Photosynthetica最新文献_第4页

Influence of reduced amounts of sulfoquinovosyl diacylglycerol on the thylakoid membranes of the diatom Thalassiosira pseudonana. 磺基异丙醇二酰基甘油的减量对假海硅藻类囊体膜的影响

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-09-05 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.032

T Liebisch, M Başoglu, S Jäger, C Büchel

引用次数: 0

Single-cell microfluidics in combination with chlorophyll a fluorescence measurements to assess the lifetime of the Chlamydomonas PSBO protein. 单细胞微流体结合叶绿素a荧光测量评估衣藻PSBO蛋白的寿命

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-07-31 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.028

E Széles, S Kuntam, A Vidal-Meireles, V Nagy, K Nagy, Á ÁBrahám, L Kovács, S Z Tóth

{"title":"Single-cell microfluidics in combination with chlorophyll a fluorescence measurements to assess the lifetime of the Chlamydomonas PSBO protein.","authors":"E Széles, S Kuntam, A Vidal-Meireles, V Nagy, K Nagy, Á ÁBrahám, L Kovács, S Z Tóth","doi":"10.32615/ps.2023.028","DOIUrl":"10.32615/ps.2023.028","url":null,"abstract":"PSBO is an essential subunit of the oxygen-evolving complex and we recently demonstrated that its lifetime depends on environmental conditions in Chlamydomonas reinhardtii. To assess PSBO lifetime with a high time resolution, we employed (1) a microfluidic platform enabling the trapping of single cells and the parallel measurement of photosynthetic activity, and (2) a nitrate-inducible PSBO amiRNA line. Our microfluidic platform allowed the rapid replacement of the nutrient solution necessary for induction. It also enabled the precise monitoring of the decline in the Fv/Fm value, reflecting PSBO loss. We found that in the dark, at medium and high light intensity, the Fv/Fm value decreased with halftimes of about 25, 12.5, and 5 h, respectively. We also observed that photosynthetic activity was better sustained upon carbon limitation. In the absence of acetate, the halftimes of Fv/Fm diminishment doubled to quadrupled compared with the control, acetate-supplied cultures.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"32 1","pages":"417-424"},"PeriodicalIF":2.1,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11586836/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76537549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LHCII - a protein like a 'Swiss Army knife' with many mechanisms and functions. LHCII -一种像“瑞士军刀”一样的蛋白质，具有许多机制和功能

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-07-13 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.025

E Janik-Zabrotowicz, W I Gruszecki

{"title":"LHCII - a protein like a 'Swiss Army knife' with many mechanisms and functions.","authors":"E Janik-Zabrotowicz, W I Gruszecki","doi":"10.32615/ps.2023.025","DOIUrl":"10.32615/ps.2023.025","url":null,"abstract":"The review highlights the relationship between the molecular organization of the light-harvesting complex of photosystem II (LHCII) and sunlight utilization by higher plants. The molecular form of LHCII switches rapidly and reversibly during diurnal changes of light intensity, from low (ca. 10) to high [ca. 1,000 μmol(photon) m-2 s-1], so the sensitivity of LHCII to light may control the balance between light harvesting and photoprotection state. Our understanding and concept of this mechanism are based on the knowledge of the structure and photophysics of different LHCII molecular forms: monomer, dimer, trimer, and aggregate. It is proposed that LHCII monomers, dimers, and lateral aggregates are fundamental blocks of excess light-dissipation machinery. Trimer is exceptionally well suited to play a physiological role of an antenna complex. A correlation between the LHCII molecular form and the presence of xanthophyll cycle pigment violaxanthin and zeaxanthin in the complex structure is also shown. Moreover, the role of LHCII protein phosphorylation in thylakoid membrane architecture is also discussed. The dual function of LHCII has been studied in the natural thylakoid membranes of chloroplasts, in the artificial lipid-LHCII model membranes, and by suspension of LHCII in a detergent solution.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"92 1","pages":"405-416"},"PeriodicalIF":2.1,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11586845/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90871997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of salt stress on physiology, leaf mass, and nutrient accumulation in romaine lettuce. 盐胁迫对长叶莴苣生理、叶质量和养分积累的影响

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-07-11 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.027

B Adhikari, O J Olorunwa, S Brazel, T C Barickman, R Bheemanahalli

{"title":"Impact of salt stress on physiology, leaf mass, and nutrient accumulation in romaine lettuce.","authors":"B Adhikari, O J Olorunwa, S Brazel, T C Barickman, R Bheemanahalli","doi":"10.32615/ps.2023.027","DOIUrl":"10.32615/ps.2023.027","url":null,"abstract":"The impact of salt stress is becoming more prevalent each year, largely due to the effects of climate change. Limited availability of salt-free water is rising concern for hydroponics lettuce production. Despite evidence supporting salt stress-induced quality losses and physiological changes, studies on romaine lettuce salt-stress tolerance are limited. This study examined the mechanism underlying the sodium chloride (NaCl) tolerance (0, 50, 100, and 150 mM) of lettuce on its growth and nutrition at late-rosette and early head-formation stages. Results revealed 76% fresh mass reduction under increased NaCl at both stages. The study also found unchanged carbon assimilation with reduced stomatal conductance under increased NaCl. Salt-stressed lettuce accumulated more boron and iron but had reduced phosphorus and calcium. Phenolics and sugars increased linearly under salt stress, suggesting that lettuce responds to increased oxidative stress at both stages. A positive association between salt treatment and sodium to potassium ion ratio indicated lettuce sensitivity to salt stress at both stages.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"21 4","pages":"342-353"},"PeriodicalIF":2.1,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11558591/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72409751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Can seedlings of Norway spruce (Picea abies L. H. Karst.) populations withstand changed climate conditions? 挪威云杉(Picea abies l.h. Karst.)种群的幼苗能否承受气候条件的变化?

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-07-11 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.026

H Húdoková, P Fleischer, M Ježík, J Marešová, E Pšidová, M Mukarram, Ľ Ditmarová, A Sliacka-KonôPková, G Jamnická

{"title":"Can seedlings of Norway spruce (Picea abies L. H. Karst.) populations withstand changed climate conditions?","authors":"H Húdoková, P Fleischer, M Ježík, J Marešová, E Pšidová, M Mukarram, Ľ Ditmarová, A Sliacka-KonôPková, G Jamnická","doi":"10.32615/ps.2023.026","DOIUrl":"10.32615/ps.2023.026","url":null,"abstract":"A manipulative experiment with two different water regimes was established to identify the variability of physiological responses to environmental changes in 5-year-old Norway spruce provenances in the Western Carpathians. While variations in the growth responses were detected only between treatments, photosynthetic and biochemical parameters were also differently influenced among provenances. Following drought treatment, an obvious shrinkage of tree stems was observed. In most provenances, drought had a negative effect on leaf gas-exchange parameters and kinetics of chlorophyll a fluorescence. Secondary metabolism was not affected so much with notable differences in concentration of sabinene, o-cimene, and (-)-alpha-terpineol monoterpenes. The most suitable indicators of drought stress were abscisic acid and fluorescence parameters. Seedlings from the highest altitude (1,500 m a.s.l.) responded better to stress conditions than the other populations. Such provenance trials may be a valuable tool in assessing the adaptive potential of spruce populations under changing climate.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"101 1","pages":"328-341"},"PeriodicalIF":2.1,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11558570/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72422544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of nitrogen and phosphorus additions on parameters of photosynthesis and chlorophyll fluorescence in Cyclocarya paliurus seedlings. 氮磷添加量对绿萝幼苗光合和叶绿素荧光参数的影响

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-06-19 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.023

X L Yue, X F Liu, S Z Fang

{"title":"Influence of nitrogen and phosphorus additions on parameters of photosynthesis and chlorophyll fluorescence in Cyclocarya paliurus seedlings.","authors":"X L Yue, X F Liu, S Z Fang","doi":"10.32615/ps.2023.023","DOIUrl":"10.32615/ps.2023.023","url":null,"abstract":"Cyclocarya paliurus has been traditionally used as a functional food in China. A hydroponic experiment was conducted to determine the effects of N and P additions on photosynthesis and chlorophyll fluorescence (ChlF) of C. paliurus seedlings. N and P additions significantly altered photosynthesis and ChlF in the seedlings, but responses of these parameters to the N and P concentrations varied at different developmental stages. The greatest net photosynthetic rate (P N) and actual photochemical efficiency of PSII (ФPSII) occurred in the treatment of 150.0 mg(N) L-1 and 25.0 mg(P) L-1 addition, whereas the highest maximum quantum yield of PSII (Fv/Fm) and water-use efficiency (WUE) were recorded with 150.0 mg(N) L-1 and 15.0 mg(P) L-1 on the 60th day after treatment. Significantly positive correlations of P N with leaf relative chlorophyll content, transpiration rate, WUE, Fv/Fm, and ΦPSII, as well as the ФPSII with the Fv/Fm, were found. Our results indicated that an optimal addition of N and P nutrients depends on their coupling effects on the photosynthetic capacity and PSII photochemistry.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"31 1","pages":"318-327"},"PeriodicalIF":2.1,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11558584/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82873587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial.

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-06-06 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.024

M Landi, M Brestic, S Kataria, S I Allakhverdiev

引用次数: 0

Photosystems under high light stress: throwing light on mechanism and adaptation 强光胁迫下的光系统:机制和适应

4区生物学

Photosynthetica Pub Date : 2023-06-06 DOI: 10.32615/ps.2023.021

N. SHARMA, S. NAGAR, M. THAKUR, P. SURIYAKUMAR, S. KATARIA, A.K. SHANKER, M. LANDI, A. ANAND

{"title":"Photosystems under high light stress: throwing light on mechanism and adaptation","authors":"N. SHARMA, S. NAGAR, M. THAKUR, P. SURIYAKUMAR, S. KATARIA, A.K. SHANKER, M. LANDI, A. ANAND","doi":"10.32615/ps.2023.021","DOIUrl":"https://doi.org/10.32615/ps.2023.021","url":null,"abstract":"High light stress decreases the photosynthetic rate in plants due to photooxidative damage to photosynthetic apparatus, photoinhibition of PSII, and/or damage to PSI. The dissipation of excess energy by nonphotochemical quenching and degradation of the D1 protein of PSII and its repair cycle help against photooxidative damage. Light stress also activates stress-responsive nuclear genes through the accumulation of phosphonucleotide-3'-phosphoadenosine- 5'-phosphate, methylerythritol cyclodiphosphate, and reactive oxygen species which comprise the chloroplast retrograde signaling pathway. Additionally, hormones, such as abscisic acid, cytokinin, brassinosteroids, and gibberellins, play a role in acclimation to light fluctuations. Several alternate electron flow mechanisms, which offset the excess of electrons, include activation of plastid or plastoquinol terminal oxidase, cytochrome b6/f complex, cyclic electron flow through PSI, Mehler ascorbate peroxidase pathway or water-water cycle, mitochondrial alternative oxidase pathway, and photorespiration. In this review, we provided insights into high light stress-mediated damage to photosynthetic apparatus and strategies to mitigate the damage by decreasing antennae size, enhancing NPQ through the introduction of mutants, expression of algal proteins to improve photosynthetic rates and engineering ATP synthase.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135493334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Strong increase of photosynthetic pigments and leaf size in a pruned Ginkgo biloba tree. 修剪后的银杏叶片的光合色素和叶片大小明显增加

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-06-01 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.020

H K Lichtenthaler, E Abuslima, P Nick

{"title":"Strong increase of photosynthetic pigments and leaf size in a pruned Ginkgo biloba tree.","authors":"H K Lichtenthaler, E Abuslima, P Nick","doi":"10.32615/ps.2023.020","DOIUrl":"10.32615/ps.2023.020","url":null,"abstract":"A 50-year-old solitary, sun-exposed ginkgo tree had strongly been pruned in the fall of 2021. Very few buds for the formation of new leaves, twigs, and branches were left over. In spring 2022, these few remaining buds responded with the formation of a different leaf type. These leaves were 2.7 times larger and also thicker than in the years before. In addition, the mean content of total chlorophylls [Chl (a+b)] per leaf area unit of dark-green leaves was 1.45, those of green leaves two times higher as compared to the years before pruning and the two other ginkgo trees which had been investigated in parallel. A comparable increase was also found for the level of total carotenoids (x+c). The mean content for Chl (a+b) were 1,118 mg m-2 for dark-green and 898 mg m-2 for green leaves as compared to 435 to 770 mg m-2 in leaves of other trees. The higher values for Chl (a+b) and total carotenoid content showed up also on a fresh and dry mass basis. Thus, with the formation of a new, larger leaf type by changes in morphology (leaf size and thickness) and the increase of photosynthetic pigments, the pruned ginkgo tree was able to compensate for the much lower number of leaves and photosynthetic units.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"12 1","pages":"297-307"},"PeriodicalIF":2.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11558581/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85824831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the relationship between color-tuning of photosynthetic excitons and thermodynamic stability of light-harvesting chromoproteins. 光合激子的调色与光收集色蛋白热力学稳定性关系的评价

IF 2.1 4区生物学

Photosynthetica Pub Date : 2023-06-01 eCollection Date: 2023-01-01 DOI: 10.32615/ps.2023.022

M Rätsep, A Lehtmets, L Kangur, K Timpmann, K Leiger, Z-Y Wang-Otomo, A Freiberg

{"title":"Evaluation of the relationship between color-tuning of photosynthetic excitons and thermodynamic stability of light-harvesting chromoproteins.","authors":"M Rätsep, A Lehtmets, L Kangur, K Timpmann, K Leiger, Z-Y Wang-Otomo, A Freiberg","doi":"10.32615/ps.2023.022","DOIUrl":"10.32615/ps.2023.022","url":null,"abstract":"Color-tuning is a critical survival mechanism for photosynthetic organisms. Calcium ions are believed to enhance both spectral tuning and thermostability in obligatory calcium-containing sulfur purple bacteria. This study examined the thermo- and piezo stability of the LH1-RC complexes from two calcium-containing sulfur purple bacteria notable for their extreme red-shifted spectra. The results generally show limited reversibility of both temperature and pressure effects related to the malleability of calcium-binding sites. While the pressure-induced decomposition product closely resembles the calcium-depleted form of the chromoproteins, the thermally induced products reveal monomeric B777 and dimeric B820 forms of bacteriochlorophyll a, similar to those seen in non-sulfur purple bacteria treated with detergent. The study further found nearly unison melting of the protein tertiary and secondary structures. Overall, our findings do not support a direct link between color adjustment and thermodynamic stability in light-harvesting chromoproteins.","PeriodicalId":20157,"journal":{"name":"Photosynthetica","volume":"29 1","pages":"308-317"},"PeriodicalIF":2.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11558578/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78147141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0