pub_type： 杂志文章
doi：10.1023/A:1006445810996
更新日期：2000-01-01 00:00:00
abstract：:The Photosystem I reaction centre protein CP1, isolated from barley using polyacrylamide gel electrophoresis showed an EPR (Electron Paramgnetic Resonance) spectrum with the polarisation pattern AEEAAE, typical of the primary donor triplet state (3)P700, created via radical pair formation and recombination. (3)P700 co...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00034795
更新日期：1992-06-01 00:00:00
abstract：:In this report we demonstrate sulfite interaction with oxygen and PSII electron acceptors (ferricyanide and para-benzoquinone) during measurement of oxygen evolution in chloroplasts. Redox potentials of oxygen, ferricyanide and para-benzoquinone allow them to compete for sulfite. Without taking this into account, sulf...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00019595
更新日期：1987-01-01 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：:Upon high light excitation in photosynthetic bacteria, various triplet states of pigments can accumulate leading to harmful effects. Here, the generation and lifetime of flash-induced carotenoid triplets (3Car) have been studied by observation of the quenching of bacteriochlorophyll (BChl) fluorescence in different st...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-017-0434-3
更新日期：2018-04-01 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 oxygen flash yield (YO2) and photochemical yield of PS II (ΦPS II) were simultaneously detected in intact Chlorella cells on a bare platinum oxygen rate electrode. The two yields were measured as a function of background irradiance in the steady-state and following a transition from light to darkness. During stead...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00029472
更新日期：1996-06-01 00:00:00
abstract：:The linear dichroism of Photosystem I particles containing 10 chlorophylls per P700 has been investigated at 10 K. The particles were oriented by uniaxial squeezing of polyacrylamide gels. The oxidation state of P700 was altered either by incubation of the gels with redox mediators or by low temperature illumination. ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00047172
更新日期：1989-07-01 00:00:00
abstract：:Flash-induced absorbance measurements at 830 nm on both nanosecond and microsecond timescales have been used to characterise the effect of ultraviolet light on Photosystem II core particles. A combination of UV-A and UV-B, closely simulating the spectrum of sunlight below 350 nm, was found to have a primary effect on ...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00029424
更新日期：1996-07-01 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：:We have constructed a mutant Synechococcus sp. PCC 7942, termed R2HECAT, in which the entire phycobilisome rod operon has been deleted. In the whole cell absorption spectra of R2HECAT, the peak corresponding to phycocyanin (PC), λmax≈620 nm, could not be detected. However, a single pigment-protein fraction with λmax=6...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00032236
更新日期：1995-07-01 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：:In appreciation of his contribution to the Photosystsem II research and commemoration of the book Photosystem II: The Light-Driven Water-Plastoquinone Oxido-Reductase, co-edited with Kimiyuki Satoh, I present here some of my recollections of Thomas John Wydrzynski and by several others with whom he has associated over...
journal_title：Photosynthesis research
pub_type： 传,历史文章,杂志文章
doi：10.1007/s11120-008-9341-y
更新日期：2008-10-01 00:00:00
abstract：:Biological water oxidation, performed by a single enzyme, photosystem II, is a central research topic not only in understanding the photosynthetic apparatus but also for the development of water splitting catalysts for technological applications. Great progress has been made in this endeavor following the report of a ...
journal_title：Photosynthesis research
pub_type： 杂志文章,评审
doi：10.1007/s11120-019-00648-3
更新日期：2019-10-01 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：: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：:We evaluate low-temperature (low-T) emission spectra of photosystem II core complexes (PSII-cc) previously reported in the literature, which are compared with emission spectra of PSII-cc obtained in this work from spinach and for dissolved PSII crystals from Thermosynechococcus (T.) elongatus. This new spectral datase...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/s11120-015-0128-7
更新日期：2015-06-01 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
pub_type： 杂志文章
doi：10.1023/A:1020475502933
更新日期：2002-01-01 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：: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 light-harvesting complex (LHC) of higher plants isolated using Triton X-100 has been studied during its transformation into a monomeric form known as CPII. The change was accomplished by gradually increasing the concentration of the detergent, sodium dodecyl sulfate (SDS). Changes in the red spectral region of the...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00029727
更新日期：1986-01-01 00:00:00
abstract：:Structural analogues of the NADP(+) were studied as potential coenzymes and inhibitors for NADP(+) dependent malic enzyme from Zea mays L. leaves. Results showed that 1, N(6)-etheno-nicotinamide adenine dinucleotide phosphate (∈ NADP(+)), 3-acetylpyridine-adenine dinucleotide phosphate (APADP(+)), nicotinamide-hypoxan...
journal_title：Photosynthesis research
pub_type： 杂志文章
doi：10.1007/BF00033716
更新日期：1991-05-01 00:00:00
