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1. Effect street light pollution on the photosynthetic efficiency of different plants

Author:
Meravi, Neelima; Kumar Prajapati, Santosh
Source:
Biological rhythm research 2020 v.51 no.1 pp. 67-75
ISSN:
1744-4179
Subject:
photosystem II,   etc   ; chlorophyll; photochemistry; pollution;     Show all 4 Subjects
Abstract:
... The present study was conducted to study the effect of light pollution on the photosynthetic efficiency of plants growing near to street light. The photosynthetic parameters Fv/Fm (Fm - Fo/Fm); maximum photochemical quantum yield of PS II (photosystem II), Y II (photochemical quantum yield of photosystem II), Y (NPQ), Y (NO) were recorded with the help of JUNIOR‐PAM, Chlorophyll Fluorometer, Heinz ...
DOI:
10.1080/09291016.2018.1518206

2. What can we still learn from the electrochromic band-shifts in Photosystem II?

Author:
Boussac, Alain; Sellés, Julien; Sugiura, Miwa
Source:
Biochimica et biophysica acta 2020 v.1861 no.5-6 pp. 148176
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; electron transfer; hydrogen bonding; models; mutants; oxidation; pH;     Show all 7 Subjects
Abstract:
... Electrochromic band-shifts have been investigated in Photosystem II (PSII) from Thermosynechoccocus elongatus. Firstly, by using Mn-depleted PsbA1-PSII and PsbA3-PSII in which the QX absorption of PheD₁ differs, a band-shift in the QX region of PheD₂ centered at ~ 544 nm has been identified upon the oxidation, at pH 8.6, of TyrD. In contrast, a band-shift due to the formation of either QA•⁻ or Tyr ...
DOI:
10.1016/j.bbabio.2020.148176

3. Physiology of soybean as affected by PEG-induced drought stress

Author:
Basal, Oqba; Szabó, András; Veres, Szilvia
Source:
Current plant biology 2020 v.22 pp. 100135
ISSN:
2214-6628
Subject:
photosystem II,   etc   ; chlorophyll; cultivars; flowering; photochemistry; polyethylene glycol; soybeans; stomatal conductance; water stress; yield components; Hungary;     Show all 11 Subjects
Abstract:
... To evaluate the influence of drought stress on soybean physiology, a controlled-environment experiment was conducted at the Institute of Plant Sciences, University of Debrecen, Hungary. Two soybean cultivars, ES Mentor and Pedro, were subjected to four different levels of water deficiency elaborated by different polyethylene glycol (PEG) concentrations; 2.5, 5, 7.5 and 10 % starting from the post- ...
DOI:
10.1016/j.cpb.2020.100135

4. Temporal variation in chlorophyll fluorescence of different tree species

Author:
Meravi, Neelima; Prajapati, Santosh Kumar
Source:
Biological rhythm research 2020 v.51 no.3 pp. 331-337
ISSN:
1744-4179
Subject:
photosystem II,   etc   ; Madhuca longifolia; Ricinus communis; Terminalia arjuna; chlorophyll; clearcutting; fluorescence; leaves; photochemistry; temporal variation; trees;     Show all 11 Subjects
Abstract:
... In the present work, an attempt has been made to observe the temporal variation in leaf chlorophyll fluorescence of different tree species (Madhuca longifolia, Ricinus communis and Terminalia arjuna). Leaf chlorophyll fluorescence parameters viz. Fv/Fm = Fm−Fo/Fm (maximum photochemical quantum yield of photosystem II), Y (II) = F’m−F’/F’m (photochemical quantum yield of photosystem II) and qL = qₚ ...
DOI:
10.1080/09291016.2018.1528694

5. The BF4 and p71 antenna mutants from Chlamydomonas reinhardtii

Author:
Bujaldon, Sandrine; Kodama, Natsumi; Rathod, Mithun Kumar; Tourasse, Nicolas; Ozawa, Shin-Ichiro; Sellés, Julien; Vallon, Olivier; Takahashi, Yuichiro; Wollman, Francis-André
Source:
Biochimica et biophysica acta 2020 v.1861 no.4 pp. 148085
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; Chlamydomonas reinhardtii; biogenesis; genes; light harvesting complex; mutants; mutation; nuclear genome; phenotype; photosystem I;     Show all 10 Subjects
Abstract:
... Two pale green mutants of the green alga Chlamydomonas reinhardtii, which have been used over the years in many photosynthesis studies, the BF4 and p71 mutants, were characterized and their mutated gene identified in the nuclear genome. The BF4 mutant is defective in the insertase Alb3.1 whereas p71 is defective in cpSRP43. The two mutants showed strikingly similar deficiencies in most of the peri ...
DOI:
10.1016/j.bbabio.2019.148085

6. Tuning antenna function through hydrogen bonds to chlorophyll a

Author:
Llansola-Portoles, Manuel J.; Li, Fei; Xu, Pengqi; Streckaite, Simona; Ilioaia, Cristian; Yang, Chunhong; Gall, Andrew; Pascal, Andrew A.; Croce, Roberta; Robert, Bruno
Source:
Biochimica et biophysica acta 2020 v.1861 no.4 pp. 148078
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; Raman spectroscopy; absorption; chlorophyll; energy transfer; functional properties; hydrogen bonding; light harvesting complex; moieties;     Show all 9 Subjects
Abstract:
... We describe a molecular mechanism tuning the functional properties of chlorophyll a (Chl-a) molecules in photosynthetic antenna proteins. Light-harvesting complexes from photosystem II in higher plants – specifically LHCII purified with α- or β-dodecyl-maltoside, along with CP29 – were probed by low-temperature absorption and resonance Raman spectroscopies. We show that hydrogen bonding to the con ...
DOI:
10.1016/j.bbabio.2019.148078

7. Energy conversion processes and related gene expression in a sunflower mutant with altered salicylic acid metabolism

Author:
Scartazza, Andrea; Fambrini, Marco; Mariotti, Lorenzo; Picciarelli, Piero; Pugliesi, Claudio
Source:
Plant physiology and biochemistry 2020 v.148 pp. 122-132
ISSN:
0981-9428
Subject:
photosystem II,   etc   ; Helianthus annuus; chloroplasts; energy conversion; gene expression; genes; mitochondria; mutants; phytoene synthase; salicylic acid;     Show all 10 Subjects
Abstract:
... Salicylic acid (SA) is involved in several responses associated with plant development and defence against biotic and abiotic stress, but its role on photosynthetic regulation is still under debate. This work investigated energy conversion processes and related gene expression in the brachytic mutant of sunflower lingering hope (linho). This mutant was characterized by a higher ratio between the f ...
DOI:
10.1016/j.plaphy.2020.01.005

8. Thomas John Wydrzynski (8 July 1947–16 March 2018)

Author:
Conlan, Brendon; Govindjee,; Messinger, Johannes
Source:
Photosynthesis research 2019 v.140 no.3 pp. 253-261
ISSN:
0166-8595
Subject:
photosystem II,   etc   ; oxygen; research; researchers; scientists;     Show all 5 Subjects
Abstract:
... With this Tribute, we remember and honor Thomas John (Tom) Wydrzynski. Tom was a highly innovative, independent and committed researcher, who had, early in his career, defined his life-long research goal. He was committed to understand how Photosystem II produces molecular oxygen from water, using the energy of sunlight, and to apply this knowledge towards making artificial systems. In this tribut ...
DOI:
10.1007/s11120-018-0606-9
PubMed:
30478710
PubMed Central:
PMC6509086

9. Microplastics in bloom-forming macroalgae: Distribution, characteristics and impacts

Author:
Feng, Zhihua; Zhang, Tao; Shi, Huahong; Gao, Kunshan; Huang, Wei; Xu, Juntian; Wang, Jiaxuan; Wang, Rui; Li, Ji; Gao, Guang
Source:
Journal of hazardous materials 2020 v.397 pp. 122752
ISSN:
0304-3894
Subject:
photosystem II,   etc   ; Ulva prolifera; algal blooms; biomass; light intensity; macroalgae; microplastics; oceans; photochemistry; pollution; seawater; spatial distribution; Yellow Sea;     Show all 13 Subjects
Abstract:
... Macroalgal blooms and marine microplastics (MPs), as global challenges for oceans, are both showing a rising trend. However, none is known regarding the interaction of these two important issues. The Yellow Sea suffers the world’s largest green tides and severe MPs pollution as well. Therefore, we tracked the trapping of MPs by drifting Ulva prolifera in the Yellow Sea during the green-tide period ...
DOI:
10.1016/j.jhazmat.2020.122752

10. In vitro and in vivo impact assessment of eco-designed CuO nanoparticles on non-target aquatic photoautotrophic organisms

Author:
Pontes, Montcharles S.; Graciano, Daniela E.; Antunes, Débora R.; Santos, Jaqueline S.; Arruda, Gilberto J.; Botero, Eriton R.; Grillo, Renato; Lima, Sandro M.; Andrade, Luís H.C.; Caires, Anderson R.L.; Santiago, Etenaldo F.
Source:
Journal of hazardous materials 2020 v.396 pp. 122484
ISSN:
0304-3894
Subject:
photosystem II,   etc   ; Arthrospira platensis; Fourier transform infrared spectroscopy; Lemna; autotrophs; chlorophyll; cupric oxide; energy transfer; fluorescence; moieties; nanoparticles; photochemistry; phycocyanin;     Show all 13 Subjects
Abstract:
... This work has assessed the impact of copper oxide nanoparticles (CuONPs), designed via green route, toward photosynthetic apparatus on aquatic photoautotrophic organisms. In order to filling knowledge gaps, in vitro and in vivo assays were performed, using cyanobacterial phycocyanin (C-PC) from Arthrospira platensis and Lemna valdiviana plants (duckweed), respectively. Impairment in light energy t ...
DOI:
10.1016/j.jhazmat.2020.122484

11. Realtime kinetics of the light driven steps of photosynthetic water oxidation in living organisms by “stroboscopic” fluorometry

Author:
Gates, Colin; Ananyev, Gennady; Dismukes, G. Charles
Source:
Biochimica et biophysica acta 2020 v.1861 no.8 pp. 148212
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; Nannochloropsis; absorbance; algae; catalytic activity; chlorophyll; electrons; fluorescence; fluorometry; loci; oxidation; oxygen; photochemistry; plastoquinones; spectroscopy;     Show all 15 Subjects
Abstract:
... We develop a rapid “stroboscopic” fluorescence induction method, using the fast repetition rate fluorometry (FRRF) technique, to measure changes in the quantum yield of light emission from chlorophyll in oxygenic photosynthesis arising from competition with primary photochemical charge separation (P₆₈₀* ➔ P₆₈₀⁺QA⁻). This method determines the transit times of electrons that pass through PSII durin ...
DOI:
10.1016/j.bbabio.2020.148212

12. Effect of temperature on the phytotoxicity and cytotoxicity of Botryosphaeriaceae fungi

Author:
Nazar Pour, Forough; Ferreira, Vanessa; Félix, Carina; Serôdio, João; Alves, Artur; Duarte, Ana Sofia; Esteves, Ana Cristina
Source:
Fungal biology 2020 v.124 no.6 pp. 571-578
ISSN:
1878-6146
Subject:
photosystem II,   etc   ; Botryosphaeria dothidea; Neofusicoccum parvum; cell lines; culture filtrates; cytotoxicity; fungi; human diseases; necrosis; phytotoxicity; temperature; toxic substances;     Show all 12 Subjects
Abstract:
... Botryosphaeriaceae fungi are phytopathogens and human opportunists. The influence of temperature on the phytotoxicity and cytotoxicity of culture filtrates of five Botryosphaeriaceae species was investigated. All culture filtrates of fungi grown at 25 °C were phytotoxic: symptoms were evaluated based on visual inspection of necrosis areas and on the maximum quantum yield of photosystem II, Fᵥ/Fₘ. ...
DOI:
10.1016/j.funbio.2020.02.012

13. The effect of nicosulfuron and bentazon on photosynthetic performance of common cocklebur (Xanthium strumarium L.)

Author:
Hassannejad, Sirous; Porheidar Ghafarbi, Soheila; Lotfi, Ramin
Source:
Environmental and sustainability indicators 2020 v.6 pp. 100026
ISSN:
2665-9727
Subject:
photosystem II,   etc   ; Xanthium strumarium; bentazon; chlorophyll; electron transfer; energy; fluorescence; greenhouses; mechanism of action; nicosulfuron; photosystem I; plastoquinones; rapid methods;     Show all 13 Subjects
Abstract:
... In order to evaluate the effects of bentazon and nicosulfuron on the photosynthetic apparatus of X. strumarium in greenhouse condition, chlorophyll a fluorescence (ChlF) method was studied at 1, 2, 3, and 4 days after herbicide treatment (DAHT). Bentazon in comparison to nicosulfuron, dramatically affect ChlF parameters and the shape of polyphasic OJIP curves at 1 DAHT. Bentazon significantly decr ...
DOI:
10.1016/j.indic.2020.100026

14. High light intensity increases the concentrations of β-carotene and zeaxanthin in marine red macroalgae

Author:
Xie, Xiujun; Lu, Xiaoping; Wang, Lepu; He, Linwen; Wang, Guangce
Source:
Algal research 2020 v.47 pp. 101852
ISSN:
2211-9264
Subject:
photosystem II,   etc   ; Pyropia yezoensis; autotrophs; beta-carotene; complementary DNA; enzymes; harvesting; light intensity; lutein; lycopene; macroalgae; radiation resistance; sporophytes; zeaxanthin;     Show all 14 Subjects
Abstract:
... Light drives photosynthesis but may also cause photodamage. Oxygenic photosynthetic organisms have evolved various photoprotective responses to adapt to excessive light. Zeaxanthin and its precursor, β-carotene, play key photoprotective roles in higher plants and in most algae; however, it remains unclear if they are also involved in photoprotective responses in red algae. Here, we report that the ...
DOI:
10.1016/j.algal.2020.101852

15. Adverse effects of atrazine, DCMU and metolachlor on phytoplankton cultures and communities at environmentally relevant concentrations using Fast Repetition Rate Fluorescence

Author:
Beaulieu, Marieke; Cabana, Hubert; Huot, Yannick
Source:
The Science of the total environment 2020 v.712 pp. 136239
ISSN:
0048-9697
Subject:
photosystem II,   etc   ; adverse effects; algae; aquatic ecosystems; aquatic environment; atrazine; chlorophyll; fluorescence; fluorometry; freshwater; guidelines; metolachlor; phytoplankton; pollution; North America;     Show all 15 Subjects
Abstract:
... The widespread and persistent contamination of freshwater environments by low concentrations of pesticides is a growing concern worldwide. In aquatic environments, herbicide pollution is of greatest concern for phytoplankton, due to their similarities to terrestrial plants. Through the use of Fast Repetition Rate Fluorometry (FRRF) during weeklong experiments on 10 phytoplankton cultures from 4 cl ...
DOI:
10.1016/j.scitotenv.2019.136239

16. Enhanced NPQ affects long-term acclimation in the spring ephemeral Berteroa incana

Author:
Wilson, Sam; Ruban, Alexander V.
Source:
Biochimica et biophysica acta 2020 v.1861 no.4 pp. 148014
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; Arabidopsis thaliana; Berteroa incana; acclimation; chlorophyll; energy transfer; lutein; photochemistry; photostability; quinones; spring; terrestrial ecosystems; zeaxanthin;     Show all 13 Subjects
Abstract:
... The spring ephemeral Berteroa incana is a familial relative of Arabidopsis thaliana and thrives in a diverse range of terrestrial ecosystems. Within this study, the novel chlorophyll fluorescence parameter of photochemical quenching in the dark (qPd) was used to measure the redox state of the primary quinone electron acceptor (QA) in order to estimate the openness of photosystem II (PSII) reaction ...
DOI:
10.1016/j.bbabio.2019.03.005

17. Design principles of solar light harvesting in plants: Functional architecture of the monomeric antenna CP29

Author:
Mascoli, Vincenzo; Novoderezhkin, Vladimir; Liguori, Nicoletta; Xu, Pengqi; Croce, Roberta
Source:
Biochimica et biophysica acta 2020 v.1861 no.3 pp. 148156
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; Chlorophyta; antennae; chlorophyll; chlorophyll binding proteins; energy conversion; models; mutational analysis; photons; photosynthetic reaction centers; solar radiation; spectroscopy;     Show all 12 Subjects
Abstract:
... In plants and green algae, light-harvesting complexes (LHCs) are a large family of chlorophyll binding proteins functioning as antennae, collecting solar photons and transferring the absorbed energy to the photosynthetic reaction centers, where light to chemical energy conversion begins. Although LHCs are all highly homologous in their structure and display a variety of common features, each compl ...
DOI:
10.1016/j.bbabio.2020.148156

18. PGR5 and NDH-1 systems do not function as protective electron acceptors but mitigate the consequences of PSI inhibition

Author:
Rantala, Sanna; Lempiäinen, Tapio; Gerotto, Caterina; Tiwari, Arjun; Aro, Eva-Mari; Tikkanen, Mikko
Source:
Biochimica et biophysica acta 2020 v.1861 no.3 pp. 148154
ISSN:
0005-2728
Subject:
photosystem II,   etc   ; Arabidopsis thaliana; NAD (coenzyme); NADH dehydrogenase; Physcomitrella patens; electron transfer; electrons; genotype; mutants; photoinhibition; photoperiod; proteins;     Show all 12 Subjects
Abstract:
... Avoidance of photoinhibition at photosystem (PS)I is based on synchronized function of PSII, PSI, Cytochrome b₆f and stromal electron acceptors. Here, we used a special light regime, PSI photoinhibition treatment (PIT), in order to specifically inhibit PSI by accumulating excess electrons at the photosystem (Tikkanen and Grebe, 2018). In the analysis, Arabidopsis thaliana WT was compared to the pg ...
DOI:
10.1016/j.bbabio.2020.148154

19. Photosystem II 22kDa protein level ‐ a prerequisite for excess light‐inducible memory, cross‐tolerance to UV‐C and regulation of electrical signalling

Author:
Górecka, Magdalena; Lewandowska, Maria; Dąbrowska‐Bronk, Joanna; Białasek, Maciej; Barczak‐Brzyżek, Anna; Kulasek, Milena; Mielecki, Jakub; Kozłowska‐Makulska, Anna; Gawroński, Piotr; Karpiński, Stanisław
Source:
Plant, cell and environment 2020 v.43 no.3 pp. 649-661
ISSN:
0140-7791
Subject:
photosystem II,   etc   ; acclimation; cell death; chlorophyll; chloroplasts; energy; fluorescence; pH; protein content; red light; transcriptomics; ultraviolet radiation;     Show all 12 Subjects
Abstract:
... It is well known that PsbS is a key protein for the proper management of excessive energy in plants. Plants without PsbS cannot trigger non‐photochemical quenching, which is crucial for optimal photosynthesis under variable conditions. Our studies showed wild‐type plants had enhanced tolerance to UV‐C‐induced cell death (CD) upon induction of light memory by a blue or red light. However, npq4‐1 pl ...
DOI:
10.1111/pce.13686

20. Effects of cobalt on spore germination, gametophyte growth and development, and juvenile sporophyte growth of Saccharina japonica (Phaeophyceae)

Author:
Wang, Xuemei; Shan, Tifeng; Pang, Shaojun
Source:
Journal of applied phycology 2020 v.32 no.1 pp. 511-518
ISSN:
0921-8971
Subject:
photosystem II,   etc   ; Saccharina japonica; cobalt; gametophytes; juveniles; macroalgae; nuclear power; phytoremediation; pollution; power plants; seawater; spore germination; sporophytes; toxicity; wastewater;     Show all 15 Subjects
Abstract:
... Cobalt (Co), an essential element that is toxic in excess amounts, is a major component of wastewater that has accidentally been released from nuclear power plants. However, the effects of Co in seawater on the life cycle of macroalgae have seldom been investigated. Here, we tested the effects of different Co concentrations (1, 10, 50, 100, 200, 500, and 1000 μg L⁻¹) on spore germination, gametoph ...
DOI:
10.1007/s10811-019-01955-x